Patent ID: 8429868

Claim:
A lateral displacement preventing member that can be disposed in a horizontal joint portion of exterior wall boards that are fastened to an angular corrugated metal backing material while being joined together by shiplap joint on four sides and that is used to prevent lateral displacement of the exterior wall boards, the lateral displacement preventing member comprising: a flat plate-like upper fixing plate; an upper abutment plate that is provided upright at approximately right angles to the upper fixing plate; a lower fixing plate that is extended from a lower end of the upper fixing plate and disposed approximately parallel to the upper fixing plate in a position forward of the upper fixing plate; and a lower abutment plate that is provided upright at approximately right angles to the lower fixing plate, wherein a back-side locking piece that extends from the lower end of the upper fixing plate downward and parallel to the lower fixing plate is provided, and when the lateral displacement preventing member is disposed in the horizontal joint portion, an upper horizontal portion of a first fastening member that is disposed in a vertical joint portion of the exterior wall boards is inserted between the back-side locking piece and the lower fixing plate.