Chapter 4781-6 Installation Standards

4781-6-01 Installation of new manufactured homes.

(A) General

(1) Chapter 4781-6 of the Administrative Code is designated as the "Model Manufactured Home Installation Standards." The model manufactured home installation standards as adopted under by the department of housing and urban development pursuant to 42 USC 3535 , 42 USC 5403 , 42 USC 5404 , and 42 USC 5424 dated October 19, 2007, and as set forth in 24 CFR 3285 dated October 19, 2007, as the adoption date of this rule is incorporated fully as if set out at length herein but as altered with additions, substitutions, and deletions indicated in this rule.

(2) The provisions of the model manufactured home installation standards shall apply to the installation, construction, use and occupancy, and location of every new manufactured home installed in the state on private property or in a manufactured home park.

(3) The intent of this rule is to establish uniform requirements for the installation of new manufactured homes on private property or in a manufactured home park.

(4) Where, in any specific case, different parts of this rule specify different materials, methods of installation, or other requirements, the most restrictive shall govern. Where there is a conflict between the general requirement and the specific requirement, the specific requirement shall be applicable.

(5) Exceptions:

(a) Wood footings or wood foundations as provided in 24 CFR 3285.312(a)(2) dated October 19, 2007, shall be prohibited in the installation of a manufactured home;

(b) Footings shall be twenty-eight day compressive strength of three thousand pounds per square inch (psi) instead of the twelve hundred as provided in 24 CFR 3285.312(a)(1)(i) dated October 19, 2007;

Effective: 06/02/2011
R.C. 119.032 review dates: 10/01/2014
Promulgated Under: 119.03
Statutory Authority: 4781.04 , 4781.07
Rule Amplifies: 4781.04 , 4781.07 , 4781.14
Prior Effective Dates: 01/01/2010

4781-6-01.1 [Rescinded] Reference publications and definitions.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04 , 4781.07
Rule Amplifies: 4781.04 , 4781.07 , 4781.14
Prior Effective Dates: 1/1/2010, 6/2/2011

4781-6-01.2 [Rescinded] Stairways and steps.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-02 Installation standards for used manufactured homes.

(A) General.

(1) Administration.

(a) Scope.

These installation standards provide minimum requirements for the initial installation of used or relocated mobile or manufactured homes and shall apply to the installation and occupancy of mobile and manufactured homes in Ohio. This includes "HUD units" and "pre HUD units."

(b) Purpose.

The purpose of Chapter 4781-6 of the Administrative Code is to provide minimum requirements to safeguard the public safety, health and general welfare through affordability, structural strength, means of egress facilities, stability, sanitation, and safety to life and property from fire and other hazards attributed to the built environment. The requirements for used or relocated manufactured homes set forth in rule 4781-6-02 of the Administrative Code may be exceeded by a home owner or installer, but no authority having jurisdiction shall require a homeowner or installer to exceed rule 4781-6-02 of the Administrative Code except where specifically permitted under Chapter 4781-6 of the Administrative Code.

(c) Applicability.

Where in any specific case, different sections of rule 4781-6-02 of the Administrative Code specify different materials, methods of construction or other requirements, the most restrictive shall govern. Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall be applicable.

(d) Rule 4781-6-02 of the Administrative Code shall apply to any installation of any used or relocated manufactured homes for use as a residence. Rule 4781-6-01 of the Administrative Code shall apply to any installation of an used or relocated manufactured home unless specifically set forth in rule 4781-6-02 of the Administrative Code.

(e) Partial invalidity.

In the event any part or provision of rule 4781-6-02 of the Administrative Code is held to be unlawful or void this shall not have the effect of making void or unlawful any of the other parts or provisions of rule 4781-6-02 of the Administrative Code.

(f) Existing structures.

The legal occupancy of any structure existing on the date of the adoption of rule 4781-6-02 of the Administrative Code shall be permitted to continue without change, except as is specifically covered in rule 4781-6-02 of the Administrative Code, or as is deemed necessary by the authority having jurisdiction for the general safety and welfare of the occupants and the public.

(g) Additions, alterations, replacement or repairs to existing installation or foundation systems.

Prior to the performance of work, the authority having jurisdiction shall determine if the existing foundation system can support the load of the used manufactured home. The foundation system shall also conform to rule 4781-6-02 of the Administrative Code. If greater than fifty per cent is to be replaced or repaired, the entire installation or foundation system shall conform to the requirements for a used manufactured home and Additions, alterations or repairs shall not cause a used manufactured home to become unsafe or adversely affected.

(h) Alternate products, equipment and materials used during the installation of a used manufactured home that have been approved by the Ohio board of building standards and are not mentioned in rule 4781-6-02 of the Administrative Code and not expressly prohibited in Chapter 4781. of the Revised Code or the rules promulgated thereunder this rule may be approved for use on the installation of a used manufactured homes by the authority having jurisdiction when used in accordance with the products, equipment and materials listing and labeling. Products, equipment and material to be installed in association with the installation of manufactured homes which have not been approved by the board of building standards shall be approved in advance of their use by the commission.

(i) If rule 4781-6-02 of the Administrative Code is silent on the installation of a manufactured home that includes accessory buildings or structures, those optional elements shall be constructed in a manner consistent with the residential code of Ohio. The inspection of these optional elements does not fall under the jurisdiction of the commission, but rather the board of building standards.

Installers must contact the authority having jurisdiction to perform the inspection on these optional elements. Commission certified third party inspection agencies and certified health departments are not authorized to perform the inspections on these optional elements.

(2) Installation instructions.

(a) Manufacturer's instructions.

The installer shall install the used manufactured home in accordance with the manufacturer's installation manual. If there is not a manufacturer's installation manual for the installation of a used manufactured home, the installer shall install the used manufactured home in accordance with rule 4781-6-02 of the Administrative Code or in accordance with NFPA 225 2005 edition.

(b) Variations to installation instructions.

When an installer does not provide support and anchorage in accordance with the approved manufacturer's installation instructions, or in accordance with rule 4781-6-02 of the Administrative Code or encounters site (such as areas that are subject to flood damage or high seismic risk) or other conditions that prevent the use of the instructions or this rule, the installer shall obtain special site-specific instructions from the manufacturer or use a design by an Ohio registered professional engineer or registered architect for the support and anchorage of the manufactured home.

(3) Alterations during initial installations.

Additions, modifications, replacement or removal of any equipment that affects the installation of a used manufactured home shall meet or exceed the requirements of these installation standards, the MHCSS, 24 C.F.R. 3280, and the "Manufactured Home Procedural and Enforcement Regulations" 24 C.F.R. 3282. An alteration shall not affect the ability of the basic manufactured home to comply with the MHCSS and the alteration shall not impose additional loads to the manufactured home or its foundation unless the alteration is included in the manufacturer's DAPIA-approved designs and installation instructions, or is designed by an Ohio registered professional engineer or architect in accordance with the manufactured home design and with MHCSS.

Effective: 12/01/2012
R.C. 119.032 review dates: 10/01/2014
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/11

4781-6-02.1 [Rescinded] Pre-installation considerations.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-02.2 [Rescinded] Site preparation.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-02.3 [Rescinded] Foundations.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-02.4 [Rescinded] Anchorage against wind.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010

4781-6-02.5 [Rescinded] Optional features.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-02.6 [Rescinded] Ductwork and plumbing and fuel supply systems.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-02.7 [Rescinded] Electrical systems and equipment.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-02.8 [Rescinded] Exterior and interior close-up.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-02.9 [Rescinded] Information for installers.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 7/1/2007, 1/1/2010

4781-6-02.10 [Rescinded] Stable foundations-commission approved alternative park installations.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 7/1/2007, 1/1/2010

4781-6-02.11 [Rescinded] Commission approved alternative installation designs for used manufactured homes.

Effective: 12/01/2012
R.C. 119.032 review dates: 09/14/2012
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 7/1/2007, 1/1/2010, 6/2/2011

4781-6-03 Reference publications and definitions for installation of new and used manufactured homes.

(A) Referenced publications

(1) In addition to any referenced publication in any rule in Chapter 4781-6 of the Administrative Code, the specifications, standards, and codes of the following organizations are incorporated by reference as though set forth in full in any rule in Chapter 4781-6 of the Administrative Code.

(2) Any standard incorporated by reference shall have the same force and effect as the installation standards set forth in Chapter 4781-6 of the Administrative Code, except that wherever reference standards are in conflict with any rule of Chapter 4781-6 of the Administrative Code, the requirements of the rules in Chapter 4781-6 of the Administrative Code prevail to the extent of the conflict.

(3) Where the enforcement of an installation standard would violate the conditions of the listing of equipment or appliance, the conditions of the listing and manufacturer's installation instructions shall apply.

(4) The abbreviations and addresses of organizations issuing the referenced standards appear in this paragraph. Reference standards that are not available from their producer organizations may be obtained from the "Office of Manufactured Housing Programs, Room 9164, U.S. Department of Housing and Urban Development, 451 Seventh Street, SW Washington, DC 20410."

(a) "Air Conditioning Contractors of America (ACCA), 2800 Shirlington Road, Suite 300, Arlington, VA 22206. ACCA Manual J, Residential Load Calculation, eighth edition."

(b) "The Engineered Wood Association, (APA) 7011 South Nineteenth Street, Tacoma, Washington 98411, (253) 565-6600, facsimile (253) 565-7265. PS-1-95, Construction and Industrial Plywood (with typical APA trademarks), 1995 edition."

(c) "American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. ASHRAE Handbook of Fundamentals, 1997 inch-pound edition."

(d) "American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM C 90, Standard Specification for Load Bearing Concrete Masonry Units, 2002. ASTM D 1586, Test Method for Penetration Test and Split-Barrel Sampling of Soils, 1999. ASTM D 2487, Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System), 2000. ASTM D 2488, Practice for Description and Identification of Soils (Visual-Manual Procedure), 2000. ASTM D 3953, Standard Specification for Strapping, Flat Steel and Seals, 1997."

(e) "American Wood-Preservers' Association (AWPA), P.O. Box 388, Selma AL 36702. AWPA M4-02, "Standard for the Care of Pressure Treated Wood Products, 2002. AWPA U1-04, Use Category System; User Specification for Treated Wood, 2004."

(f) "Federal Emergency Management Administration (FEMA), 500 C Street, SW, Washington D.C. 20472. FEMA 85 / September 1985, Manufactured Home Installation in Flood Hazard Areas, 1985."

(g) "Manufactured Homes Construction and Safety Standards, revised April 1, 1995 (MHCSS). Department of Housing and Urban Development (HUD), Manufactured Housing Standards Division, Office of Manufactured Housing and Regulatory Functions, Room 9152, 451 Seventh Street, S.W., Washington, DC 20410."

(h) "National Fire Protection Association (NFPA), 1 Batterymarch Park, Quincy, MA 02169-7471. NFPA 31, Standard for the Installation of Oil Burning Equipment, 2001. NFPA No. 70, National Electrical Code, 2000. NFPA 501A, Standard for Fire Safety Criteria for Manufactured Home Installations, Sites, and Communities, 2009 edition."

(i) "Structural Engineering Institute/American Society of Civil Engineers (SEI/ASCE), 1801 Alexander Bell Dr., Reston, VA 20191. SEI/ASCE 32-01, Design and Construction of Frost Protected Shallow Foundations, 2001."

(j) "Underwriters Laboratories (UL), 333 Pfingsten Road, Northbrook, Illinois 60062. UL 181, Factory Made Air Ducts and Connectors, 1996 with 1998 revisions. UL 181A, Standard for Safety Closure Systems for use with Rigid Air Ducts and Air Connectors, 1994, with 1998 revisions. UL 181B, Standard for Safety Closure Systems for use with Flexible Air Ducts and Air Connectors, 1995, with 1998 revisions."

(B) Definitions

In addition to the definitions contained in the model manufactured home installation standards, the following definitions apply to the installation standards for the installation of new, used, or relocated manufactured homes. Where terms are not included, common usage of the term applies. The definitions are as follows:

(1) "Accessible" means able to approach, access a fixture, connection, appliance, or equipment. Access shall be permitted to require the removal of an access panel, door or similar obstruction.

(2) "Accessibility" means the removal of architectural barriers for the purpose of providing access to persons with disabilities.

(3) "Accessory building or structure" means any structure that supports its own load and is established for use of the occupant of the manufactured home specifically including, but not limited to, storage sheds, garages, basements, awnings, carports, decks, steps and ramps.

(4) "Air conditioner" means all equipment intended or installed for the purpose of processing the treatment of air so as to control simultaneously its temperature, humidity, cleanliness, and distribution to meet the requirements of the conditioned space. This includes "comfort cooling equipment."

