Evaluate methods of short-term basic shear strength of a gable roof diaphragm in experiment and in calculation are inconsistent because these methods are assumed to be different yield mode. The evaluation method for shear performance of a gable roof diaphragm in the experimental procedure and in the calculation procedure with the assumption of same yielding mode is presented in this paper. When the maximum strength of a roof diaphragm is due to yielding nail joints between panel and rafter, short-term basic shear strength per unit length of a roof diaphragm is verified that well agrees regardless of pitch of roof and size by experiments and numerical analyses.
