Fire Performance of Selected Residential Floor Constructions Under Room Burnout Conditions. Interim Report.
Fire Performance of Selected Residential Floor
Constructions Under Room Burnout Conditions. Interim
Fang, J. B.
NBSIR 80-2134; 79 p. December 1980.
Sponsor:Department of Housing and Urban Development, Washington,
Available from:: National Technical Information Service
(NTIS), Technology Administration, U.S. Department of
Commerce, Springfield, VA 22161.
1-800-553-6847 or 703-605-6000;
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Order number: PB81-144404
fire endurance; fire tests; flame through; floors;
furniture; interior finishes; joists; room fires;
A series of seven large-scale room burnout fire tests
was conducted with a set of selected residential
floor-ceiling assemblies to provide data on the
performance of the assemblies; these will be compared
with the results in future tests on the same
constructions in a fire endurance furnace. Four
wood-frame and three light gage steel-frame,
load-bearing assemblies, each measuring 3.7 x 3.7 m in
size, were exposed from the underside to a fire
environment produced from the burning of typical
furniture and interior finish materials in a room. the
fire resistance periods based on flame-through of floor
assembly and structural failure of floor joists varied
from 10 to 12 minutes for floors with unprotected wood
joists and was 4 minutes or less for floors with
unprotected steel joists. The addition of a 12.7 mm
thick gypsum board ceiling as a protective layer
increased the fire resistance time of the steel joisted
floor assembly approximately 12 minutes.