梭形屋架为角钢及圆钢组成的空间桁架,是一种新型屋架。煤炭工业部编制有标准设计,其上弦为一根两股朝上的角钢,下弦为两根分开的圆钢;铁道部编制有通用图,其上弦为两根平行的角钢,下弦亦为圆钢。前者屋架的 The shuttle truss is a space truss composed of angle steel and round steel and is a new type of roof truss. The Ministry of Coal Industry has a standard design with a two-stranded angle steel for the top chord and two separate round steels for the bottom chord. The Ministry of Railways has a general drawing with two parallel angles on the top and a round bottom chord. . The former truss