Abstract
This paper reports the calculation me thod for flexural cracking capac ity of precast plain concrete and reinforced concrete products. The specification published by the Japan Society of Civil Engineers suggests that the flexural cracking strength of concrete member depends on the depth of beam and is governed by the ratio of the depth to characteristic length derived from fracture energy. But the equation for flexural cracking strength is not able to apply to most of precast co ncrete products because of its small dimension. For establishing performance based design for precast concrete products, fracture energy tests of concrete with thin section and loading tests for actual products were carried out. And the relationship between flexural cracking strength and tensile strength that covered every section was proposed in this paper.
