(1) The width of each cross bracing should not be less than 4 spans, and should not be less than 6m, and the inclination angle between the diagonal bar and the ground should be between 45 ° and 60 °.(2) The length of diagonal bar of cross bracing shall be overlapped or butted. When the overlapped connection is adopted, the lap length shall not be less than 1m, and it shall be fixed with not less than 2 rotating fasteners. The distance from the edge of the end fastener cover plate to the end of the bar shall not be less than 100 mm