Fire Resistance of Steel Deck Floor AssembliesU.S. Government Printing Office, 1967 - 22 pages Tests were conducted to determine the resistance to fire of welded steel plate and beam floor assemblies with various conditions of floor covering on the plates, and ceiling protections beneath the beams. The trials included fire exposures from the burnout of combustible materials ranging from 10 to 40 lb/sq ft on the floor surface as well as standard fire endurance tests in which the ceiling of the structure was exposed to fire. The results of the tests indicated that the use of steel floor structures was practical from considerations of fire safety. For the test conditions established, fire exposure on top of the floor did not heat the structural steel supporting members sufficiently to cause load failure or collapse, and did not produce untenable conditions in the room below. In tests involving fire exposure to the underside of floors, the fire endurance times, based solely on heat transmission criteria, ranged from 1 hr 24 min to over 4 hr. Temperature levels attained by the structural members and deflection of the floor assemblies are also reported. (Author). |
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1:3 fibered gypsum 1:3 gypsum-sand plaster 1/2:3 gravel concrete 7.7 Continuous lb applied load approximately beam flanges bottom flange Building Science Series Bureau of Standards burnout room burnout tests cantilevered beams center of span clipped to beams combustible materials crete curves end 5-ft Expanded metal floor F MAX FAHRENHEIT failure fibered gypsum-sand plaster fire exposure period fire tests floor assemblies floor covering floor plates floor structure floor surface gypsum hollow tile gypsum shoe tile heat hr:min F I-beams in/hr insulating lb/ft² linoleum lower flange maximum deflection metal floor binder metal lath clipped National Bureau PC MAX pig iron plaster Exp portland cement rate of deflection reinforced gyp Restrained at ends restraining frame ribbed metal lath rods sand plaster standard fire Steel Deck Floor steel floor structural members sum tile tack welded TEMPERATURE IN DEGREES temperature of 1000 Test 11 test floor tests of steel thermocouples unexposed surface
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Page 17 - A 1.7.) (1982) fire test exposure severity — a measure of the degree of fire exposure; specifically in connection with Methods E 1 19, E 152, and E 163, the ratio of the area under the curve of average furnace temperature to the area under the standard time-temperature curve, each from the start of the test to the end or time of failure, and above the base temperatures 68°F (20°C). (1976...