(5) "Alteration" means any change, addition, repair conversion, replacement, modification or removal of any equipment or installation which may affect the operation, construction, installation or occupancy of a manufactured home.

(6) "Anchor assembly" means any device or other means designed to transfer home anchoring loads to the ground.

(7) "Anchoring equipment" means ties, straps, cables, turnbuckles, chains, and other approved components, including tensioning devices that are used to secure a manufactured home to the ground or foundation.

(8) "Anchoring system" means a combination of anchoring equipment and anchor assemblies that will, when properly designed and installed, resist the uplift, overturning, and lateral forces on the manufactured home, and on its support and foundation system.

(9) "Approved," when used in connection with any material, appliance or installation or on- site construction, means complying with the requirements of the Ohio manufactured homes commission. For new manufactured home factory construction, approved means complying with the requirements of the MHCSS.

(10) "Arid region" means an area subject to fifteen inches or less of annual rainfall.

(11) "Attached garage" means a garage which is designed to be structurally independent of a manufactured home but may be attached to a manufactured home in accordance with rule 4781-6-02 of the Administrative Code.

(12) "Authority having jurisdiction" means the commission certified agencies given authority to review plans, issue permits, and perform inspections in accordance with Chapter 4781. of the Administrative Code. The Ohio manufactured homes commission has statewide authority pursuant to Chapter 4781. of the Revised Code with regard to the installation of manufactured homes. Some counties and municipalities may have authority with regard to local zoning ordinances or other regulations outside the coverage of rules 4781-6-01 and 4781-6-02 of the Administrative Code.

(13) "Base flood" means a flood having a one percent chance of being equaled or exceeded in any given year.

(14) "Base flood elevation" (BFE) means the elevation of the base flood, including wave height, relative to the datum specified on an authority having jurisdiction's flood hazard map.

(15) "Bonding" means the permanent joining of metallic parts to form an electrically conductive path that will ensure electrical continuity and the capacity to conduct safely any current likely to be imposed.

(16) "Building drain" means that part of the lowest piping of a drainage system which receives the discharge from soil, water-born waste, and other drainage pipes inside the walls of the manufactured home and conveys it to the building sewer.

(17) "Building sewer" means that part of the horizontal piping of a drainage system which extends from the end of the building drain and which receives the discharge of the building drain and conveys it to a public sewer, private sewer, individual sewage disposal system or other point of disposal.

(18) "Building supply" means the pipe carrying potable water from the water meter or other source of water supply to a building or other point of use or distribution on the lot. Building supply shall also mean the water service.

(19) "Carport" means a stationary structure consisting of a roof with its supports and not more than one wall, or storage cabinet substituting for a wall, and used for sheltering motor vehicles.

(20) "Chassis" means the entire transportation system comprising the following subsystems: drawbar and coupling mechanism, frame, running gear assembly, and lights.

(21) "Clearance" means the minimum allowable distance between two adjacent surfaces or points.

(22) "Comfort cooling certificate" means a certificate permanently affixed to an interior surface of the home specifying the factory design and preparations for air conditioning the manufactured home.

(23) "Commission" means the Ohio manufactured homes commission.

(24) "Concealed" means rendered inaccessible by the structure or finish of the manufactured home or accessory building.

(25) "Construction" means the arrangements and methods of building including, but not limited to, fire and life safety, electrical, plumbing and mechanical equipment and systems within a manufactured home which are typically performed and inspected at the manufacturer's factory.

(26) "Crossovers" means utility interconnections in multi-section homes that are located where the sections are joined. Crossover connections include heating and cooling ducts, electrical circuits, and water pipes, drain plumbing, and gas lines.

(27) "Deck" means a self-supporting, outside walking area greater than thirty-six square feet in area, having a floor that is elevated more than eight inches above grade. The deck shall be constructed in accordance with the residential code of Ohio; except for decks which are an integral part of the home and built at the factory as part of the manufactured home the MHCSS shall apply.

(28) "Design Approval Primary Inspection Agency" (DAPIA) is a state or private organization that has been accepted by the HUD secretary in accordance with the requirements of part 3282, subpart H, which evaluates and approves or disapproves manufactured home designs and quality control procedures.

(29) "Designed foundation system" means a foundation system designed by an Ohio licensed or registered Ohio architect or professional engineer or a foundation system designed by the manufactured home's DAPIA regardless of the state of registration or licensing of the DAPIA.

(30) "Diagonal tie" means a tie intended primarily to resist horizontal or shear forces, but which may secondarily resist vertical, uplift, and overturning forces.

(31) "Drain" means a pipe that carries waste, water, or water-borne waste in a drainage system.

(32) "Drain connector" means the removable extension, consisting of all pipes, fittings and appurtenances from the drain outlet to the drain inlet serving the manufactured home.

(33) "Drain outlet" means the lowest end of the drain to which a sewer connection is made.

(34) "Drainage system" means all piping within or attached to the home that conveys sewage or other liquid waste to the drain outlet, not including the drain connector.

(35) "Engineered foundation system" means a certified and approved engineered system of prefabricated foundation supports installed to manufacturer's installation instructions.

(36) "Egress" means a path or opening for going out of a building, dwelling, home, or manufactured home.

(37) "Factory built porch" means an exterior porch, deck, or landing, including roof, built by the manufactured home manufacturer and shipped with the manufactured home.

(38) "Feeder assembly" means the overhead or under-chassis feeder conductors, including the grounding conductor, together with the necessary fittings and equipment, or a power supply cord approved for manufactured home use, that are designed for the purpose of delivering energy from the source of electrical supply to the distribution panel board within the manufactured home.

(39) "Fill" means a deposit of materials intended to raise an existing grade and includes, but is not limited to, the following types:

(a) "Engineered fill" means fill over twelve inches in depth placed in layers of soil, crushed stone or masonry waste material, free of expansive soils and organic materials, compacted and tested according to accepted engineering practices to insure that it meets the required load bearing capacity and specified compaction standards as determined by laboratory tests of soil samples from the fill material.

(b) "Non-engineered approved fill" means fill of twelve inches or less in depth consisting of soil, crushed stone or masonry waste material, free of expansive soils and organic materials, compacted with two passes of a vibrating compacting machine.

(c) "Uncompacted fill" means fill which may include soil, crushed stone, masonry waste material, expansive soils , and organic materials, or is of unknown content, and does not meet the definitions of engineered or non-engineered, approved fill.

(d) Fill does not include the six inches of gravel required on some manufactured home stands.

(40) "Flood hazard area" means the greater of either: the special flood hazard area shown on the flood insurance rate map; or the area subject to flooding during the design flood and shown on an authority having jurisdiction's flood hazard map, or otherwise legally designated.

(41) "Flood hazard map" means a map delineating the flood hazard area and adopted by an authority having jurisdiction.

(42) "Footing" means that portion of the support system that transmits loads directly to the soil.

(43) "Frame" means the fabricated, rigid substructure which provides permanent support to the affixed manufactured home structure above the frame, both during transport and on-site; and also provides a platform for securement of the running gear assembly, the draw bar and the coupling mechanism.

(44) "Foundation" means the basis or base which a wall or structural support stands, is founded, or supports footings on solid ground.

(45) "Frost Depth" means the maximum approved depth to which frost penetrates the earth in a specific climatic region which is determined by the local authority having jurisdiction.

(46) "Gas supply connector" means a listed flexible connector designed to connect the manufactured home to the gas supply source.

(47) "Grade" has the following meanings:

(a) "Grade" as it relates to plumbing means the fall (slope) of a pipe in reference to a horizontal plane expressed in inches per foot length.

(b) "Grade" as it relates to the earth means the finished soil level adjoining the home at all exterior walls.

(48) "Grounded" means connected to earth or to some conducting body that serves in place of the earth.

(49) "Ground anchor" means a specific anchoring assembly device designed to transfer manufactured home anchoring loads to the ground.

(50) "Ground level installation" means a manufactured home with a below-grade foundation system and a perimeter retaining wall or foundation which is back filled against it.

(51) "HUD Act" means the National Manufactured Housing Construction and Safety Standards Act of 1974, 42 U.S.C. 5401 - 5426 .

(52) "Inspection Primary Inspection Agency" (IPIA) means a state or private organization that has been accepted by the secretary of HUD to evaluate the ability of manufactured home manufacturers to follow approved quality control procedures and provide ongoing surveillance of the manufacturing process.

(53) "Inspector" means a commission certified inspector. An commission certified inspector has the right to inspect the installation of a manufactured home and any elements that deal with installation of a manufactured home that are under the jurisdiction of the commission. An inspector also has the right to conduct plans reviews. Any new construction, other than the foundations of the home and the means of egress such as stairs, landings, handrails, ramps, platforms and guard rails, electrical and plumbing connections, are not under his jurisdiction for inspection such as basements, garages, sheds, carports, and room additions are not the inspector's jurisdiction unless specifically indicated in the manufacturer's installation manual for that specific home installation.

(54) "Installation" shall have the same meaning as set forth in divisions (B)(1) to (B)(4) of section 4781.01 of the Revised Code, and, in relation to construction, is performed at a location away from the manufacturer's factory. The leveling of the home on a foundation system defines the commencement of the installation and/or set-up.

(55) "Installation permit" means the legal right to install a manufactured home that is obtained by paying for all fees prescribed by law prior to commencement of any work required to install a manufactured home. This permit is a legal paper document issued by the authority having jurisdiction upon receiving payment in full.

(56) "Installation standards or standards" means the installation standards established in Chapter 4781. of the Revised Code and the rules promulgated thereunder for the installation of new and used manufactured or mobile homes, when the manufacturer's installation instructions are not obtainable, at the place of occupancy, to ensure proper siting, the joining of all sections of the home, and the installation of stabilization, support, or anchoring systems.

(57) "Installer" means any individual licensed by the commission to create footings, install, set-up connect, hook-up, block, tie-down, secure, level, support, install steps, install skirting, or makes electrical, plumbing, or mechanical connections to manufactured homes, or who provides consultation or supervision for any of these activities.

(58) "Labeled" means a label, symbol, or other identifying mark of a nationally recognized testing laboratory, inspection agency, or other organization concerned with product evaluation that maintains periodic inspection of production of labeled equipment or materials, and by whose labeling is indicated compliance with nationally recognized standards or tests to determine suitable usage in a specified manner.

(59) "Landing" means a self-supporting outside walking area equal or less than thirty-six square feet in an area and having a floor that is elevated more than eight inches above grade. No landing shall be less than the dimension of the door that swings over the landing. Every landing shall have a minimum dimension of twenty-four inches in the direction of travel.

(60) "Listed" means included in a list published by a nationally recognized testing laboratory, inspection agency, or other organization concerned with product evaluation that maintains periodic inspection of production of listed equipment or materials, and whose listing states either that the equipment or material meets nationally recognized standards or has been tested and found suitable for use in a specified manner.

(61) "Lot" means any space area or tract of land or portion of a manufactured home park which is designated or used for occupancy by one manufactured home.

(62) "Lowest floor" means the floor of the lowest enclosed area of a manufactured home. An unfinished or flood resistant enclosure, used solely for vehicle parking, home access or limited storage, shall not be considered the lowest floor, provided the enclosed area is not constructed so as to render the home in violation of the flood-related provisions of this rule.

(63) "Manufactured home" has the same meaning as in division (C) of section 3781.06 of the Revised Code.

(64) "Manufactured Home Construction and Safety Standards" (MHCSS) means the manufactured home construction and safety standards established in part 3285 of the HUD Act pursuant to section 604 of the HUD Act, 42 U.S.C. 5403 .

(65) "Manufactured home gas supply connector" means a listed connector designed for connecting the manufactured home to the gas supply source.

(66) "Manufactured home site" means a designated parcel of land designed for the installation of one manufactured home for the exclusive use of the occupants of the home.

(67) "Manufacturer's installation instructions" means DAPIA-approved instructions provided by the home manufacturer that accompany each new manufactured home and detail the home manufacturer requirements for support and anchoring systems, and other work completed at the installation site.

(68) "Means of egress" means a continuous and unobstructed path of vertical and horizontal egress travel from any occupied portion of a building, structure, dwelling, home, or manufactured home to a public way or open place of safety.

(69) "Mobile home" means a manufactured home constructed prior to 1976. For the purposes of these installation standards, an installation requirement for a manufactured home is also a requirement for a mobile home.

(70) "Noncompliance" means that the manufactured home does not comply with MHCSS, the manufactured home's installation manual, these rules or the residential building code.

(71) "Permit" see "Installation permit".

(72) "Person" has the same meaning as in section 1.59 of the Revised Code and also includes this state, any political subdivision of this state, and any other state or local body of this state.

(73) "Pier" means that portion of the support system between the footing and the manufactured home, exclusive of shims.

