A.应在两端按规定设置连墙件和横向斜撑加固 B.可采取安全防护措施 C.应按规定设置剪刀撑 D.应设置卸荷措施
A.50mm B.80mm C.100mm D.200mm
A.不小于300mm B.不小于400mm C.不小于500mm D.不大于500mm