(iii) Eaves and cornices shall be designed for a net uplift pressure of 2.5 times the design uplift wind pressure cited in § 3280.305(c) (1) and (2). (4) The Data Plate posted in the mobile home (See § 3280.5) shall show for which structural zone(s) of the USA the mobile home has been designed and the actual design external snow and/or wind live loads. The Data plate shall include reproduction of the Load Zone Maps shown in this Section and related information. The Load Zone Maps shall be not less than onehalf the size illustrated. as (f) Walls. The walls shall be of sufficient strength to withstand the load requirements defined in § 3280.305(c) of this part, without exceeding the deflections as specified in § 3280.305(d). The connections between the bearing walls, floor, and roof framework members shall be fabricated in such a manner as to provide support for the material used to enclose the mobile home and to provide for transfer of all lateral and vertical loads to the floor and chassis. (1) Except where substantiated by engineering analysis or tests, studs Ishall not be notched or drilled in the middle one-third of their length. (2) Interior walls and partitions shall be constructed with structural capacity adequate for the intended purpose and shall be capable of resisting a horizontal load of not less than five pounds per square foot. Finish of walls and partitions shall be securely fastened to wall framing. (g) Floors. (1) Floor assemblies shall be designed in accordance with accepted engineering practice standards to support a minimum uniform live load of 40 lb/ft2 plus the dead load of the materials. In addition (but not simultaneously), floors shall be able to support a 200-pound concentrated load on a one-inch diameter disc at the most critical location with a maximum deflection not to exceed one-eighth inch relative to floor framing. Perimeter wood joists of more than six inches depth shall be stabilized against overturning from superimposed loads as follows: at ends by solid blocking not less than two-inch thickness by full depth of joist, or by connecting to a continuous header not less than twoinch thickness and not less than the depth of the joist with connecting devices; at eight-feet maximum intermediate spacing by solid blocking or by wood cross-bridging of not less than one inch by three inches, metal crossbridging of equal strength, or by other approved methods. (2) Wood, wood fibre or plywood floors or subfloors in kitchens, bathrooms (including toilet compartments), laundry rooms, water heater compartments, and any other areas subject to excessive moisture shall be moisture resistant or shall be made moisture resistant by sealing or by an overlay of nonabsorbent material applied with water-resistant adhesive. Carpets and/or carpet pads shall not be installed in concealed spaces subject to excessive moisture such as plumbing fixture spaces. (3) Except where substantiated by engineering analysis or tests: (i) Notches on the ends of joists shall not exceed one-fourth the joist depth. (ii) Holes bored in joists shall not be within 2 inches of the top or bottom of the joist, and the diameter of any such hole shall not exceed one-third the depth of the joist. (iii) Notches in the top or bottom of the joists shall not exceed one-sixth the depth and shall not be located in the middle third of the span. (4) Bottom board material (with or without patches) shall meet or exceed the level of 48 inch-pounds of puncture resistance as tested by the Beach Puncture Test in accordance with ASTM D-781-68. The material shall be suitable for patches and the patch life shall be equivalent to the material life. Patch installation instruction shall be included in the mobile home manufacturer's instructions. (h) Roofs. (1) Roofs shall be of sufficient strength to withstand the load requirements as defined in § 3280.305 (b) and (c) without exceeding the deflections specified in § 3280.305(d). The FHDA-Fir and Hemlock Door Association, GAL-Gas Appliance Laboratory, 3138 East Olympic Boulevard, Los Angeles, California 90023. HUD-U.S. Department of Housing and Urban Development, Washington, D.C. 20410. HPMA-Hardwood Plywood Manufacturers IAPMO-International Plumbing and Mechanical Officials, 5032 Alhambra Avenue, Los Angeles, California 90032. I-SANTA-Industrial Staple and Nail Tech- Fire Protection Association, 470 Atlantic Avenue, Boston, Massachusetts. (N)FPA-National Forest Products Association (formerly National Lumber Manufacturers Association), 1619 Massachusetts Ave., Wash., D.C. 20036. NPA-National Particleboard Association, 2306 Perkins Place, Silver Spring, Maryland 20910. NSF National Sanitation Foundation, 3475 Plymouth Road, Ann Arbor, Michigan 48105. NWMA-National Woodwork Manufacturers Association, 400 West Madison Street, Chicago, Illinois 60606. PS-Product Standard-Superintendent of UL-Underwriters' Laboratories, Inc., 207 [40 FR 58752, Dec. 18, 1975, as amended at 42 FR 960, Jan. 4, 1977] location. Data plates shall contain not less than the following information: (1) The name and address of the manufacturing plant in which the mobile home was manufactured. (2) The serial number and model designation of the unit and the date the unit was manufactured. (3) The statement, "This mobile home is designed to comply with the Federal mobile home construction and safety standards in force at the time of manufacture." (4) A list of major factory-installed equipment including the manufacturer's name and the model designation of each appliance. (5) Reference to the structural zone and wind zone for which the home is designed and duplicates of the maps as set forth in § 3280.305(c)(4). This information may be combined with the heating/cooling certificate and insulation zone maps required by §§ 3280.510 and 3280.511. (6) The statement: “Design Approval by" followed by the name of the agency which approved the design. [42 FR 960, Jan. 4, 1977] § 3280.6 Serial number. (a) A mobile home serial number which will identify the manufacturer and the state in which the mobile home is manufactured, must be stamped into the foremost cross member. Letters and numbers must be % inch minimum in height. Numbers must not be stamped into hitch assembly or drawbar. § 3280.7 Modular Homes. A structure which meets the definition of "mobile home" set out in § 3280.2(a)(16) is not subject to the provisions of this part if it enters the first stage of production before June 30, 1978, and meets any one or more of the following criteria: (a) The structure is manufactured in accordance with and meets the following codes or the most recent edition of the following codes published by Building Officials and Code Administrators (BOCA) and the National Fire Protection Association (NFPA): (1) BOCA Basic Building Code 1975; |