A.應(yīng)在兩端按規(guī)定設(shè)置連墻件和橫向斜撐加固 B.可采取安全防護(hù)措施 C.應(yīng)按規(guī)定設(shè)置剪刀撐 D.應(yīng)設(shè)置卸荷措施
A.50mmB.80mmC.100mmD.200mm
A.不小于300mm B.不小于400mm C.不小于500mm D.不大于500mm