Experimental and theoretical studies were carried out to develop general methods for the prediction of the fire resistance of reinforced concrete columns. In these studies, which were carried out jointly between the National Research Council of Canada and the Portland Cement Association, 41 columns were tested. The parameters studied included load level, amount of steel reinforcement, effective length of column, concrete strength, moisture content, area and shape of cross section, aggregate type, axial restraint of ther mal expansion and load eccentricity. The experimentally discovered effects of these parameters are discussed.
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