- Author
- Ryan, J. V. | Robertson, A. F.
- Title
- Proposed Criteria for Defining Load Failure of Beams, Floors, and Roof Constructions During Fire Tests.
- Coporate
- National Bureau of Standards, Washington, DC
- Journal
- Journal of Research of the National Bureau of Standards. C. Engineering and Instrumentation, Vol. 63C, No. 2, 121-124, October/December 1959
- Keywords
- beams | floors | roofs | construction | fire tests | failure
- Identifiers
- load failure criteria; effect of new criteria on previously determined failure times; increase in rate of deflection; deflection and rate of deflection method
- Abstract
- A brief account is presented of procedures used in development of criteria for defining the point at which fire test specimens fail to sustain load during test. It is proposed that both a deflection of L2/800d and an hourly rate of deflection of L2/150d be taken as an indication of load failure. In these formulas, L is the span between supports of the member or element found to be critical under fire exposure, and d is the distance between upper and lower extreme fibers of the particular structural component or assembly.