§3280.4. Incorporation by reference. — Inbound Citations

(1) Attached manufactured homes shall be separated from each other by a fire separation wall of not less than1-hour fire-resistive rating with exposure from both sides on each attached manufactured home unit when rated based on tests in accordance with ASTM E119 (incorporated by reference, see § 3280.4).

(d) As an option to complying with the provisions of paragraphs (b) and (c) of this section, ventilation systems complying with ANSI/ASHRAE 62.2 (incorporated by reference, see § 3280.4) may be used.

(c) Except as provided in paragraph (d) of this section, the following locations and areas require the use of safety glazing conforming to the requirements of paragraph (c) of this section:

(1) Glazing in all entrance or exit doors;

(2) Glazing in fixed and sliding panels of sliding glass doors;

(3) Glazing in storm-type doors;

(4) Glazing in unframed side-hinged swinging doors;

(5) Glazing in doors and fixed panels less than 60 inches above the room floor level that enclose bathtubs, showers, hydromassage tubs, hot tubs, whirlpools, saunas;

(6) Glazing within 12 inches horizontally, as measured from the edge of the door in the closed position, and 60 inches vertically as measured from the room floor level, adjacent to and in the same plane of a door;

(7) Glazing within 36 inches of an interior room walking surface when the glazing meets all of the following:

(i) Individual glazed panels exceed 9 square feet in area in an exposed surface area;

(ii) The bottom edge of the exposed glazing is less than 19 inches above the room floor level; and

(8) Glazing in rails and guardrails; and

(9) Glazing in unbacked mirrored wardrobe doors (i.e., mirrors that are not secured to a backing that is capable of being the door itself).

(b) Walls, partitions, and floor/ceiling assemblies between stories separating dwelling units from each other must have a sound transmission class (STC) of not less than 34 for air-borne noise when tested in accordance with ASTM E90 (incorporated by reference, see § 3280.4) or calculated. Penetrations or openings in construction assemblies for piping; electrical devices; recessed cabinets; bathtubs; soffits; or heating, ventilating, or exhaust ducts must be sealed, lined, insulated or otherwise treated to maintain the required ratings. This requirement does not apply to dwelling unit entrance doors; however, such doors must be tight fitting to the frame and sill.

(3) The microwave oven is certified to be in conformance with Microwave Cooking Appliances, UL 923-2002 (incorporated by reference, see § 3280.4).

(a) Except for foam plastic materials and as provided in this section, exposed and concealed thermal insulating materials, including any facings, must be tested in accordance with NFPA 255-96, Standard Method of Test of Surface Burning Characteristics of Building Materials (incorporated by reference, see § 3280.4) and must have a flame spread index of 25 or less and a smoke developed index of 450 or less. The flame spread and smoke developed limitations do not apply to:

(1) Coverings and facings of insulation batts or blankets installed in concealed spaces when the facings are in substantial contact with the unexposed surface of wall, floor, or ceiling finish; or

(a) Each smoke alarm required under paragraph (b) of this section must conform with the requirements of UL 217 (incorporated by reference, see § 3280.4) or UL 268 (incorporated by reference, see § 3280.4), and must bear a label to evidence conformance. Combination smoke and carbon monoxide alarms shall be listed and must bear a label to evidence conformance with UL 217 and UL 2034.

(a) Carbon monoxide alarms shall be listed and must bear a label to evidence conformance with UL 2034 (incorporated by reference, see § 3280.4). Combination carbon monoxide and smoke alarms shall be listed and must bear a label to evidence conformance with UL 2034 and UL 217 (incorporated by reference, see § 3280.4).

(b) The design of the fire sprinkler system itself shall be in accordance with NFPA 13D (incorporated by reference, see § 3280.4) or a design which is deemed to be equivalent to the design method used in NFPA 13D.

(a) In manufactured homes with more than one dwelling unit, each dwelling unit must be separated from each other by wall and floor assemblies having not less than a 1 hour fire resistance rating when tested in accordance with ASTM E119 or UL 263 (both incorporated by reference, see § 3280.4) or having a fire resistance rating of not less than a 1 hour when calculated in accordance with chapter 16 of the AWC National Design Specification (NDS) for Wood Construction, with Supplement (incorporated by reference, see § 3280.4).

