[Code of Federal Regulations]
[Title 24, Volume 5]
[Revised as of April 1, 2001]
From the U.S. Government Printing Office via GPO Access
[CITE: 24CFR3280.206]

[Page 118]
 
                 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. 3280.206  Firestopping.

    (a) Firestopping of at least 1-inch nominal lumber, \5/16\-inch 
thick gypsum board, or the equivalent, shall be provided to cut off 
concealed draft openings between walls and partitions, including furred 
spaces, and the roof or floors, so as to retard vertical movement of 
fire. In particular, such concealed spaces must be constructed so that 
floor-to-ceiling concealed spaces on one floor do not communicate with 
any concealed space on another floor, any concealed spaces in the floor, 
or any concealed space in the roof cavity. A barrier must be installed 
to prevent communication between adjacent concealed spaces.
    (1) Where the barrier is vertical, it must be made of exterior or 
interior covering(s) equivalent to that used on the nearest exposed wall 
surface; and
    (2) In all other cases, the barrier must be made of 1-inch nominal 
lumber, \5/16\-inch thick gypsum board, or the equivalent.
    (b) A space does not lose its character as a concealed draft opening 
if it is filled with insulation or other material or if it is blocked by 
a barrier other than as required by paragraph (a) of this section.
    (c) All openings for pipes and vents and other penetrations in 
walls, floors, and ceilings of furnace and water heater spaces shall be 
tight-fitted or firestopped. Pipes, vents, and other penetrations are 
tight-fitted when they cannot be moved freely in the opening.