《建筑施工承插型盘口式钢管支架安全技术规程》JGJ231-2010,挂扣式钢梯宜设置在尺寸不小于( )的脚手架框架内。
A.1.0m*1.8m B.0.9m*1.8m C.0.9m*1.5m D.1.2m*1.8m正确答案B
《建筑施工承插型盘口式钢管支架安全技术规程》JGJ231-2010,挂扣式钢梯宜设置在尺寸不小于( )的脚手架框架内。
A.1.0m*1.8m B.0.9m*1.8m C.0.9m*1.5m D.1.2m*1.8m正确答案B