(b) The standards for some of the generally used materials and methods of construction that are listed in this paragraph (b) are incorporated by reference (see § 3280.4).

(i) Aluminum Design Manual, Specifications and Guidelines for Aluminum Structures, Part 1-A (Aluminum Association).

(ii) Aluminum Design Manual, Specifications and Guidelines for Aluminum Structures, Part 1-B (Aluminum Association).

(i) AISC 360.

(ii) AISI S100.

(iii) SEI/ASCE 8.

(iv) SJI.

(v) ASCE 19.

(vi) ASTM D3953.

(i) ANSI A135.4 (Composite Panel Association).

(ii) ANSI A135.5 (Composite Panel Association).

(iii) ANSI A135.6 (Composite Panel Association).

(iv) ANSI/HPVA HP-1 (Decorative Hardwoods Association).

(v) HP-SG (Decorative Hardwoods Association).

(vi) Structural Glued Laminated Timber—ANSI/AITC A190.1.

(vii) NIST PS 1.

(viii) APA E30-P.

(x) H815G.

(xi) APA D510C.

(xii) APA S812S.

(xiii) APA S811P.

(xv) NIST PS 2.

(xvi) APA U813M.

(xvii) National Design Specifications for Wood Construction, with Supplement, Design Values for Wood Construction—AWC NDS.

(xix) American Softwood Lumber Standard (PS 20-10) Sizes—AWC-2012.

(xx) AWC-2012.

(6) Bottom board material (with or without patches) must meet or exceed the level of 48 inch-pounds of puncture resistance as tested by the Beach Puncture Test in accordance with Standard Test Methods for Puncture and Stiffness of Paperboard, and Corrugated and Solid Fiberboard, ASTM D781-1968 (Reapproved 1973) (incorporated by reference, see § 3280.4). The material must be suitable for patches and the patch life must be equivalent to the material life. Patch installation instruction must be included in the manufactured home manufacturer's instructions. The bottom board material must be tight fitted against all penetrations.

(v) That anchoring equipment should be certified by a registered professional engineer or architect to resist these specified forces in accordance with testing procedures in ASTM D3953-97, Standard Specification for Strapping, Flat Steel and Seals (incorporated by reference, see § 3280.4).

(1) All vinyl siding must comply with the requirements of ASTM D3679 (incorporated by reference, see § 3280.4) and must be certified or listed and labeled as conforming to those requirements.

(1) All primary windows and sliding glass doors must comply with AAMA 1701.2 or AAMA/WDMA/CSA 101/I.S.2/A440 (both incorporated by reference, see § 3280.4), except the exterior and interior pressure tests must be conducted at the minimum design wind loads required for components in § 3280.305(c)(1).

(b) Egress windows including auxiliary frame and seals, if any, must meet all requirements of AAMA 1701.2 and AAMA 1704 or AAMA/WDMA/CSA 101/I.S.2/A440 (all incorporated by reference, see § 3280.4).

(1) Exterior and interior pressure tests for components and cladding must be conducted meeting or exceeding the minimum design wind loads required by § 3280.305(c)(1).

(2) All egress systems must have a minimum clear horizontal dimension of 20 inches and a minimum clear vertical dimension of 24 inches and have a clear opening of at least 5 ft 2.

(b) The design and construction of exterior door units must meet all requirements of AAMA 1702.2 or AAMA/WDMA/CSA 101/I.S.2/A440 (both incorporated by reference, see § 3280.4).

(b) Testing of composite wood products must be performed pursuant to the general requirements of 40 CFR 770.20(a) and (b). Certification testing must be performed pursuant to one of the air chamber test methods specified in 40 CFR 770.15 (ASTM E1333-14, or ASTM D6007-14, both incorporated by reference, see § 3280.4). Quarterly testing must be performed pursuant to one of the air chamber test methods specified in 40 CFR 770.20(c) (ASTM E1333-14 or ASTM D6007-14).