(74) "Plenum" means an air compartment that is part of an air-distribution system to which one or more ducts or outlets are connected.

(75) "Porch" means a self-supporting, outside, covered, walking area having a floor that is elevated more than eight inches above grade.

(76) "Ramada" means any freestanding roof or shade structure, installed or erected above a manufactured home or any portion thereof, which may also extend over a patio or parking space and is used principally for protection from snow, sun or rain.

(77) "Readily accessible" means direct access without the necessity of removing any panel, door, or similar obstruction.

(78) "Recessed porch" means an open floor area supported by the main frame, is located outside the exterior walls of the manufactured home and may be enclosed by a roof, three or less walls, screening or glass.

(79) "Regulator" means either "pressure regulator" means a device placed in a gas line for reducing controlling and maintaining the pressure that portion of the piping system downstream of the device or "service regulator" means a pressure regulator installed by the serving gas supplier to reduce and limit the service line gas pressure to the delivery pressure.

(80) "Repair" means the reconstruction or renewal of any part of an existing manufactured home or piece of equipment for the purpose of its maintenance.

(81) "Replacement in kind" means replacing equipment or accessories with approved like equipment or accessories, such as switches, thermostats, fittings, elements or motors but does not include the replacement of major portions of the structural, plumbing, electrical, or mechanical system.

(82) "Running gear assembly" means the subsystem consisting of suspension springs, axles, bearings, wheels, hubs, tires, and brakes with their related hardware.

(83) "Secretary" means the secretary of housing and urban development (HUD) or an official of HUD delegated the authority of the secretary with respect to the HUD Act.

(84) "Service equipment" means the equipment containing the disconnecting means over current protective devices and receptacles or other means for connecting a manufactured home feeder assembly.

(85) "Setbacks" - see paragraph (A)(2) of rule 4781-6-02.1 of the Administrative Code.

(86) "Set up" - see "Installation." The leveling of the home on a foundation system defines the commencement of the installation and/or set-up.

(87) "Shim" shall mean a thin tapered piece of approved material, including hardwood, corrosion resistant metal, or abs plastic, used to fill gaps and to level a manufactured home. A shim shall be a minimum nominal four inches by six inches by one inch thick. Shims shall be used in pairs in opposing directions not to exceed one inch in height. Pressure treated shims shall not be used in direct contact with I-beams or other metals.

(88) "Site" means a designated parcel of land designed to accommodate a manufactured home, its accessory structures or buildings and accessory equipment for the exclusive use of the occupants.

(89) "Skirting" means a weather-resistant material used at the perimeter of the manufactured home to enclose the space under the living area of the home, from the bottom of the manufactured home to grade.

(90) "Stabilizing devices" means all components of the anchoring and support systems, such as piers, footings, ties, anchoring equipment, anchoring assemblies, or any other equipment, materials and methods of construction, that support and secure the manufactured home to the ground.

(91) "Stand" means that area of the manufactured home site which has been reserved for the placement of a manufactured home. In manufactured home parks, pursuant to paragraph (M) of rule 3701-27-01 of the Administrative Code, a manufactured home stand is called a manufactured home lot.

(92) "State" means the state of Ohio.

(93) "Support system" means pilings, columns, footings, piers, foundation walls, shims, and any combination thereof that, when properly installed, support the manufactured home.

(94) "Tie" or "tie down" means straps, cable, or securing devices used to connect the manufactured home to anchoring assemblies.

(95) "Ultimate load" means the absolute maximum magnitude of load that a component or system can sustain, limited only by failure.

(96) "Utilities" means the water, sewer, gas, or electrical services provided on a lot for a manufactured home.

(97) "Utility connection" means the installation and connection of the manufactured home to utilities that include, but are not limited to electricity, water, sewer, gas, or fuel oil.

(98) "Vertical tie" means a tie intended to resist uplifting and overturning forces.

(99) "Water distribution system" means potable water piping within, or permanently attached to the manufactured home.

(100) "Wind zone" means the areas designated on the "Basic Wind Zone Map" as further defined in section 3285.405 of the 2003 edition of the model manufactured home installation standards that delineate the wind design load requirements as determined by the fastest mile wind speed (miles per hour) within each area. In wind zone 1, the horizontal design wind load shall not be less than fifteen psf and net uplift load shall not be less than nine psf.

(101) "Working load" means the maximum recommended load that may be exerted on a component or system determined by dividing the ultimate load of a component or system by an appropriate factor of safety.

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04

4781-6-03.1 Pre-installation considerations.

(A) Site safety considerations

(1) Distances. Fire separation distances shall be in accordance with the requirements of chapter six of NFPA 501A, 2003 edition, or the ordinances of the authority having jurisdiction whichever is most stringent. In manufactured home parks, the commission separation standards as set forth in rules 4781-12-08 and 4781-12-08.1 of the Administrative Code shall govern.

(2) Set back measurement. Setback distances are measured from the lot line or the edge of the road to the eaves, awning carport , attached porch, or accessory building or to a deck or other combustible element of the home which projects out the furthest. In manufactured home parks, setbacks shall be measured in accordance with Chapter 4781-12-08 of the Administrative Code.

(3) Fire separation distances shall be in accordance with the requirements of Chapter 6 of NFPA 501A, 2005 edition or the requirements of the local authority having jurisdiction or the manufacturer installation manual.

(B) Installation of manufactured homes in flood hazard areas

(1) Definitions. Except to the extent otherwise defined in rule 4781-6-02 of the Administrative Code, the terms use in these standards are as defined in 44 C.F.R. 59.1 (Feb. 8, 1984) of the "National Flood Insurance Program" ("NFIP") regulations.

(2) Applicability. The provisions of this rule apply to the initial installation of new or used manufactured homes. All manufactured homes located where there is a local floodplain authority shall be installed in accordance with the local floodplain authority rules, ordinances or resolutions.

(3) Pre-installation considerations. Prior to the initial installation of a new or used manufactured home, the installer is responsible to determine whether the manufactured home site lies wholly or partly within a special flood hazard area as shown on the authority having jurisdiction's "Flood Insurance Rate Map", Flood Boundary and Floodway Map," or "Flood Hazard Boundary Map." If so located, and before an installation method is agreed upon, the map and supporting studies adopted by the authority having jurisdiction shall be used to determine the flood hazard zone and base flood elevation at the site.

(4) General elevation and foundation requirements

(a) Methods and practices. Manufactured homes located wholly or partly within special flood hazard areas shall be installed on foundations engineered to incorporate methods and practices that minimize flood damage during the base flood, in accordance with the requirements of the authority having jurisdiction, the floodplain authority, FEMA 85, 44 C.F.R. 60.3(a) to (e) (Feb. 8, 1984), other provisions of 44 C.F.R.60 referenced by those paragraphs, Chapter 1521. of the Revised Code, and division 1501:22 of the Administrative Code.

(b) Related guidance. Refer to FEMA 85 /September 1985, "Manufactured Home Installation in Flood Hazard Areas," 1985 and the local floodplain authority.

(C) Design zone maps. The design zone maps are those identified in the MHCSS

(1) Wind zone. Manufactured homes shall not be installed in a wind zone that exceeds the design wind loads for which the home has been designated, as evidenced by the wind zone indicated on the home's data plate. The design wind zone in Ohio is zone one; homes designed for wind zone one, wind zone two, or wind zone three are acceptable. In wind zone 1, the horizontal design wind load shall not be less than fifteen per square foot (psf) and the net uplift shall not be less than nine per square foot (psf).

(2) Roof load zone. Manufactured homes shall not be located in a roof load zone that exceeds the design roof load for which the home has been designed as evidenced by the roof load zone indicated on the home's data plate. Refer to rule 4781-6-02.3 of the Administrative Code for special snow load conditions. The design snow load in Ohio shall not be less than twenty pounds per square foot (psf).

(3) Thermal zone. New manufactured homes shall not be installed in a thermal zone that exceeds the thermal zone for which the home has been designed as evidenced by the thermal zone indicated on the heating/cooling certificate and insulation zone map. The manufacturer may provide the heating/cooling information and insulation zone map on the home's data plate. The design thermal zone in Ohio is thermal zone three. Manufactured homes designed for thermal zone one shall not be installed in Ohio. Used manufactured homes can be thermal zone two homes.

(4) A mobile home manufactured prior to July 1, 1974 shall be exempt from the requirement to provide thermal, wind and roof load information.

(5) A manufactured home built prior to July 1, 1974 shall be exempt from the requirement to provide thermal information.

(D) Moving manufactured home to location.

Refer to rule 4781-6-02.9 of the Administrative Code.

(E) Permits and alterations and on-site structures

Refer to rule 4781-6-02.9 and Chapter 4781-7 of the Administrative Code

Replaces: 4781-6- 02.1

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-03.2 Site preparation.

(A) Soil conditions

To help prevent settling or sagging, the foundation shall be constructed on firm, undisturbed soil or fill compacted to at least ninety per cent of its maximum relative density. In any site, all organic material such as grass, roots, twigs, and wood scraps shall be removed from the underneath of the manufactured home and in areas where footings are to be placed. In an existing site, all organic material such as grass, roots, twigs, and wood scraps shall have been removed in areas where footings were placed. The home site shall be graded or otherwise prepared to ensure adequate drainage in accordance with this rule.

(B) Soil classifications and bearing capacity.

The soil classification and bearing capacity of the soil shall be determined before the foundation is constructed and anchored. The soil classification and bearing capacity shall be determined by one or more of the following methods:

(1) Soil tests. Soil tests that are in accordance with generally accepted engineering practice;

(2) Soil records. Soil records of the applicable authority having jurisdiction;

(3) Soil classifications and bearing capacities. If the soil class or bearing capacity cannot be determined by test or soil records, but its type can be identified, the soil classification, allowable pressures, and torque values shown in the following table may be used;


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(4) The pocket penetrometer and ground auger torque tests shall be completed in accordance with proper test procedures and under proper testing conditions for use with auger style ground anchors; or

(5) If the soil appears to be composed of peat, organic clays, or uncompacted fill, or appears to have unusual conditions, a registered professional geologist, registered professional engineer, or registered architect must determine the soil classification and maximum allowable soil bearing capacity.

(C) Site drainage.

(1) Purpose. Drainage shall be provided to direct surface water away from the home and to prevent water build-up under the home and all vegetation shall be removed from the underneath of the manufactured home.

(2) The home site shall be graded as shown in figure 2A of rule 4781-6-02.2 of the Administrative Code, or other methods, such as a drain tile and automatic sump pump system, shall be provided to remove any water that may collect under the home.

(3) All drainage shall be diverted away from the home and shall slope a minimum of one-half inch per foot away from the foundation for the first ten feet. Where property lines, walls, slopes, or other physical conditions prohibit this slope, the site shall be provided with drains or swales or otherwise graded to drain water away from the structure.

(4) Sloped site considerations. The home, where sited, shall be protected from surface runoff from the surrounding area.

(5) Refer to paragraph (B)(3) of rule 4781-6-02.9 of the Administrative Code regarding the use of drainage structures to drain surface runoff.


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(6) Gutters and downspouts. If gutters and downspouts are installed, the runoff shall be directed a minimum of eighteen inches away from the home.

(7) Prohibited drainage. Roof drains and downspouts shall not be connected to the foundation system. They shall be independent and not interconnected.

(8) Concrete and masonry foundations. Drains shall be provided around all concrete or masonry foundations that retain earth and enclose habitable or usable spaces located below grade or unused spaces which are in wet areas. Drainage tiles, gravel or crushed stone drains, perforated pipe or other approved systems or materials shall be installed below the area to be protected and shall discharge by gravity or mechanical means to drain away from the home or into an approved drainage system. A drainage system is not required when the foundation is installed on well-drained ground or sand-gravel mixture soils according to standard soils classification. An additional interior drainage system may be required in especially wet areas.

(9) Concrete and masonry foundation damp-proofing. Foundation walls that retain earth and enclose habitable or useable spaces located below grade or unused spaces which are in wet areas shall be damp-proofed from the top of the footing to the finished grade. Except, a foundation shall not be required to be damp-proofed where a supplemental interior foundation drainage system is tied to a sump pump.

(10) Where a concrete or masonry wall is used, the crawlspace or basement slabs shall have a foundation drain that shall be separate from the perimeter drain until the point of discharge by gravity or mechanical means into an approved drainage system.

(D) Ground moisture control.

(1) Vapor retarder. If the space under the home is to be enclosed with solid skirting or other solid materials, a vapor retarder shall be installed on the ground, to cover the ground under the home. If the space under the home is to be enclosed with vented perforated skirting or other perforated materials, vapor retarder is not required.

(2) Vapor retarder material. A minimum of six mil polyethylene sheathing or its equivalent shall be used.

