Patent attributes
A pair of displacement restricting members are fixed to a support member. When the support member is viewed from above, the displacement restricting members include reference end portions, respectively, which are positioned on a setting straight line set on an upper surface of the support member. The pair of displacement restricting members is fixed to the upper surface of the support member so that the reference end portions are directed in directions opposite to each other in a direction along the setting straight line. The end portion of the truss includes a pair of abutment surfaces facing the reference end portions, respectively. A gap is present in at least any one of a region between the reference end portion of one displacement restricting member and one abutment surface and a region between the reference end portion of the other displacement restricting member and the other abutment surface.
