Topic Fastening is possible inside the building, the construction metallic parts whose it is easy also for the rear of the completing to fasten for the second time, are offered.SolutionsThe metallic parts of the subjective section, in order to prevent idling, it consists of the configuration of the nail of the washer and volt/bolt and the auxiliary role which are made to unify. While featuring that by beam side it locks the metallic parts of left and right 2 subjective sections with volt/bolt, and the nail it fastens in inside through volt/bolt from outside column side, it is tightening battledore volt/bolt. Choice figure Drawing 1
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