Fire Performance of an Interstitial Space Construction System.
Fire Performance of an Interstitial Space Construction
Lawson, J. R.; Braun, E.; DeLauter, L. A.; Roadarmel, G.
NISTIR 5560; 65 p. February 1995.
Sponsor:Army Corps of Engineers, 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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interstitial spaces; structural systems; fire endurance;
fire research; fire tests; floor systems
An interstitial space building construction assembly,
consisting of a walk-on deck suspended from above by
structural steel which also supported a functional
floor, reproduce a design planned for use in a new
hospital complex at Elmendorf Air Force Base, Alaska.
This interstitial space assembly was built in the
multi-story steel test structure at the National
Institute of Standards and Technology. The construction
assembly was tested by the same protocol used to
evaluate the Veteran's Administration interstitial space
construction assembly, tested in 1984. This protocol
followed the National Fire Protection Association's,
NFPA 251 Fire Tests of Building Construction and
Materials Standard, 1990 edition. Fire testing of the
interstitial space system was carried out during the
summer of 1994. This construction assembly met the
requirements for a 2 hour fire endurance rating. The
maximum surface temperature on the unexposed functional
floor above the interstitial space reached 33 deg C (91
deg F) at the end of the two hour period. The maximum
structural steel temperature inside the interstitial
space was 123 deg C (253 deg F). The structural
assembly was evaluated for a total of 2 hours and 30
minutes before the test was terminated.