【名词&注释】
建筑物(building)、钢管脚手架(steel pipe scaffold)、悬挑脚手架(overhanging scaffolding)、外脚手架(outside scaffold)、附着式升降脚手架(attached vertically moving scaffold)、落地脚手架
[多选题]外脚手架宜根据建筑物的高度选择合理的形式()
A. 低于50m的建筑,可采用落地脚手架或悬挑脚手架
B. 高于50m的建筑,优先采用附着式升降脚手架(attached vertically moving scaffold)、悬挑脚手架
C. 落地脚手架宜采用双排扣件式钢管脚手架和门式钢管脚手架
D. 悬挑脚手架宜采用双排扣件式钢管脚手架或碗扣式、盘扣式钢管脚手架