1. 1) JIS Z2101-94, “Methods of tests for woods” (1994) Japanese Standards Association, Tokyo.
2. 2) ASTM D143-94, “Standard methods of testing small clear specimens of timber” (1997) American Society for Testing and Materials, West Conshohocken.
3. 3) Forest Experiment Station, “300 kinds of serviceable timbers” (1975) Nihon Mokuzai Kakou Gijutu Kyokai, Tokyo.
4. 4) B. M. Radcliffe and S. K. Suddarth, “The notched beam shear test for wood”, Forest Products Journal, Vol.5, No.4, pp.131- 135 (1955).