Tests on shear corrugated steel plates were carried out to examine effect of shape and thickness of cross section on end failure action that may occur at the ends of flutes in shear diaphragms. Based on the test result and observation obtained through this research, previous deformation model for stiffness estimation were reviewed, and the deformation model were developed into strength model with application of yield line hinge. Strength design formulas were derived from the strength model using a limit analysis technique. Comparison with the test results showed that the derived formulas provided appropriate stiffness and strength estimation.