(3) Proper installation.

(a) The entire area under the home shall be covered with the vapor retarder as noted in this rule except for areas under open porches, decks, and open recessed entries. Joints in the vapor retarder shall be overlapped at least twelve inches and sealed.

(b) The vapor retarder may be placed directly beneath footings, or otherwise installed around or over footings placed at grade, and around anchors or other obstructions.

(c) Any voids or tears in the vapor retarder shall be repaired.

(d) Where a masonry exterior perimeter wall is installed, two inches of crushed stone, clean washed gravel or its equivalent shall cover the vapor barrier or be covered by the vapor barrier.

Replaces: 4781-6- 02.2

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-03.3 Foundations.

(A) General.

(1) Foundations for manufactured home installations shall be designed and constructed in accordance with this subpart and shall be based on site conditions, home design features, and the loads the home was designed to withstand as shown on the home's data plate.

(2) Foundation systems that are not pier and footing type configurations may be used when verified by engineering data and designed in accordance with this rule and consistent with the design loads of the MHCSS. Pier and footing specifications, that are different than those provided in this rule, such as block size, metal piers, section width, loads, and spacing, may be used when verified by engineering data that comply with this rule and are capable of resisting all design loads of the MHCSS.

(3) Details, plans, and test data shall be designed and certified by an Ohio registered professional engineer or registered architect, and shall not take the home out of compliance with the MHCSS.

(4) Alternative foundation systems. Alternative foundation systems or designs are permitted when they do not take the home out of compliance with MHCSS and when they are in accordance with either of the following:

(a) Engineered foundation systems or designs shall be manufactured and installed in accordance with their listings by a nationally recognized testing agency based on a nationally recognized testing protocol; or

(b) System designs shall be prepared by an Ohio registered professional engineer or a registered architect in accordance with acceptable engineering practice.

(B) Flood hazard areas.

(1) In flood hazard areas, the foundation, anchoring and support systems shall be capable of resisting loads associated with design flood and wind events, and homes shall be installed on foundation supports that are designed and anchored to prevent floatation, collapse or lateral movement of the structure. The manufactured home shall be installed in accordance with the manufacturer's instructions where available. If the foundation system being used is not covered by the manufacturer's instructions, the foundation system shall be designed by an Ohio registered professional engineer or registered architect.

(2) Where manufacturer's installation instructions do not address flood loads or flood hazard areas, the requirements of the authority having jurisdiction, the floodplain authority. FEMA 85. 44 C.F.R. 60.3(a) to (e) (Feb. 8. 19841 other provisions of 44 C.F.R.60 referenced by those paragraphs. Chapter 1521. of the Revised Code, and division 1501:22 of the Administrative Code shall govern.

(C) Piers.

(1) General. The piers used shall be capable of transmitting the vertical live and dead loads to the footings or foundation.

(2) Acceptable piers, materials speciftication.

(a) Piers are permitted to be concrete blocks; hardwood or other listed and approved shims, spacers or caps or with pressure-treated wood shims, spacers or caps with a water borne preservative, in accordance with American wood preserver's association (AWPA) "Standard Ul for Use Category 4B" ground contact applications; or adjustable metal or concrete piers.

(b) Manufactured piers shall be listed or labeled for the required vertical load capacity, and, where required by design, for the appropriate horizontal load capacity. Manufactured piers shall be installed with an approved footing and in accordance with their listing or pier manufacturer's installation instructions.

(3) Design requirements.

(a) Load bearing capacity. The load bearing capacity for each pier shall be designed to included consideration for the dimensions of the home, the design dead and live loads, the spacing of the piers, and the way the piers are used to support the home.

(b) Center beam/mating wall support shall be required for multi-section homes and designs shall be consistent with tables 3.2 and 3.3 of this rule and figures 3E. 3F and 3G of this rule.

(4) Pier loads.

(a) Design support configurations and footing sizes for the pier loads, pier spacing, and roof live loads shall be in accordance with tables 3.1. 3.2. and 3.3 and the MHCSS. Other pier and footing designs are permitted in accordance with the provisions of Chapter 4781. of the Revised Code.


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(b) Manufactured piers shall be rated at least to the loads required to safely support the dead and live loads as required by this rule and the installation instructions for those piers shall be consistent with tables 3.1. 3.2 and 3.3 of this rule.

(D) Pier configuration.

(1) Concrete blocks. Installation instructions for concrete block piers shall be developed in accordance with the following provisions and shall be consistent with figures 3 A and 3B of this rule.

(a) Load-bearing concrete blocks meeting ASTM C-90 shall be used and shall have nominal dimensions of at least eight inches by eight inches by sixteen inches and an average net area minimum compressive strength for three units of nineteen hundred psi;

(b) The concrete blocks shall be stacked with their hollow cells aligned vertically: and

(c) When piers are constructed of blocks stacked side by side, each layer shall be at right angles to the preceding one, as shown in figure 3B of this rule.

(2) Caps.

(a) Structural loads shall be evenly distributed across capped hollow block piers, as shown in figures 3 A and 3B of this rule.

(b) Caps shall be solid concrete or masonry at least four inches in nominal thickness, or hardwood lumber at least two inches nominal in thickness; or be corrosion-protected minimum one-half inch thick steel; or be of other listed materials. ACQ treated lumber shall not have direct contact with I-beams. Roofing felt, six mil plastic, or equal may be used as a barrier between ACQ caps and the I-beam.

(c) All caps shall be of the same length and width as the piers on which they rest.

(d) When split caps are used on double-stacked blocks, the caps shall be installed with the long dimension across the joint in the blocks below.

(3) Gaps. Any gaps that occur during installation between the main chassis beam and foundation support system shall be filled.

(a) Nominal four inch by six inch by one inch shims are permitted to be used to level the home and fill any gaps between the base of the main chassis beam and the top of the pier cap.

(b) Shims shall be used in pairs as shown in figures 3 A and 3B of this rule and shall be driven in tightly so that they do not occupy more than one inch of vertical height.

(c) Hardwood plates no thicker than two inches nominal in thickness or four inches nominal concrete block must be used to fill any remaining vertical gaps.

(d) Gap fill materials, not made of masonry, shall not exceed three inches, by a combination of nominal two by eight wood block and one set of one inch wood wedges or shims.

(4) Manufactured pier heights. Manufactured pier heights shall be selected so that the adjustable risers do not extend more than two inches when finally positioned.

(E) Clearance under homes.

(1) A minimum clearance of twelve inches shall be maintained between the lowest member of the main frame (I-beam or channel beam) and the grade under all areas of the home. No more than twenty-five per cent of the lowest member of the main frame of the home shall be less than eighteen inches above grade.

(2) A minimum clearance of eight inches shall be maintained between the bottom of the lowest wood frame member and the exterior grade.

(F) Design procedures for concrete block piers.

(1) Frame piers less than thirty-six inches high.

(a) Frame piers less than thirty-six inches high shall be permitted if constructed of single, open, or closed-cell concrete blocks, eight inches by eight inches by sixteen inches, when the design capacity of the block is not exceeded.

(b) The frame piers shall be installed so that the long sides are at right angles to the supported I-beam, as shown in figure 3 A of this rule.

(c) The concrete blocks shall be stacked with their hollow cells aligned vertically and shall be positioned at right angles to the footings.

(d) Horizontal offsets from the top to the bottom of the pier shall not exceed one-half inch.

(e) Mortar is not required unless specified in the installation instructions or required by an Ohio registered professional engineer or registered architect. Where mortar is required, minimum type S mortar shall be used.


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(2) Frame piers thirty-six inches to sixty-seven inches high and corner piers.

(a) All frame piers between thirty-six and sixty-seven inches high and corner piers over three blocks high shall be constructed out of double, interlocked concrete blocks as shown in figure 3B of this rule, when the design capacity of the block is not exceeded. Mortar is not required for concrete block piers unless otherwise specified in the installation instructions or required by an Ohio registered professional engineer or registered architect. Where mortar is required minimum type S mortar shall be used.

(b) Horizontal offsets from the top to the bottom of the pier shall not exceed one-half inch.

(3) Pier tolerances. Piers shall be plumb and level with tolerances per figure 3D of this rule.


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(4) All piers over sixty-seven inches high. Unless the manufacturer's installation instructions specifically contains a design, piers over sixty-seven inches high shall be designed by an Ohio registered professional engineer or registered architect in accordance with acceptable engineering practice. Mortar is not required for concrete block piers unless otherwise specified by the design. Where mortar is required, minimum type S mortar shall be used.

(G) Perimeter support piers

(1) Piers required at mate-line supports, perimeter piers, and piers at exterior wall openings shall be permitted to be constructed of single open-cell or closed-cell concrete blocks, with nominal dimensions of eight inches by eight inches by sixteen inches, to a maximum height of fifty-four inches, as shown in figure 3A of this rule, when the design capacity of the block is not exceeded.

(2) Piers used for perimeter support shall be installed with the long dimension parallel to the perimeter rail.

(H) Manufactured piers.

Manufactured piers shall be listed and labeled and installed to the pier manufacturer installation instructions. See this rule for additional requirements.

(I) Piers over sixty-seven inches high.

Piers over sixty-seven inches high must be designed by an Ohio registered professional engineer or registered architect, in accordance with acceptable engineering practice.

(J) Pier location and spacing.

(1) The location and spacing of piers depends upon the dimensions of the home, the live and dead loads, the type of construction (single- or multi-section! I-beam size, soil bearing capacity, footing size, and such other factors as the location of doors or other openings.

(2) Mate-line and column pier supports shall be in accordance with this rule and consistent with figures 3E to 3G of this rule.


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(3) Piers supporting the frame shall be no more than twenty-four inches from both ends and not more than ninety-six inches from center to center under the main rails. If the piers supporting the frame is more than ninety-six inches, but not more than one hundred twenty inches, from the center to center under the main rails, the increased dimensions shall be approved by an Ohio professional engineer or registered architect or in accordance with the manufactured installation manual.

(4) Pier support locations. Pier support locations and spacing shall be presented to be consistent with figures 3H and 31 of this rule, as applicable, unless alternative designs are provided by a professional engineer or registered architect in accordance with acceptable engineering practice.

(K) Required perimeter supports. Perimeter pier or other supports shall be located as follows:

(1) On both sides of side wall exterior doors (such as entry, patio, and sliding glass doors^) and any other side wall openings of forty-eight inches or greater in width, and under load-bearing porch posts, factory installed fireplaces, and wood stoves.

(2) Other permiter supports shall be:

(a) Located in accordance with table 3.2 of this rule.

(b) Provided by other means such as additional outriggers or floor joists. When this alternative is used, the designs required by this rule shall consider the additional loads in sizing the pier and footing supports under the main chassis beam.

(L) Footings.

(1) Materials approved for footings shall provide equal load-bearing capacity and resistance to decay as required by this rule. Footings shall be placed on undisturbed soil or fill compacted to ninety per cent of maximum relative density. A footing shall support every pier.


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(2) Acceptable types of footings.

(a) Concrete. Footings are to be either:

(i) Four inch nominal precast concrete pads meeting or exceeding "ASTM C 90-02. Standard Specification for Load Bearing Concrete Masonry Units." without reinforcement, with at least a twenty-eight day compressive strength of three thousand pounds per square inch (psi);

(ii) Six inch minimum poured-in-place concrete pads, slabs, or ribbons with at least a twenty-eight day compressive strength of three thousand pounds per square inch (psi). Cast-in-place concrete footings may also require reinforcing steel based on acceptable engineering practice, the design loads, and site specific soil conditions. Poured footings shall be level and screeded smooth; or

(iii) Footing tolerances. Improper footings as illustrated in figure 3J shall not be approved.


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(b) Engineered plastic composite footing pads.

(i) Engineered plastic composite footing pads shall be permitted if used in accordance with the manufacturer installation instructions and/or specification sheet of the specific engineered plastic composite pad being used. The use of engineered plastic composite pads must be used in conjunction with solid perimeter skirting in accordance with paragraphs (D)(1) to (D)(4) and (E)(1) to (E)(6) of rule 4781-6-02.5 of the Administrative Code.

(ii) Engineered plastic composite footing pads shall be listed or labeled for the required load capacity and installed in accordance with their listing.

(c) Placement in freezing climates. Footings placed in freezing climates shall be designed using methods and practices that prevent the effects of frost heave by one of the following methods:

(i) Conventional footings shall be placed below the frost line depth for the site unless an insulated foundation or monolithic slab is used in this rule. When the frost line depth is not available from the authority having jurisdiction, a registered professional engineer, registered architect, or registered geologist shall be consulted to determine the required frost line depth for the manufactured home site.

