The major failure mode of reinforced concrete slabs subjected to a concentrated load on the small loading area is governed by punching shear. After the first study of Talbot in 1913, many research works have been carried out to investigate the mechanism and to derive a punching shear load equation. In Japan, the empirical equation analyzed statistically by Kakuta et al, has been used to be the most appropriate one to explain test results. However, it seems to be unappropriate to explain the

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... hing shear load of one-way slabs using a rectangular loading pad. The authors have derived an equation applicable to one-way slabs also, which is composed of the ultimate shear strength in compression zone along the perimeter of the loaded area and the splitting strength of bottom covers induced by the dowel force of reinforcement.