[Code of Federal Regulations]

[Title 24, Volume 5]

[Revised as of April 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 24CFR3280.303]



[Page 123-124]

 

                 TITLE 24--HOUSING AND URBAN DEVELOPMENT

 

 CHAPTER XX--OFFICE OF ASSISTANT SECRETARY FOR HOUSING--FEDERAL HOUSING 

        COMMISSIONER, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT

 

PART 3280_MANUFACTURED HOME CONSTRUCTION AND SAFETY STANDARDS--Table 

of Contents

 

           Subpart D_Body and Frame Construction Requirements

 

Sec.  3280.303  General requirements.



    (a) Minimum requirements. The design and construction of a 

manufactured home shall conform with the provisions of this standard. 

Requirements for any size, weight, or quality of material modified by 

the terms of minimum, not less than, at least, and similar expressions 

are minimum standards. The manufacturer or installer may exceed these 

standards provided such deviation does not result in any inferior 

installation or defeat the purpose and intent of this standard.

    (b) Construction. All construction methods shall be in conformance 

with



[[Page 124]]



accepted engineering practices to insure durable, livable, and safe 

housing and shall demonstrate acceptable workmanship reflecting 

journeyman quality of work of the various trades.

    (c) Structural analysis. The strength and rigidity of the component 

parts and/or the integrated structure shall be determined by engineering 

analysis or by suitable load tests to simulate the actual loads and 

conditions of application that occur. (See subparts E and J.)

    (d) [Reserved]

    (e) New materials and methods. (1) Any new material or method of 

construction not provided for in this standard and any material or 

method of questioned suitability proposed for use in the manufacture of 

the structure shall nevertheless conform in performance to the 

requirements of this standard.

    (2) Unless based on accepted engineering design for the use 

indicated, all new manufactured home materials, equipment, systems or 

methods of construction not provided for in this standard shall be 

subjected to the tests specified in paragraph (g) of this section.

    (f) Allowable design stress. The design stresses of all materials 

shall conform to accepted engineering practice. The use of materials not 

certified as to strength or stress grade shall be limited to the minimum 

allowable stresses under accepted engineering practice.

    (g) Alternative test procedures. In the absence of recognized 

testing procedures either in these standards or the applicable 

provisions of those standards incorporated by reference, the 

manufacturer electing this option shall develop or cause to be developed 

testing procedures to demonstrate the structural properties and 

significant characteristics of the material, assembly, subassembly 

component or member. Such testing procedures shall become part of the 

manufacturer's approved design. (Refer to Sec.  3280.3.)

    (1) Testing procedures so developed shall be submitted to the 

Department for approval.

    (2) Upon notification of approval, the alternative test procedure is 

considered acceptable.

    (3) Such tests shall be witnessed by an independent licensed 

professional engineer or architect or by a recognized testing 

organization. Copies of the test results shall be kept on file by the 

manufactured home manufacturer.



[40 FR 58752, Dec. 18, 1975. Redesignated at 44 FR 20679, Apr. 6, 1979, 

as amended at 58 FR 55005, Oct. 25, 1993; 59 FR 2469, Jan. 14, 1994]



    Effective Date Note: At 70 FR 72043, Nov. 30, 2005, Sec.  3280.303 

was amended by revising paragraph (g), effective May 30, 2006. For the 

convenience of the user, the revised text follows:



Sec.  3280.303  General requirements.



                                * * * * *



    (g) Alternative test procedures. In the absence of recognized 

testing procedures either in the Standards in this part or in the 

applicable provisions of those standards incorporated in this part by 

reference, the manufacturer electing this option must develop or cause 

to be developed testing procedures to demonstrate the structural 

properties and significant characteristics of the material, assembly, 

subassembly component, or member, except for testing methods involving 

one-piece metal roofing as would be required in Sec.  

3280.305(c)(1)(iii). Such testing procedures become part of the 

manufacturer's approved design. Such tests must be witnessed by an 

independent licensed professional engineer or architect or by a 

recognized testing organization. Copies of the test results must be kept 

on file by the manufactured home manufacturer.