Is there any way to estimate fire endurance of floors or to design for it without running an actual test?
The Portland Cement Association has compiled data for use in design that are based on extensive systematic testing. Data have been published in a paper by M. S. Abrams and A. H. Gustaferro, "Fire Endurance of Two-course Floors and Roofs," Journal of the American Concrete Institute, February 1969, pages 92-102.