[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: 24CFR3280.207]



[Page 120-121]

 

                 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 C_Fire Safety

 

Sec.  3280.207  Requirements for foam plastic thermal insulating 

materials.



    (a) General. Foam plastic thermal insulating materials shall not be 

used within the cavity of walls (not including doors) or ceilings or be 

exposed to the interior of the home unless:

    (1) The foam plastic insulating material is protected by an interior 

finish of \5/16\-inch thick gypsum board or equivalent material for all 

cavities where the material is to be installed; or

    (2) The foam plastic is used as a sheathing or siding backerboard, 

and it:

    (i) Has a flame spread rating of 75 or less and a smoke-developed 

rating of 450 or less (not including outer covering of sheathing);

    (ii) Does not exceed \3/8\-inch in thickness; and

    (iii) Is separated from the interior of the manufactured home by a 

minimum of 2 inches of mineral fiber insulation or an equivalent thermal 

barrier; or

    (3) The foam plastic insulating material has been previously 

accepted by the Department for use in wall and/or ceiling cavities of 

manufactured homes, and it is installed in accordance with any 

restrictions imposed at the time of that acceptance; or

    (4) The foam plastic insulating material has been tested as required 

for its location in wall and/or ceiling cavities in accordance with 

testing procedures described in the Illinois Institute of Technology 

Research Institute (IITRI) Report, ``Development of Mobile Home Fire 

Test Methods to Judge the Fire Safe Performance of Foam Plastic, J-

6461,'' or other full-scale fire tests accepted by the Department, and 

it is installed in a manner consistent with the way the material was 

installed in the foam plastic test module. The materials shall be 

capable of meeting the following acceptance criteria required for their 

location.

    (i) Wall assemblies. The foam plastic system shall demonstrate 

equivalent or superior performance to the control module as determined 

by:

    (A) Time to reach flashover (600 [deg]C in the upper part of the 

room);

    (B) Time to reach an oxygen (O2) level of 14% (rate of 

O2 depletion), a carbon monoxide (CO) level of 1%, a carbon 

dioxide (CO2) level of 6%, and a smoke level of 0.26 optical 

density/meter measured at 5 feet high in the doorway; and

    (C) Rate of change concentration for O2, CO, 

CO2 and smoke measured 3 inches below the top of the doorway.

    (ii) Ceiling assemblies. A minimum of three valid tests of the foam 

plastic system and one valid test of the control module shall be 

evaluated to determine if the foam plastic system demonstrates 

equivalent or superior



[[Page 121]]



performance to the control module. Individual factors to be evaluated 

include intensity of cavity fire (temperature-time) and post-test 

damage.

    (iii) Post-test damage assessment for wall and ceiling assemblies. 

The overall performance of each total system shall also be evaluated in 

determining the acceptability of a particular foam plastic insulating 

material.

    (b) All foam plastic thermal insulating materials used in 

manufactured housing shall have a flame spread rating of 75 or less (not 

including outer covering or sheathing) and a maximum smoke-developed 

rating of 450.



    Effective Date Note: At 70 FR 72043, Nov. 30, 2005, Sec.  3280.207 

was amended by revising paragraph (a)(4) introductory text, effective 

May 30, 2006. For the convenience of the user, the revised text follows:



Sec.  3280.207  Requirements for foam plastic thermal insulating 

          materials.



    (a) * * *

    (4) The foam plastic insulating material has been tested as required 

for its location in wall and/or ceiling cavities in accordance with 

testing procedures described in the Illinois Institute of Technology 

Research Institute (IIT) Report, ``Development of Mobile Home Fire Test 

Methods to Judge the Fire-Safe Performance of Foam Plastic Sheathing and 

Cavity Insulation, IITRI Fire and Safety Research Project J-6461, 1979'' 

or other full-scale fire tests accepted by HUD, and it is installed in a 

manner consistent with the way the material was installed in the foam 

plastic test module. The materials must be capable of meeting the 

following acceptance criteria required for their location:



                                * * * * *