| 摘要 |
PROBLEM TO BE SOLVED: To provide a junction structure and a fixture such that a through hole is hardly formed even in heating.SOLUTION: Two members which have hollow parts and are made of synthetic resin include incombustible fire-resistant reinforcement members in the hollow parts, and the members are mutually butt-welded. At least one of the two members includes a heat-expanding refractory material which foams over between the two members when heated. |
