亚洲国产精品无码久久98温泉中出,国产精品久久久久久黄无码,被俩个黑人前后破苞的女人,99久久久无码国产精品66

Guangzhou Steel teach you: hoisting steel construction zone safety of the general provisions

Guangzhou Steel teach you: hoisting steel construction zone safety of the general provisions

1, lifting the region should set the security cordon, non-staff prohibited from entering.
2, lifting objects hanging from the ground 200mm ~ 300mm, should conduct a comprehensive inspection, and should officially lifted after confirmation.
3, when the wind speed reaches the 10m / s, should stop lifting work; when the wind speed reaches the 15m / s, shall lifting work.
4, high-altitude work using small hand tools and small parts should be taken to prevent the fall approaches.
5, the construction of electricity should be consistent with the current industry standard "construction site temporary electrical safety specifications" JGJ 46 of the relevant provisions.
6, the construction site should be professional personnel to install, maintain and handle electrical equipment and power lines.
7, every day hanging member when finished floor or roof is not installed on to, to be taken and reliable way for temporary fixing.
8, the pressure plate surface water, ice, frost or snow, should be promp