(ii) Monolithic slab systems. A monolithic slab may be permitted above the frost line when all relevant site-specific conditions including soil characteristics, site preparation, ventilation, and insulative properties of the under floor enclosure are considered and anchorage requirements as set for in rule 4781-6-02.4 of the Administrative Code and the monolithic slab system shall be designed by an Ohio registered professional engineer or registered architect:

(a) In accordance with acceptable engineering practice to prevent the effects of frost heave; or

(b) In accordance with ASCE/SEI 32-01. The design shall accommodate the anchorage requirements set out in rule 4781-6-02.4 of the Administrative Code.

(iii) Insulated foundations. An insulated foundation shall be permitted above the frost line, when all relevant site-specific conditions including soil characteristics, site preparation, ventilation, and insulative properties of the under floor enclosure are considered and the foundation is designed by an Ohio registered professional engineer or registered architect:

(a)In accordance with acceptable engineering practice to prevent the effects of frost heave: or

(b)In accordance with ASCE/SEI 32-01. The design shall accommodate the anchorage requirements set out in rule 4781-6-02.4 of the Administrative Code.

(d) Sizing of footings. The sizing of footings depends on the load-bearing capacity of the soil, footings, and the piers as set forth in this rule.

(e) The size and capacity for un-reinforced cast-in-place footings shall be in accordance with figure 3K of this rule.


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(M) Combination systems.

Support systems that combine both load-bearing capacity shall also be sized and designed for all applicable design loads.

(N) Permanent foundations.

Permanent foundation shall:

(1) Have a continuous perimeter wall that complies with requirements of HUD's September 1996 permanent foundation guide for manufactured homes;

(2) Have footings that are either below the frost line or protected from frost heave;

(3) Tongue wheels, axles, and hitches shall be removed from under the manufactured home; and

(4) Conform to Chapter 4781-6 of the Administrative Code.

(O) Stable foundation means

Foundations not to frost depth but protect against frost heave by the installation properties of the under home enclosure and shall conform to Chapter 4781-6 of the Administrative Code.

(P) Temporary foundation means:

Footing not below frostline or protected from frost heave and shall be permitted on private property for no more than six months, two six month extensions may be granted by the authority having jurisdiction upon written request if the installations is in accordance with Chapter 4781-6 of the Administrative Code.

(Q) Special snow load conditions.

(1) In general, foundations for homes, which by special request of the home owner are designed for and located in areas with roof live loads greater than forty per square foot shall be designed by the manufacturer for the special snow load conditions in accordance with acceptable engineering practice. Where site or other conditions prohibit the use of the manufacturer's instructions, a registered professional engineer or registered architect shall design the foundation for the special snow load conditions.

(2) Ramadas. A ramada is any freestanding roof or shade structure, installed or erected above a manufactured home or any portion thereof. Ramadas may be used and shall be self- supporting except that any connection to the home shall be for weatherproofing only.

Replaces: 4781-6- 2.3

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-03.4 Anchorage against wind.

(A) Anchoring instructions.

(1) After blocking and leveling, the manufactured home shall be secured against the wind by use of anchor assembly type installations or by connecting the home to the alternative foundation system. See rule 4781-6-02.3 of the Administrative Code.

(2) For anchor assembly type installations, the installation shall ensure the manufactured home is secured against the wind as described in this section. Installations not completed in accordance with the manufactured installation instructions shall meet these standards or be designed by an Ohio registered professional engineer or registered architect in accordance with acceptable engineering practice, the design loads of the MHCSS and rule 4781-6-02.3 of the Administrative Code.

(3) All anchoring and foundation systems shall be capable of meeting the loads that the manufactured home was designed to withstand required by MHCSS and rule 4781-6-02.3 of the Administrative Code and that the manufactured home was designed to withstand as shown on the home's data plate. However, if a home is placed in a zone which is less than the zone on the data plate then the anchoring and foundation requirements may be designed to the zone in which the home is placed; unless specifically excluded by the manufacturer of the home.

(4) When an Ohio registered professional engineer or registered architect designs anchoring, the installation instructions are to include at least the following information and details for anchor assembly type instructions:

(a) The maximum spacing for installing diagonal ties and any required vertical ties or straps to ground anchors;

(b) The minimum and maximum angles or dimensions for installing diagonal ties or straps to ground anchors and the main chassis members of the manufactured home;

(c) Requirements for connecting the diagonal ties to the main chassis members of the manufactured home. If the diagonal ties are attached to the bottom flange of the main chassis beam, the frame shall be designed to prevent rotation of the beam;

(d) Requirements for longitudinal and mating wall tie downs and anchorage;

(e) The method of strap attachment to the main chassis member and ground anchor; including provisions for swivel-type connections;

(f) The method of strap attachment to the main chassis member and ground anchor; including provisions for swivel-type connections;

(g) As applicable, the requirements for sizing and installation of stabilizer plates.

(B) Ground anchor installations.

(1) Specifications for tie-down straps and ground anchors.

(a) Ground anchors.

Ground anchors shall be listed, be provided with protection against weather deterioration and corrosion at least equivalent to that provided by a coating of zinc on steel of not less than 0.30 ounces per square foot of surface coated, and be capable of resisting a minimum ultimate load of four thousand seven hundred twenty-five pounds and a working load of three thousand one hundred fifty pounds, unless reduced capacities are noted in accordance with note 11 of table 4.1 of this rule or note 12 of tables 4.2 and 4.3 of this rule. The ultimate load and working load of ground anchors and anchoring equipment shall be determined by a registered professional engineer, registered architect, or tested by a nationally recognized third party testing agency in accordance with a nationally recognized testing protocol.

(b) Tie-down straps.

A one and one-quarter inch by thirty-five hundreds of an inch or larger steel strapping conforming to ASTM D 3953-97, "Standard Specification for Strapping, Flat Steel and Seals, Type 1 Grade 1, Finish B," with a minimum total capacity of four thousand seven hundred twenty-five pounds and a working capacity of three thousand one hundred fifty pounds shall be used. The tie-down straps shall be provided with protection against weather deterioration and corrosion at least equivalent to that provided by a coating of zinc on steel of not less than 0.30 ounces per square foot of surface coated. Slit or cut edges of coated strapping need not be zinc coated.

(2) Number and location of ground anchors.

(a) Ground anchor and anchor strap spacing shall be:

(i) No greater than the spacing shown in tables 4.1 to 4.3 of this rule and figures 4A and 4B of this rule; or

(ii) Designed by an Ohio registered engineer or architect in accordance with acceptable engineering practice, Chapter 4781-6 of the Administrative Code, and the requirements of the MHCSS.


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(b) Longitudinal anchoring. Manufactured homes in Ohio are not required to be stabilized against the wind in the longitudinal direction unless specified in the manufacturer's installation manual or by an Ohio registered professional engineer or registered architect. An Ohio registered professional engineer or registered architect shall design alternative longitudinal anchoring methods in accordance with acceptable engineering practice.


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(c) The requirements in this rule shall be used to determine the maximum spacing of ground anchors and their accompanying anchor straps based on the soil classification determined in accordance with rule 4781-6-02.2 of the Administrative Code.

(i) The installed ground anchor size (length) shall be for the listed soil class.

(ii) All ground anchors shall be installed in accordance with their listing or certification and the ground anchor manufacturer installation instructions.

(iii) Plate size and type. The size and type of stabilizer plate to be provided shall be determined by the manufacturer of the anchor in accordance with the ground anchor listing or certification. Metal stabilizer plates shall be provided with protection against weather deterioration and corrosion at least equivalent to that provided by a coating of zinc on steel of not less than 0.30 ounces per square foot of surface coated. Alternatively, ABS stabilizer plates may be used when listed and certified for such use.

(3) Each ground anchor shall be manufactured and provided with installation instructions in accordance with its listing or certification. A nationally recognized testing agency shall list, or a registered professional engineer or registered architect shall certify the ground anchor for use in a classified soil (see rule 4781-6-02.2 of the Administrative Code) based on a nationally recognized testing protocol.


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(C) Sidewall. over-the-roof. mate-line, and shear wall straps.

If sidewall. over-the roof, mate-line, or shear wall straps are installed on the home, they shall be connected to an anchoring assembly.

(D) Sever climatic conditions.

In frost-susceptible soil locations, ground anchor augers shall be installed below the frost line unless the foundation system is frost protected to prevent the effects of frost heave in accordance with acceptable engineering practice and rule 4781-6-02.3 of the Administrative Code.

(E) Flood hazard areas.

In flood hazard areas, the piers, anchoring, and support systems shall comply with FEMA 85 requirements and shall be capable of resisting all loads associated with design flood and wind events or combined flood and wind events. See rule 4781-6-02.1 of the Administrative Code. In manufactured home parks, manufactured homes shall be installed in accordance with Chapter 4781. of the Administrative Code.

Replaces: 4781-6- 02.4

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 1/1/2010

4781-6-03.5 Optional features.

(A) Features added during installation.

Optional equipment or features shall not take the home out of conformance with the requirements of the MHCSS and these standards.

(B) Expanding rooms.

The support and anchoring systems for expanding rooms shall be installed in accordance with designs provided by the home manufacturer or prepared by a registered professional engineer or registered architect in accordance with acceptable engineering practice.

(C) Optional appliances.

(1) Comfort cooling systems. When not provided and installed by the home manufacturer, comfort cooling systems shall be installed according to the appliance manufacturer's installation instructions.

(a) Air conditioners. Air conditioning equipment shall be listed or certified by a nationally recognized testing agency for the application for which the unit is intended and installed in accordance with the terms of its listing or certification.

(i) Energy efficiency.

(a) Site-installed central air conditioning equipment shall be sized to meet the home's heat gain requirement, in accordance with chapter twenty-eight of the 2007 ASHRAE "Handbook of Fundamentals" or ACCA "Manual J, Residential Cooling Load," eighth edition.

(b) The BTU per hour rated capacity of the site-installed air conditioning equipment shall not exceed the air distribution system's rated BTU per hour capacity as shown on the home's compliance certificate.

(ii) Circuit rating. If a manufactured home is factory provided with an exterior outlet to energize heating and/or air conditioning equipment, the branch circuit rating on the tag adjacent to this outlet shall be equal to or greater than the minimum circuit amperage identified on the equipment rating plate.

(iii) A-coil units.

(a) A-coil air conditioning units shall be compatible and listed for use with the furnace in the home and installed in accordance with the appliance manufacturer's instructions.

(b) The air conditioner manufacturer instructions shall be followed.

(c) All condensation shall be directed beyond the perimeter of the home by means specified by the equipment manufacturer.

(b) Heat pumps. Heat pumps shall be listed or certified by a nationally recognized testing agency for the application for which the unit is intended and installed in accordance with the terms of its listing or certification.

(2) Fireplace and wood-stove chimneys and air inlets. Fireplace and wood-stove chimneys and air inlets shall be listed for use with manufactured homes and shall be installed in accordance with their listings.

(3) Appliance venting.

(a) All heat producing appliances except ranges and ovens shall be vented to the exterior of the home.

(b) When the vent exhausts through the floor, the vent shall not terminate under the home and shall extend to the home's exterior and through any skirting or foundation wall that may be installed.

(4) Flood hazard areas.

(a) Outside appliances. Appliances installed on the manufactured home site shall be anchored and elevated to or above the same elevation as the minimum flood elevation of the lowest floor of the home.

(b) Air inlets and exhausts. Appliance air inlets and exhausts shall be located at or above the same elevation as the minimum flood elevation of the lowest floor of the home.

(5) Clothes dryer exhaust system duct. A clothes dryer exhaust duct system shall conform with and be completed in accordance with the appliance manufacturer instructions and rule 4781-6-02.6 of the Administrative Code. The vents shall exhaust to the exterior of the home, beyond any perimeter skirting installed around it, as shown in figure 5A of this rule.


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(D) Skirting.

(1) Skirting, if used, shall be of weather-resistant materials.

(2) Skirting shall not be attached in a manner that can cause water to be trapped between the siding and trim or forced up into the wall cavities trim to which it is attached.

(3) All wood skirting within six inches of the ground shall be pressure treated in accordance with AWPA "Standard U1 for Use Category 4A, Ground Anchor Contact Applications" or be naturally resistant to decay and termite infestations.

(4) Skirting shall not be attached in a manner that impedes the contraction and expansion characteristics of the home's exterior covering and siding.

(E) Crawlspace ventilation.

(1) A crawlspace with solid skirting shall be provided with ventilation openings. The minimum net area of ventilation openings must not be less than one square foot for every one hundred fifty square feet of the home's floor area. The total area of ventilation openings may be reduced to one square foot for every fifteen hundred square feet of the home's floor area, where uniform six mil polyethylene vapor retarder or other acceptable vapor retarder required under rule 4781-6-02.2 of the Administrative Code is placed on the ground surface beneath the entire floor area of the home with a minimum of four vents per enclosed crawlspace area.

