Through the bending test of 10 sets of node "L" with different tenon joint size of Catalpa single straight tenon structure, finding out the straight mortise tenon joint size that could be able to withstand the maximum load. What' s more, some detail analysis of tenon joint node were carried out based on a trial basis of finite element analysis. And by comparing the impact of 3 directions of different size of the node force, we concluded that increasing the width of the te...