(1) In Uo Value Zones 2 and 3, ceilings must have a vapor retarder with a permeance of not greater than 1 perm as measured by ASTM E96/E96M (incorporated by reference, see § 3280.4), installed on the living space side of the roof cavity.

(b) For each home designated as suitable for central air conditioning the manufacturer shall provide the maximum central manufactured home air conditioning capacity certified in accordance with the ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4) and in accordance with § 3280.715(a)(3). If the capacity information provided is based on entrances to the air supply duct at other than the furnace plenum, the manufacturer shall indicate the correct supply air entrance and return air exit locations.

(a) Materials, devices, fixtures, fittings, equipment, appliances, appurtenances and accessories shall conform to one of the standards listed in this section (all incorporated by reference, see § 3280.4) and be free from defects. Where an appropriate standard is not listed in this section or a standard not listed is preferred, the item may be used if it is listed. A listing is also required when so specified in other sections of this subpart.

(iii) Shower doors and tub and shower enclosures must be constructed so as to be waterproof and, if glazed, glazing must comply with ANSI Z97.1 (incorporated by reference, see § 3280.4)

(D) Sealing disc must be either:

(1) Neoprene, conforming to CISPI-HSN-85, Specification for Neoprene Rubber Gaskets for HUB and Spigot Cast Iron Soil Pipe and Fittings (incorporated by reference, see § 3280.4), and to ASTM C564-97, Standard Specification for Rubber Gaskets for Cast Iron Soil Pipe and Fittings (incorporated by reference, see § 3280.4); or

(2) Other material, conforming to ASTM C920-02, Standard Specification for Elastomeric Joint Sealants (incorporated by reference, see § 3280.4), and to ASTM D4635-01, Standard Specification for Polyethylene Films Made from Low-Density Polyethylene for General Use and Packaging Applications (incorporated by reference, see § 3280.4).

The definitions in this subpart apply to subpart H only.

Heating, cooling, and fuel burning appliances and systems in manufactured homes shall be free of defects and shall conform to applicable standards (incorporated by reference, see § 3280.4) in this section unless otherwise specified in this part. When more than one standard is referenced, compliance with any one such standard shall meet the requirements of this part.

(1) Steel or wrought-iron pipe shall comply with ASME B36.10 (incorporated by reference, see § 3280.4). Threaded brass pipe in iron pipe sizes may be used. Threaded brass pipe shall comply with ASTM B43. (incorporated by reference, see § 3280.4).

(1) Steel or wrought-iron pipe shall comply with ANSI/ASME B36.10 (incorporated by reference, see § 3280.4). Threaded copper or brass paper in iron pipe sizes may be used.

(2) All gas and oil-fired automatic storage water heaters shall have a recovery efficiency, E, and a standby loss, S, as described below. The method of test of E and S shall be as described in section 2.7 of Gas Water heaters, Vol. I, Storage Water Heaters with Input/Ratings of 75,000 BTU per hour or less, ANSI Z21.10.1 (CSA Group; incorporated by reference, see § 3280.4), except that for oil-fired units. CF = 1.0, Q = total gallons of oil consumed and H = total heating value of oil in BTU/gallon.

(1) Mechanical air conditioners shall be rated in accordance with the ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4) and certified by AHRI or other nationally recognized testing agency capable of providing follow-up service.

(i) Electric motor-driven unitary air-cooled air conditioners and heat pumps in the cooling mode with rated capacity less than 65,000 BTU/hour (19,045 watts), when rated at AHRI standard rating conditions in ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4), must have seasonal energy efficiency (SEER) values not less than as specified in 10 CFR part 430, Energy Conservation Program for Consumer Products: Central Air Conditioners and Heat Pumps Energy Conservation Standards.

(ii) Heat pumps must be certified to comply with all requirements of the ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4). Electric motor-driven vapor compression heat pumps with supplemental electrical resistance heat must be sized to provide by compression at least 60 percent of the calculated annual heating requirements for the manufactured home being served. A control must be provided and set to prevent operation of supplemental electrical resistance heat at outdoor temperatures above 40 °F (4 °C), except for defrost conditions. Electric motor-driven vapor compression heat pumps with supplemental electric resistance heat conforming to ANSI/AHRI Standard 210/240 with Addenda 1 and 2, must have Heating Season Performance Factor (HSPF) efficiencies not less than as specified in the 10 CFR part 430, Energy Conservation Program for Consumer Products: Central Air Conditioners and Heat Pumps Energy Conservation Standards.