(2) Ventilation openings shall be placed as high as practicable above the ground and located on at least two opposite sides to provide cross-ventilation. The vents shall be located within three feet of the corners of the home and unobstructed.

(3) Ventilation openings shall be covered for their full height and width with a perforated corrosion and weather resistant covering that is designed to prevent the entry of rodents. In areas subject to freezing, the coverings for the ventilation openings shall be of the adjustable type, permitting them to be in the open or closed position, depending on the climatic conditions.

(4) Access opening(s) not less than eighteen inches in width and twenty four inches in height and not less than three square feet in area shall be provided and shall be located so that any utility connections located under the home are accessible.

(5) Condensate drains, water heater drains, and furnace drains shall be provided when specified by the HVAC manufacturer's installation instructions and in the absence of manufacturer's installation instructions, where condensate is discharged from equipment. All condensate pans and collectors shall have condensate drains. HVAC condensation drains shall pass to the outside or into another approved drain which passes to the outside of the home. Drains shall be supported in accordance with paragraph (D) of rule 4781-6-02.6 of the Administrative Code.

(6) Dryer vents and combustion air inlets shall pass through the skirting to the outside of the home. See figure 5A "Dryer Exhaust system" of the Administrative Code.

Replaces: 4781-6- 02.5

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-03.6 Ductwork and plumbing and fuel supply systems.

(A) Field assembly.

Home manufacturers shall provide specific installation instructions for the proper field assembly of manufacturer-supplied and shipped loose ducts, plumbing, and fuel supply system parts that are necessary to join all sections of the home and shall be designed to be located underneath the home. The installation instructions shall be designed in accordance with applicable requirements of the MCHSS. Where manufacturer's installation instructions are not available or do not address an element of the installation, the Ohio plumbing code, the Ohio mechanical code, and this rule shall govern.

(B) Utility connections.

Refer to rule 4781-6-02.9 of the Administrative Code.

(C) Water supply.

(1) Crossover. Multi-section homes with plumbing in both sections require water-line crossover connections to join all sections of the home.

(2) Maximum supply pressure and reduction. When the local water supply pressure exceeds eighty pounds per square inch to the manufactured home, a pressure-reducing valve shall be installed.

(3) Mandatory shutoff valve.

(a) An identified and accessible shutoff valve shall be installed between the water supply and the inlet.


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(b) The water riser for the shut-off valve connection shall be located underneath or adjacent to the manufactured home with the shut-off valve accessible within three feet of the point where the water supply enters the perimeter of the manufactured home or emerges from underground.

(c) The shutoff valve shall be a full-flow gate or ball valve, or equivalent valve.

(4) Freezing protection. Water line crossovers completed during installation shall be protected from freezing.

(a) If subject to freezing temperatures, the water connection shall be wrapped with insulation or otherwise protected to prevent freezing.

(b) In areas subject to freezing or subfreezing temperatures, exposed sections of water supply piping, shutoff valves, pressure reducers, and pipes in water heater compartments shall be insulated or otherwise protected from freezing.

(c) Use of pipe heating cable. Only pipe heating cable listed for the intended use shall be permitted to be used. It shall be fused or used with a fused plug and shall be installed in accordance with the cable manufacturer installation instructions.

(5) Testing procedures.

(a) The water system shall be inspected and tested for leaks after completion at the site in accordance with the manufacturer's installation instructions. Where no manufacturer's installation manual test procedure is available, the test shall be performed in accordance with testing procedures provided on forms approved by the commission.

(b) The water heater shall be disconnected when using an air-only test to prevent damage to the water heater for pressures above eighty psi.

(D) Drainage system.

(1) Crossovers. Multi-section homes with plumbing in more than one section require drainage system crossover connections to join all sections of the home.

(2) Assembly and support. If portions of the drainage system were shipped loose because the portions were necessary to join all sections of the home and designed to be located underneath the home, the portions shall be installed and supported in accordance with manufacturer's home installation instructions or OMHC rules.

(3) Proper slopes. Drains shall be completed in accordance with manufacturer's home installation instructions or OMHC rules.

(a) Drain lines shall not slope less than one-quarter inch per foot unless otherwise noted on the schematic diagram, as shown in figure 6.1 of this rule.

(b) A slope of one-eighth inch per foot may be permitted when a clean out is installed at the upper end of the run.

(4) Testing procedures.

The drainage system shall be inspected and tested for leaks after completion at the site in accordance with the manufacturer's installation instructions. Where no manufacturer's installation manual test procedure is available, the test shall be performed in accordance with testing procedures provided on forms approved by the commission.

(E) Fuel supply system.

(1) Proper supply pressure. The gas piping system in the home is designed for a pressure that is at least ten inches of water column [ 5.8 ounces per square inch or 0.36 psi] and not more than fourteen inches of water column [eight ounces per square inch 0.5 psi]. If gas from any supply source exceeds, or could exceed this pressure, a regulator shall be installed.

(2) Crossovers.

Multi-section homes with fuel supply piping in both sections require crossover connections to join all sections of the home.

(3) Testing procedures. The gas system shall be inspected and tested for leaks after completion at the site in accordance with the manufacturer's installation instructions. Where no manufacturer's installation manual test procedure is available, the test shall be performed in accordance with testing procedures on forms approved by the commission.

(F) Ductwork connections.

(1) Crossovers. Multi-section homes with ductwork in more than one section require crossover connections to complete the duct system of the home. All ductwork connections, including duct collars, shall be sealed to prevent air leakage. Galvanized metal straps or tape and mastics listed to UL181 A or UL181 B shall be used around the duct collar and secured tightly to make all connections.

(2) If metal straps are used, the metal straps shall be secured with galvanized sheet metal screw.

(3) Metal ducts shall be fastened to the collar with a minimum of three galvanized sheet metal screws equally spaced around the collar.

(4) Air conditioning or heating ducts shall be installed in accordance with applicable requirements of the duct manufacturer installation instructions.

(5) The duct shall be suspended or supported above the ground by straps or other approved means that are spaced at a maximum distance not to exceed four feet or as otherwise permitted by the installation instructions. When straps are used to support a flexible type duct, the straps shall be at least three-fourths inch wide and shall be installed such that the straps cannot slip between any two spirals and arranged under the floor to prevent compression or kinking in any location, as shown in figures 6A and 6B of this rule.


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(6) Crossover ducts outside the thermal envelope of the manufactured home, in uninsulated basements or uninsulated crawlspaces, shall be insulated to an R-value of four or better in accordance with ASTM C-518, UL181 for flexible ducts or equal thermal protection and covered with a vapor retarder.

(7) In-floor or ceiling crossover duct connections shall be installed and sealed to prevent air leakage.

(8) Support of crossover ducts does not include resting loose on rocks, brick, blocks, or other materials resting on the ground.

(9) Floor joists shall not be notched or cut into in anyway during the installation of on-site ductwork.

(10) Repair any tears in the outlining of ductwork and cover all exposed metal surfaces, boots, and connections with insulation with a minimum R-value of four and a vapor barrier.

Replaces: 4781-6- 02.6

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-03.7 Electrical systems and equipment.

(A) Electrical crossovers

Multi-section homes with electrical wiring in more than one section require crossover connections to join all sections of the home. The crossover shall be completed in accordance with the directions provided in the installation instructions.

(B) Miscellaneous lights and fixtures.

(1) When the home is installed, exterior lighting fixtures, ceiling-suspended (paddle) fans, and chain-hung lighting fixtures shall be permitted to be installed in accordance with their listings, MHCSS and these standards.

(2) Grounding.

(a) All the exterior lighting fixtures and ceiling fans installed per MHCSS and these standards shall be grounded by a fixture-grounding device or by a fixture-grounding wire.

(b) For chain-hung lighting fixtures, as shown in figure 7A of this rule, both a fixture-grounding device and a fixture-grounding wire shall be used. The identified conductor shall be the neutral conductor.


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(3) Where lighting fixtures are mounted on combustible surfaces such as hardboard, a limited combustible or noncombustible ring, as shown in figures 7A and 7B of this rule, shall be installed to completely cover the combustible surface exposed between the fixture canopy and the wiring outlet box.


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(4) Exterior Lights.

(a) The junction box covers shall be removed and wire-to-wire connections shall be made using listed wire connectors.

(b) Wires shall be connected in compliance with the national electric (NEC) 2008.

(c) The wires shall be pushed into the box, and the lighting fixture shall be secured to the junction box.

(d) The lighting fixture shall be caulked around its base to ensure a watertight seal to the sidewall.

(e) The light bulb shall be installed and the globe shall be attached.

(5) Ceiling fans.

(a) Ceiling-suspended (paddle) fans shall be connected to a junction box listed for ceiling fan application and installed with the trailing edges of the blades at least six feet four inches above the finished floor.

(b) The wiring shall be connected in accordance with the product manufacturer installation instructions.

(6) Testing.

(a) After completion of all electrical wiring and connections, including crossovers, electrical lights, and ceiling fans, the electrical system shall be inspected and tested. Testing shall be done in accordance with the manufacturer's installation instructions. Where no manufacturer's installation manual test procedure is available, the test shall be performed in accordance with testing procedures provided on forms approved by the commission.

(b) Each manufactured home shall be subjected to the following tests:

(i) An electrical continuity test to ensure that metallic parts are effectively bonded;

(ii) Operational tests of all devices and utilization equipment except water heaters, electric ranges, electric furnaces, dishwashers, clothes washers/dryers, and portable appliances to demonstrate that they are connected and in working order; and

(iii) For electrical equipment installed or completed during installation, electrical polarity checks shall be completed to determine that connections have been made properly. Visual verification is an acceptable electrical polarity check.

(C) Smoke alarms.

Smoke alarms shall be functionally tested in accordance with applicable requirements of the smoke alarm manufacturer instructions and shall be consistent with this rule. Where no manufacturer's installation manual or alarm manufacturer test procedure is available, the test shall be performed in accordance with testing procedures provided on forms approved by the commission. All homes shall be required to have operational smoke detectors per NFPA recommendations.

(D) Telephone and cable television.

Refer to rule 4781-6-02.9 of the Administrative Code for considerations pertinent to installation of telephone and cable television.

(E) Except where otherwise specified in these standards, electrical supply, electrical systems, and equipment installed on site for manufactured home in a manufactured home park and a single site (private property) shall comply with the national electric code (NEC) 2008, Article 550.

(F) On-site wiring methods not included in the manufacturer's installation instructions shall comply with the requirements of the national electric code (NEC) 2008 and shall be inspected by a state certified electrical safety inspector (ESI) of record certified by the board of building standards or a licensed electrical contractor whose name is on the license issued under Chapter 4740. of the Revised Code.

(G) Electrical service, connectors and feeders shall be inspected by a state certified electrical safety inspector (ESI) of record certified by the board of building standards whose name is on the license issued under Chapter 3783. of the Revised Code.

Replaces: 4781-6- 02.7

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-03.8 Exterior and interior close-up.

(A) Final leveling of a manufactured home.

The manufactured home shall be leveled before completion of the installation. A home shall be considered level when no more than a quarter-inch difference exists between any two adjacent piers and no more than one-half inch difference exists between any point on the frame of the home to any comparable point on the frame on the opposite side or end of the home. Where two sections are joined at the marriage line, the maximum tolerance at the floor between the sections shall not exceed one-quarter inch vertical difference in height.

(B) Exterior close-up.

(1) Exterior siding and roofing necessary to join all sections of the home shall be installed according to the product manufacturer installation instructions and shall be fastened in accordance with the designs and manufacturer instructions and consistent with this rule. Exterior close-up strips/trim shall be fastened securely and sealed with exterior sealant (see figure 8A of this rule).


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(2) Joints and seams. All joints and seams in exterior wall coverings that were disturbed during location of the home shall be made weatherproof.

(3) Prior to installing the siding, the polyethylene sheeting covering exterior walls for transit shall be completely removed.

(4) Holes in the roof made in transit or setup shall be made weatherproof and sealed with a sealant or other material that is suitable for use with the roofing materials in which the hole is made.

(5) Mate-line gasket. The installer shall use the home manufacturer's materials and designs for mate-line gaskets or other methods designed to resist the entry of air, water, water vapor, insects, and rodents at all mate-line locations exposed to the exterior when available. Where the mate-line gasket material is not available from the manufactured home manufacturer, two inch foam sealed inside a vapor barrier sheathing type gasket, or one inch by four inch fiberglass roll, a batt or its equivalent shall be installed in accordance with Figure 8B below.


