(L)的比值: • Floor framing: 1/360;楼面框架:1/360; • Roof framing: 1/240;屋面框架:1/240; • Purlins, girts and corrugated steel cladding for inaccessible roof: 1/180; • 不上人屋面的檩条和波浪形的钢覆层:1/180; • Crane runway beams: 1/800;吊车轨道梁:1/800; • ...
Then, roof frame units 10 are arranged parallel, combined by girders 5, purlins and the like, and roof members are installed thereon. And after a bending is generated to the truss beams 1 by the constant load of the dead load of the members, nuts are screwed on the screws at both ...