Experimental Analyses for Estimating Strength and Stiffness of Shear Walls in Wood-Framed Construction Minoru OKABE　*1 Naohito KAWAI　*2 Seiji TAKADA　*3 KEY WORDS Shear wall, Yield strength, Wood-frame construction ABSTRUCT One of the prominently important performance required for shear wall of wood-framed construction system should be to resist against the lateral forces subjected to wind or seismic load, and the shear strength and stiffness of wall are assessed on the basis of experimental results or results of calculation in accordance with the design guide to wood-framed construction in Japan. As to the specified calculation method in the guide for estimating shear strength and stiffness of wall, the properties of nailed joints and sheathing materials are dominant factor to correlate the also specified experimental results objected to a full-sized wall components. However, very limited experimental qualitative information pertaining to relationship between the result of calculation and experiment is available.In this situation, this paper firstly shows the results on the properties of nailed joint and sheathing material and then shows the results of test determining the strength and stiffness of the shear wall according to the specified method for assessment in guide. Data obtained from two experimental approaches the followings could be concluded; Calculated yield strength is approximately agreed with the experimental yield strength, and experimental stiffness is 65% of calculated stiffness. *1. Tsukuba Building Test laboratory, Center for Better Living, Japan *2. Evaluation System Division, Building Research Institute, Ministry of construction, Japan *3. Japan 2×4 Home Builders Association, Japan World Conference on Timber Engineering, 2000, Canada