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(6) Hinged roofs and eaves. Hinged roofs and eaves shall be completed during installation so as to comply with MHCSS and these standards. However, some hinged roofs may be subject to specific on-site or alternative construction requirements issued separately by HUD. Generally, hinged roof homes are not subject to such special requirements as long as:

(a) The homes are designed to be located in wind zone one;

(b) The completed hinged roof pitch is less than seven in twelve; and

(c) Fuel burning appliance flue penetrations are not above the hinge.

(C) Structural interconnection of multi-section homes.

(1) For multi-section homes, structural interconnections along the interior and exterior at the mate-line are necessary to join all sections of the home.

(2) The interconnections shall be completed in accordance with the manufactured home installation manual or, if not available, these standards to ensure a completely integrated structure.

(3) Upon completion of the exterior close-up, no gaps shall be permitted between the structural elements being interconnected along the mate-line of multi-section homes. However, prior to completion of the exterior close-up, minor gaps that do not exceed one inch shall be permitted between structural elements provided the gaps are closed before completion of close-up, the home sections are in contact with each other, and the mating gasket is providing a proper seal. Gaps greater than one-fourth inch shall be shimmed tight, and fastener lengths used to make connections between the structural elements shall be increased to provide adequate penetration into the receiving member. Gaps between one inch and one-fourth inch in the walls or floor shall be filled with plywood shims or its equivalent.

(4) Multi-section homes with no manufacturer's installation instructions shall be assembled by lagging the floor rim joist approximately center between the floor joists not to exceed twenty-four inches on centers. The lag bolt shall be a minimum three-eighths inch by five inches lag bolt or screw with a standard three eighths inch flat washer.

(5) Multi-section homes with no manufacturer's installation instructions shall be connected at the roof with one and one-half inch wide perforated strapping connecting one rafter to the opposite rafter, affixed with three inch screws, two inch on each side of the ridge. Strapping shall be concealed by the ridge cap. Lags shall not be substituted for the strapping and screws unless the dimensional lumber to be joined by the lags is of sufficient size to accept the lags or required by an Ohio registered professional engineer or registered architect.

(6) Multi-section homes with no manufacturer's installation instructions shall be connected at the end walls with a number ten screw, four and one-half inches or approved equal, toe screwed every sixteen inches alternate sides.

(D) Bottom board repair.

(1) The bottom board covering shall be inspected for any loosening or areas that might have been damaged or torn during installation or transportation. Any missing insulation shall be replaced prior to closure and repair of the bottom board.

(2) Any splits or tears in the bottom board shall be resealed with bottom board fabric tape or patches in accordance with methods provided in the manufacturers installation instructions. Duct tape shall not be used to repair bottom board.

(3) Plumbing P-traps shall be checked to be sure they are well insulated and covered.

(4) All edges of repaired bottom board areas shall be taped with bottom board fabric tape or otherwise equivalently sealed.

(E) Interior close-up.

(1) All shipping, blocking, strapping, or bracing shall be removed from appliances, windows, and doors.

(2) At a minimum, shipped-loose wall paneling necessary for the joining of all sections of the home shall be installed by using polyvinyl acetate (PVA) or equal adhesive on all framing members and fastened with minimum one inch long staples or nails at six inches on center panel edges and twelve inches on center in the filed, unless alternative fastening methods are required in the manufactured home's installation instructions. (See figure 8C of this rule).

(F) Stairway walking surface.

The walking surface of the treads and landings of stairways shall be sloped no steeper than one unit vertical in forty eight inches horizontal (two per cent slope).

(G) Handrails.

Handrails shall be provided on at least one side of each continuous run of treads or flights with four or more risers.

(1) Handrail height, measured vertically from the sloped plane adjoining the tread nosing, or finish surface of ramp slope, shall not be less than thirty-four inches (864 mm) and not more than thirty-eight inches (965 mm).

(2) Handrails for stairways shall be continuous for the full length of the flight, from a point directly above the lowest riser of the flight. Handrail ends shall be returned or shall terminate in newel posts or safety terminals. Handrails adjacent to a wall shall have a space on not less than one and one half inch (38 mm) between the wall and the handrails.

(3) Exceptions:

(a) Handrails shall be permitted to be interrupted by a newel post at the turn.

(b) The use of a volute, turnout, start easing or starting newel shall be allowed over the lowest tread.

(c) Two or more separate rails shall be considered continuous if the termination of the rails occur over a single tread and within four inches ( 101.6 mm) of each other. If the transitioning between a wall-mounted rail shall return to the wall.

(H) Handrail grip size.

All required handrails shall be of one of the following types or shall be equivalent graspability.

(1) Type I. Handrails with a circular cross section shall have an outside diameter of at least one and one fourth inches (32 mm) and not greater than two inches (51 mm). If the handrails is not circular, it shall have a perimeter dimension of at least four inches (102 mm) and not greater than six and one-fourth inches (160 mm) with a maximum cross section of dimension of two and one-fourth (57 mm).

(2) Type II. Handrails with a perimeter greater than six and one-half inches (160 mm) shall provide a graspable finger recess area on both sides of the profile. The finger recess shall begin within a distance of three-quarters inch (19 mm) measured vertically from the tallest portion of the profile and achieve a depth of at least five-sixteenths inch (8 mm) within seven-eighths inch (10 mm) to a level that is not less than one and three-quarters inches (45 mm) below the tallest portion of the profile. The minimum width of the handrails above the recess shall be one and one-fourth inches (32 mm) to a maximum of 2 and three-quarters inches (70mm). Edges shall have a minimum radius of 0.01 inches ( 0.25 mm).

(I) Bulkhead enclosure stairways.

Stairways serving bulkhead enclosures, not part of the required building egress, providing access from the outside grade level to the basement shall be exempt from the requirements of this rule where the maximum height from the basement finished floor level to grade adjacent to the stairway does not exceed eight feet (2438 mm), and the grade level opening the stairway is covered by a bulkhead enclosure with hinged doors or other approved means. Where a stairway of two or fewer risers is located on the exterior side of a door, other than the required exit door, a landing is not required for the exterior side of the door.

(J) Ramps.

(1) Maximum slope. Ramps shall have a maximum slope of one unit vertical in eight units horizontal ( 12.5 -per cent slope).

(2) Landings required. A minimum three-foot-by-three-foot (914 mm by 914 mm) landing shall be provided:

(a) At the top and bottom of ramps;

(b) Where doors open onto ramps; and

(c) Where ramps change direction.

(3) Handrails required. Handrails shall be provided on at least one side of all ramps exceeding a slope of one unit vertical in twelve units horizontal ( 8.33 -per cent slope).

(4) Height. Handrail height, measured above the finished surface of the ramp slope, shall be not less than thirty-four inches (864 mm) and not more than thirty-eight inches (965 mm).

(5) Handrail grip size. Handrails on ramps shall comply with this rule.

(6) Continuity. Handrails where required on ramps shall be continuous for the full length of the ramp. Handrail ends shall be returned or shall terminate in newel posts or safety terminals. Handrails adjacent to a wall shall have a space of not less than one and one-half inches (38 mm) between the wall and the handrails.

(K) Landings at doors.

(1) There shall be a floor or landing on each side of each exterior door, except as follows:

(a) The floor or landing at the interior side of the exit door required by rule 4781-6-02.9 of the Administrative Code shall not be more than one and one-half inches (38 mm) lower than the top of the threshold. The floor or landing at exterior doors other than the exit door required by rule 4781-6-02.9 of the Administrative Code shall not be required to comply with this requirement but shall have a rise no greater than that permitted by this rule.

(b) Where a stairway of two or fewer risers is located on the exterior side of a door, other than the required exit door, a landing is not required for the exterior side of the door. The landing at the exterior side of the doorway shall not be more than eight and one-fourth inches (210 mm) below the top of the threshold.

(2) The width of each landing shall not be less than the door served. Every landing shall have a minimum dimension of twenty-four inches (610 mm) measured in the direction of travel, but no less than the dimension of door that swings over the landing.

(3) Type of lock or latch. All egress doors shall be readily openable from the side from which egress is to be made without the use of a key or special knowledge or effort.

(L) Stairways.

(1) Width. Stairways shall not be less than thirty-six inches (914 mm) in clear width at all points above the permitted handrails height and below the required headroom height. Handrails shall not project more than four and one-half inches (114 mm) on either side of the stairway and the minimum clear width of the stairway at and below the handrail height, including treads and landings, shall not be less than thirty-one and one-half inches (787 mm) where a handrail is installed on one side and twenty-seven inches (698 mm) where handrails are provided on both sides.

(2) All stairs shall be illuminated in accordance with the requirements in the 2008 national electric code (NEC).

(M) Headroom. The minimum headroom in all parts of the stairway shall not be less than six feet eight inches (2036 mm) measured vertically from the sloped plane adjoining the tread nosing or from the floor surface of the landing or platform.

(N) Stair treads and risers.

(1) Riser height. The maximum riser height shall be eight and one-fourths inches (210 mm). The riser shall be measured vertically between leading edges of the adjacent treads. The greatest riser height within any flight of stairs shall not exceed the smallest by more than three-eighths inches ( 9.5 mm).

(2) Tread depth. The minimum tread depth shall be nine inches (229 mm). The tread depth shall be measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread's leading edge. The greatest tread depth within any flight of stairs shall not exceed the smallest by more than three-eighths inch ( 9.5 mm). Winder treads shall have a minimum tread depth of nine inches (229 mm) measured as above at a point twelve inches (305 mm) from the side where the tread are narrower. Winder treads shall have a minimum tread depth of six inches (152 mm) at any point. Within any flight of stairs, the greatest winder tread depth at the twelve inch (305 mm) walk line shall not exceed the smallest by more than three-eighths inch ( 9.5 mm).

(3) Profile. The radius of curvature at the leading edge of the tread shall be no greater than nine-sixteenths inch ( 14.3 mm). A nosing not less than three-fourths inch (19 mm) but not more than one and one-fourths inch (32 mm) shall be provided on stairways with solid risers. The greatest nosing projection shall not exceed the smallest nosing projection. by more than three-eighths inch ( 9.5 mm) between two stories, including the nosing at the level of floors and landings. Beveling of nosing shall not exceed one-half inch ( 12.7 mm). Risers shall be vertical or sloped from the underside of the leading edge of the tread above at an angle not more than thirty ( 0.51 rad) degrees from the vertical. Open risers are permitted, provided that the opening between treads does not permit the passage of a four-inch diameter (102 mm) sphere. Exceptions:

(a) A nosing is not required where the tread depth is a minimum of eleven inches (279 mm).

(b) The opening between adjacent treads is not limited on stairs with a total rise of thirty inches (762 mm) or less.

(O) Landings for stairways.

(1) There shall be a floor or landing at the top and bottom of each stairway unless a floor or landing is not required at the top of an interior flight of stairs, provided a door does not swing over the stairs.

(2) A flight of stairs shall not have a vertical rise greater than twelve feet (3658 mm) between floor levels or landings.

(3) The width of each landing shall not be less than the stairway served. Every landing shall have a minimum dimension of thirty-six inches (914 mm) measured in the direction of travel.

(P) Guards (railings) required. Porches, balconies or raised floor surfaces located more than thirty inches (762 mm) above the floor or grade below shall have guards thirty-six inches (914 mm) in height. Open sides of stairs with a total rise of more than thirty inches (762 mm) above the floor or grade below shall have guards not less than thirty-four inches (864 mm) in height measured vertically from the nosing of the treads.

(1) Guard opening limitations. Required guards on open sides of stairways, raised floor areas, balconies and porches shall have intermediate rails or ornamental closures which do not allow the passage of a sphere four inches (102 mm) or more in diameter.

(2) Side approach. Platform must be thirty-six inches in projection. Railing must be on one side and at the end of door swing.

(3) Exception. The triangular openings formed by the riser, tread and bottom rail of a guard at the open side of the stairway are permitted to be of such size that a sphere six inches (152 mm) cannot pass through.

Replaces: 4781-6- 02.8

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 9/15/2006, 1/1/2010, 6/2/2011

4781-6-03.9 Information for installers.

(A) General.

The planning and permitting processes as well as utility connections shall be governed by the authority having jurisdiction.

(1) Permits and plans review shall be required for all manufactured home installations, in manufactured home parks and on private property. In regions where there is no certified inspection department, the commission may assign third party plans review and inspection agencies to perform inspections or plans review.

(2) Inspections shall be required for all manufactured home installations. Two or more inspections may be required to verify compliance with these standards. It is the responsibility of the installer to call for inspection of the work which they perform. The installer or his or her designee may call for inspection, however, the installer is solely responsible to ensure that the calls for inspection are made in an appropriate and timely manner.

(a) The authority having jurisdiction may provide permit, plan review and inspection for footing or base support system not including installation of manufactured home, provided the installer make application as prescribed by the commission, and approved for location and installed in accordance with paragraphs L to P of rule 4781-6-02.3 of the Administrative Code.

