This paper presents the influence of slip at the horizontal construction joint which exists at the slab bottom of precast SRC beam on structural characteristics. The experiment for sixteen specimens with T-shaped section whose principal parameters were the stirrup ratio, main bar ratio, steel size, and bond state of horizontal joint was carried out. Although the precast specimens slipped along the horizontal joint before the final loading, the roughened surface and the transverse reinforcement bars were effective to decrease the amount of slippage. A method to estimate flexural strength, when slip occurred at the joint, is proposed based on general superposed strength method considering slip strength.
