14 wood shear walls and 2 diaphragms were tested. The specimens were made according to common light frame wood engineering practices in China. All the specimens were tested under monotonic load protocol. Finite element analysis was executed to extend study of the shear walls. Furthermore

a method for calculating lateral stiffness based on displacements was provided. The studies verified that the lateral stiffness and strengths of shear walls were proportion to the lengths. The lateral stiffness and strengths of perforated and gypsum board sheathed shear walls were studied

and the methods to improve stiffness and strengths of the walls were compared. The stiffness and strengths of unblocking floor diaphragm were studied. It is found that sheathings of diaphragm transfer shear loads and most moment loads

while the maximum slips of sheathingtoframing joints of diaphragm were found in unblocking edges of sheathings in corner areas. Some other useful conclusions were also obtained in the study.