(b) Permit and plan review in paragraph (A) of this rule shall be the same as required in rules 4781-7-09 and 4781-12-05 of the Administrative Code.

(3) Where it is impractical for the manufactured home to conform to the strict letter of these standards, the inspector may accept methods or materials that are substantially equivalent to these standards. Engineering may be required to substantiate equivalency if structural components of the manufactured home have been altered or replaced, at no cost to the authority having jurisdiction.

(4) Once the inspections are made and final approval is given, the inspector shall attach a commission approved seal to the manufactured home.

(B) Moving manufactured home to location.

(1) The manufactured homes shall be moved to the site and placed on the site only when the site is prepared in accordance with these standards and when the utilities are available as required by the authority having jurisdiction.

(2) Access for the transporter. Before attempting to move a home, the transporter should ensure that the transportation equipment and home can be routed to the installation site and that all special transportation permits required by the authority having jurisdiction have been obtained.

(3) Drainage structures. Ditches and culverts used to drain surface runoff shall meet the requirements of the authority having jurisdiction and are considered in the overall site preparation.

(C) Permits and alterations.

(1) Issuance of permits. All necessary fee(s) shall be paid and permits shall be obtained, which may include verification that the requirements of the authority having jurisdiction regarding encroachments in streets, yards, and courts are obeyed and that permissible setback and fire separation distances from property lines and public roads are met.

(2) Alterations. Prior to making any alteration to a home or its installation, the installer shall contact the authority having jurisdiction to determine if plan approval and permits are required.

(D) Installation of manufactured home with attached accessory building or structure.

(1) Each accessory building or structure is designed to support all of its own live and dead loads, unless the structure is included in the manufactured home's installation instructions or designed by an Ohio registered professional engineer or registered architect. The design loads for an accessory building and structure shall be the site specific loads according to the residential code of Ohio. No accessory building or structure shall restrict the egress openings including required egress doors and windows. The inspection of construction of accessory buildings or structures shall be performed by the local authority having jurisdiction, not Ohio manufactured homes commission inspectors.

(2) Awnings and carpots.

(a) Awnings and carports shall not restrict the required egress openings in a manufactured home.

(b) Awnings and carports shall be open on at least one side. If enclosed on three sides, must maintain a thirty-six inch means of egress toward the opposite of the open end.

(3) Attached garages.

(a) An attached garage shall be free standing and self-supporting and anchored and supported in accordance with the manufacturer's installation instructions. If the attached garage is site-built, it shall be constructed in accordance with the residential code of Ohio. Attached garages shall have the fire separation from living and sleeping spaces as required in the residential code of Ohio. The inspection of construction of accessory buildings shall be performed by the local authority having jurisdiction, not Ohio manufactured homes commission inspectors.

(b) Garages shall not eliminate the path of egress from the manufactured home. Garages shall not be placed where the bedroom egress window is blocked unless there is a second egress window in the same bedroom which is not blocked. Alternate egress routes shall be subject to approval by the authority having jurisdiction.

(c) One manufactured home egress door shall open directly to the outside without passing through a garage or accessory building.

(d) Ventilation, attic access, and crawl space access openings between the manufactured home and garage shall not be permitted.

(4) Basements

(a) Basements not designed by the home manufacturer shall be designed by an Ohio registered professional engineer or registered architect in accordance with MHCSS, the requirements of the manufactured home and these standards.

(b) Basements shall be designed for the appropriate horizontal and vertical loads required for the site per the residential code of Ohio. Basement design loads shall include the live and dead loads of the manufactured home.

(c) Except where specified in these standards, or the manufacturer's installation instructions, basements shall be constructed in accordance with the residential code of Ohio. The inspection of construction of basements shall be performed by the local authority having jurisdiction, not Ohio manufactured homes commission inspectors.

(d) Basements shall have smoke alarms or detectors installed in accordance with the manufactured home installation instructions, residential code of Ohio, manufacturer's listing and installation instructions or NFPA 72 and these standards.

(e) Basements may include a garage if wall, ceiling and door separation is provided in accordance with the provisions for garages in the residential code of Ohio.

(5) Miscellaneous modifications.

All egress doors and windows shall be readily openable without the use of a key or special effort or knowledge. No installer shall alter the manufacturer's egress provisions except where specifically permitted in these standards. Bars, grills, screens or other obstructions placed over egress doors or windows shall be releasable or removable from the inside without the use of a key or tool.

(E) Utility system connections.

(1) Proper procedures. The authority having jurisdiction shall be consulted before connecting the manufactured home to any utilities, and only qualified personnel familiar with local requirements are permitted to make utility site connections and conduct tests.

(2) Drainage system. The main drain line shall be connected to the site's sewer hookup, using an elastomeric coupler or by other methods acceptable to the authority having jurisdiction, as shown in figure 9A of this rule.


              image: oh/admin/2014/4781-6-03$9_ph_ff_n_ru_20121120_1008-1.jpg

(3) Fuel supply system.

(a) Conversion of gas appliances. A service person acceptable to the authority having jurisdiction may convert the appliance from one type of gas to another, following instructions by the manufacturer of each appliance.

(b) Orifices and regulators. Before making any connections to the site supply, the inlet orifices of all gas-burning appliances shall be checked to ensure they are correctly set up for the type of gas to be supplied.

(c) Connection procedures. Gas-burning appliance vents shall be inspected to ensure that they are connected to the appliance and that roof jacks are properly installed and have not come loose during transit.

(d) Gas appliance start up procedures. The authority having jurisdiction shall be consulted concerning the following gas appliance startup procedures:

(i) One at a time, opening equipment shutoff valves, lighting pilot lights when provided, and adjusting burners and spark igniters for automatic ignition systems shall be in accordance with each appliance manufacturer instructions.

(ii) Checking the operation of the furnace and water heater thermostats.

(iii) The authority having jurisdiction shall be consulted prior to connection to the gas supply.

(F) Heating oil systems.

(1) Homes equipped with oil burning furnaces shall have their oil supply tank and piping installed and tested on site in accordance with in accordance with NFPA 31, "Standard for the Installation of Oil Burning Equipment," 2001 or the authority having jurisdiction, whichever is more stringent.

(2) The oil burning furnace manufacturer's instructions shall be consulted for pipe size and installation procedures.

(3) Oil storage tanks and pipe installations shall meet all applicable local regulations of the authority having jurisdiction.

(4) Tank installation requirements.

(a) The tank shall be located where it is accessible to service and supply and safe from fire and other hazards.

(b) In flood hazard areas, the oil storage tank shall be anchored and elevated to or above the design flood elevation, or anchored and designed to prevent flotation, collapse, or permanent lateral movement during the design flood.

(c) Leak test procedure. Before the system is operated, it shall be checked for leaks in the tank and supply piping in accordance with NFPA 31, "Standard for the Installation of Oil Burning Equipment," 2001or the requirements of the authority having jurisdiction, whichever is more stringent.

(G) Telephone and cable television.

Telephone and cable television wiring shall be installed in accordance with requirements of the authority having jurisdiction and the national electric code, NFPA No. 70-2008.

Replaces: 4781-6- 02.9

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04 , 4781.11
Prior Effective Dates: 9/15/2006, 10/16/2009, 1/1/2010, 6/2/2011

4781-6-03.10 Stable foundations - commission approved alternative park installations.

(A) Stable foundations for used manufactured homes - general

(1) Commission approved designs and details shall be acceptable alternatives for installations of used manufactured homes only for licensed manufactured housing parks or as otherwise specified in Chapter 4781-6 of the Administrative Code. Where an item is not mentioned specifically in one of these alternative designs, that installation item or element shall meet the state of Ohio manufactured home installation standards under Chapter 4781-6 of the Administrative Code. A foundation design method must be employed in its entirety. If an item or element is specified in the selected alternative design, that item or element or an equal or more stringent item or element shall be part of the installation. At the time of permit approval and prior to the installation, the alternative design must be selected and the authority having jurisdiction informed as to which installation foundation alternative design or method the installer seeks approval to use.

(2) These alternatives are not appropriate for use in areas located within a one hundred year flood plain.

(B) Alternate method 1 - existing manufactured home parks

(C) Alternate method 2 - manufactured home commission park installation alternative foundation designs

The commission may approve and distribute alternative park installation foundation designs including designs using runners, ribbons, or slabs which do not meet the requirements for a permanent foundation when all of the following are met:

(1) The complete installation foundation design has been reviewed and recommended for approval by the commission's designated engineer, the commission subcommittee on foundations, and the commission;

(2) The installation foundation design shall not take the manufactured home out of compliance with the federal manufactured home construction and safety standards (MHCSS);

(3) The installation foundation design shall provide protection to residents of manufactured housing that equals or exceeds the protection provided by the installation standards for used manufactured homes set forth in Chapter 4781-6 of the Administrative Code except frost depth requirements for ribbons, runners and slabs;

(4) The installation foundation design shall have broad applicability for use in a variety of locations throughout Ohio and provide for the MHCSS Ohio design loads and various Ohio soils conditions, and other design conditions throughout Ohio. The installation foundation design shall clearly specify any conditions, limitations, or requirements including site conditions specific to the designs; and

(5) The installation foundation design shall include, the dimensions of footings, runners, ribbons or slab; anchorage details including spacing and general specifications for anchors, and pier and blocking spacing requirements;

(6) The installation foundation design shall be prepared by an Ohio registered architect or professional engineer who has agreed to release their copyright control over the installation foundation design for distribution by the commission as a public record; and

(7) The commission, or its designated engineer or its subcommittee may request additional drawings, details and/or structural calculations to be prepared and sealed by a licensed architect or professional engineer who has agreed to release their copyright control over the installation foundation design for distribution by the commission as a public record as supporting documents for the installation foundation design prior to approval by the commission.

Replaces: 4781-6- 02.10

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 7/1/2007, 1/1/2010

4781-6-03.11 Commission approved alternative installation designs for used manufactured homes.

(A) General

(1) Commission approved installation designs and details shall be acceptable alternatives for installations of used manufactured homes on private property or in manufactured home parks. Where an item is not mentioned specifically in a commission approved alternative design, that installation item or element shall meet the state of Ohio used manufactured home installation standards under Chapter 4781-6 of the Administrative Code. A foundation design method must be employed in its entirety. If an item or element is specified in the selected alternative design, that item or element or an equal or more stringent item or element shall be part of the installation. At the time of permit approval and prior to the installation, the alternative design must be selected and the authority having jurisdiction informed as to which installation foundation alternative design or method the installer seeks approval to use.

(2) In addition to the used manufactured home installation requirements of Chapter 4781. of the Revised Code, installations in a manufactured home park may have additional requirements pursuant to Chapter 4781-12-08 of the Administrative Code.

(3) Unless specifically indicated as appropriate for use within a one hundred year flood plain, these alternatives shall not be used in areas located within a one hundred year flood plain.

(B) Altenate method - manufactured home commission alternative foundation designs

The commission may approve and distribute alternative installation foundation designs when all of the following are met:

(1) The complete installation foundation design has been reviewed and recommended for approval by the commission's designated engineer, the commission subcommittee on foundations, and the commission;

(2) The installation foundation design shall not take the manufactured home out of compliance with the federal manufactured home construction and safety standards (MHCSS);

(3) The installation foundation design shall provide protection to residents of manufactured housing that equals or exceeds the protection provided by the used manufactured homes installation standards set forth in Chapter 4781-6 of the Administrative Code;

(4) The installation foundation design shall have broad applicability for use in a variety of locations throughout Ohio and provide for the MHCSS Ohio design loads and various Ohio soils conditions, and other design conditions throughout Ohio. The installation foundation design shall clearly specify any conditions, limitations, or requirements including site conditions specific to the designs; and

(5) The installation foundation design shall include the dimensions of footings; anchorage details including spacing and general specifications for anchors, and pier and blocking spacing requirements;

(6) The installation foundation design shall be prepared by an Ohio licensed professional architect or engineer who has agreed to release their copyright control over the installation foundation design for distribution by the commission as a public record; and

(7) The commission, or its designated engineer or its subcommittee may request additional drawings, details and/or structural calculations to be prepared and sealed by a licensed profession architect or engineer who has agreed to release their copyright control over the installation foundation design for distribution by the commission as a public record as supporting documents for the installation foundation design prior to approval by the commission.

Replaces: 4781-6- 2.11

Effective: 12/01/2012
R.C. 119.032 review dates: 12/01/2017
Promulgated Under: 119.03
Statutory Authority: 4781.04
Rule Amplifies: 4781.04
Prior Effective Dates: 7/1/2007, 1/1/2010, 6/2/2011