The Kyoto Protocol for preventing global warming has come into effect, and the Cabinet Council was decided on the amount of carbon dioxide exhaust to be reduced in Japan. Moreover, the recycling of demolition waste wood is mandated under the “Construction Material Recycling Law” as one of the mechanisms for Japan to form the recycling society. The law encourages the utilization of demolition waste wood as a raw material for wood-based panels as the main recycling method. However, because the amount of demolition waste wood generated from wooden houses is at least twice as high as the demand for wood-based panels, the development of new demand is needed to accomplish the goal. In this study, oriented strand lumber made from crushed demolition waste wood was developed, and the properties were examined. As a result, the developed oriented strand lumber had uniform physical properties, and preservative and anti-termite processing has no apparent detrimental effect. In order to evaluate the feasibility of the developed oriented strand board, it is necessary to consider the performance of nail joints and the effects of actual use conditions. When the materials are used in an actual structure, it is important to understand how the strength performance may change as a result of the conditions under which the structure was built, long-term use, and so on.

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