如扣件式钢管模板支架的步距为1.8m,相邻两立杆的对接接头不在同步时,对接接头沿竖向错开的距离不得小于(),各接头中心距主节点的距离不应大于().
A.500mm,600mm B.500mm,900mm C.300mm,600mm D.500mm,150mm正确答案A
如扣件式钢管模板支架的步距为1.8m,相邻两立杆的对接接头不在同步时,对接接头沿竖向错开的距离不得小于(),各接头中心距主节点的距离不应大于().
A.500mm,600mm B.500mm,900mm C.300mm,600mm D.500mm,150mm正确答案A