Cinder Concrete Floor Construction Beams

This paper treats of the special form of cinder concrete fire-proof floor construction between steel beams which is used extensively in New York City and elsewhere. It comprises a brief general discussion of the characteristics of the material, with reference to fire resistance, corrosion, strength, etc. The major portion, however, deals with the results of an extensive series of tests on cinder concrete, plain and reinforced, both in the form of cylinders and typical slabs, as a means of obtaining sufficient accurate basic data for use in compiling possible future regulations. The tests were conducted by the Department of Civil Engineering, Columbia University, partly in co-operation with the Bureau of Buildings, Borough of Manhattan, New York City.