(iii) Electric motor-driven vapor compression heat pumps with supplemental electric resistance heat conforming to ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4), shall show coefficient of performance ratios not less than shown below:

(1) Supply air ducts, fittings, and any dampers contained there-in must be made of galvanized steel, tin-plated steel, or aluminum, or must be listed as Class 0 or Class 1 air ducts in accordance with UL 181 (incorporated by reference, see § 3280.4). Air ducts and air connectors located within three feet of the furnace discharge must be rated to withstand the maximum air discharge temperature of the equipment. Air connectors must not be used for exterior manufactured home duct connections. A duct system integral with the structure must be of durable construction that can be demonstrated to be equally resistant to fire and deterioration as required by this section. Ducts constructed of sheet metal must be in accordance with the following table:

(a) This subpart I incorporates by reference NFPA 70 (incorporated by reference, see § 3280.4) including Part II of Article 550 of NFPA 70, and covers the electrical conductors and equipment installed within or on manufactured homes and the conductors that connect manufactured homes to a supply of electricity. However, Articles 550.4(A) and 550.4(B) of NFPA 70 shall not apply.

(1) One mast weatherhead installation installed in accordance with Article 230 of NFPA 70 (incorporated by reference, see § 3280.4), containing four continuous insulated, color-coded, feeder conductors, one of which shall be an equipment grounding conductor; or

(a) The branch-circuit equipment is permitted to be combined with the disconnecting means as a single assembly. Such a combination is permitted to be designated as a distribution panelboard. If a fused distribution panelboard is used, the maximum fuse size for the mains shall be plainly marked, with the lettering at least 1/4 inch high and visible when fuses are changed. See Article 110.22 of NFPA 70 (incorporated by reference, see § 3280.4), concerning the identification of each disconnecting means and each service, feeder, or branch circuit at the point where it originated, and the type of marking needed.

(iv) The rating of the range branch circuit is based on the range demand as specified for ranges in § 3280.811(a)(5). For central air conditioning, see Article 440 of NFPA 70 (incorporated by reference, see § 3280.4).

(2) Installed according to Article 406.3 of NFPA 70 (incorporated by reference, see § 3280.4).

(c) Where a lighting fixture is installed over a bathtub or in a shower stall, it must be listed for wet locations. See also Article 410.410(D) of NFPA 70 (incorporated by reference, see § 3280.4).

(a) Except as specifically permitted by this part, the wiring methods and materials specified in NFPA 70 (incorporated by reference, see § 3280.4) must be used in manufactured homes.

(3) Electrical polarity checks to determine that connections have been made in accordance with applicable provisions of these standards and Article 550.17 of NFPA 70 (incorporated by reference, see § 3280.4). Visual verification is an acceptable electrical polarity check.

(b) The following is an optional method of calculation for lighting and appliance loads for manufactured homes served by single 3-wire 120/240 volt set of feeder conductors with an ampacity of 100 or greater. The total load for determining the feeder ampacity may be computed in accordance with the following table instead of the method previously specified. Feeder conductors whose demand load is determined by this optional calculation are permitted to have the neutral load determined by Article 220.61 of NFPA 70 (incorporated by reference, see § 3280.4). The loads identified in the table as “other load” and as “Remainder of other load” must include the following:

(1) 1500 volt-amperes for each 2-wire, 20-ampere small appliance branch circuit and each laundry branch circuit specified.

(2) 3 volt-amperes per square foot for general lighting and general-use receptacles.

(3) The nameplate rating of all fixed appliances, ranges, wall-mounted ovens, counter-mounted cooking units, and including 4 or more separately controlled space heating loads.

(i) Air conditioning load;

(ii) The 65 percent diversified demand of the central electric space heating load;

(iii) The 65 percent diversified demand of the load of less than four separately-controlled electric space heating units.