日本欧美一区二区三区不卡视频_亚洲欧美日韩中文字幕一区二区_日韩免费视频一区二区_欧美黑人粗大猛烈18p

Guangzhou Steel teach you: General steel construction hole and limb protection

Guangzhou Steel teach you: General steel construction hole and limb protection

1, the side length or diameter of the hole should be 20cm ~ 40cm rigid protective cover plate; edge length or diameter of the hole should be 40cm ~ 150cm erection of steel scaffolding, scaffold boards paved; edge length or diameter of the hole at 150cm above Zhang set up should be a safety net dense mesh fence and added protection.
2, after the building floor hoisting steel beams, partitions should be laying safety net.
3, after hoisting steel beams surrounding floor is completed, should be set up in each limb fence, and the fence height not less than 1.2m.
4, limb scaffold erection, operating platform, network, and other security challenges in the structure should be securely fixed. Guangzhou Steel