Study on Static & Dynamic Bending Strength of Compressed Lumber and the Utilization for Reinforcement.

Japanese cedar is the most important conifer for reforestation in Japan. Recently, compression process upon lumbers are expected to be an effective way to progress the mechanical property and able to extend the uses of Japanese cedar. This study evaluated the static & dynamic bending strength of compressed Japanese cedar lumber (compressed lumber) and tried to progress the bending strength of Al alloy shape by compressed lumber as the reinforcement. As the results, bending strength of compressed lumbers are equal to the A class lumber used for structures by the regulation of JAS (Japanese Agricultural Standard). Bending strength of Al alloy shape can be progressed by compressed lumber.