Fire Performance of Interstitial Space Construction Systems.
Fire Performance of Interstitial Space Construction
Lawson, J. R.
NBSIR 85-3158; 163 p. May 1985.
Sponsor:Veterans Administration, Washington, DC
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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fire endurance; fire tests; interstitial spaces; NFPA
251; steel structures; floors; lightweight concretes
Two unique walk-on deck construction systems were
exposed to the standard NFPA 251 time-temperature fire
exposure for periods up to two hours in order to
evaluate their fire performance. A large scale steel
structure was used in the test program to simulate
construction systems found in the field. The structure
consisted of two large functional floors separated by an
interstitial space in which a walk-on deck was suspended
from the top functional floor. One of the walk-on deck
systems was constructed from lightweight concrete, and
the second was built with poured gypsum. Critical
components evaluated were the top functional floor,
unprotected steel work in the interstitial space, the
walk-on deck system, and protection for a heavy steel
column located in the center of each test bay. Test
data were compared with the fire endurance test
requirements of NFPA 251. Computer predictions also
were made using the FIRES-T3 model to determine its
ability to accurately predict the construction system
performance. The interstitial construction system
achieved the design fire endurance.