The reuse system proposed by authors is one of methods to reduce environmental burden in the structural field. As for reusable members, we take up building steel structures used for plants and warehouses without fire protection. These buildings are assumed to be demolished within approximately 30 years. In this paper performance of steel structural members of a gable frame is evaluated by non destructive test for reuse. First, profile of a gable frame and characteristics of steel structural members are shown. Next, tensile strength is estimated using hardness obtained by non destructive test. Weldability is also estimated by carbon equivalent and weld crack sensitivity composition, measuring chemical compositions by non destructive test. Finally, the material of steel structural members for reuse is estimated as a result of tests.
