The stiffness and capacity of nailed sheathed shear walls are calculated by assuming that sheets don't buckle. There is no way to predict the critical stress of shear buckling of nailed sheathed shear walls. The effect of shear buckling is not considered in the examination of sheets against shear failure when structural design of high strength sheathed shear walls is carried out. Two formulae are experimentally found in this paper: one formula is to predict the critical stress of shear buckling considering the restriction of rotation along edges of sheets with nails; the other is to express the relation between shear strength of plywood sheets and critical stress of shear buckling in nailed sheathed shear walls
