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This paper is concerned with the influence of furnace design and operation on fire resistance ratings. Consideration is given to such factors as radiation and convection heat transfer, furnace pressure and gas flow, and dimensional effects.
As a result of this investigation, it is concluded that the total intensity of fire exposure maintained in the ASTM Methods E 119 furnace may not be affected seriously by furnace design so long as the thermocouples that control and indicate furnace temperature have approximately the same exposure to the fire as the specimen being tested. However, differences in furnace pressure and specimen size may cause serious differences in fire endurance test results.
fire tests, furnace tests, fire endurance, furnaces, design, fire resistance, evaluation, tests
Seigel, L G
Associate research consultant, Applied Research Laboratory, U.S. Steel Corp., Monroeville, Pa.