www.1o13.cn-欧美精品黑人性xxxx,草莓视频在线观看在线观看视频,免费一级欧美片在线观看欧美,国产精品视频免费看

Steel support which requests should fit?

Guangzhou Steel tells you: steel support which requests should fit?
1. Guangzhou Steel components can be used to support the convergence of high-strength weld or bolt adapter;
2. waist beam convergence node should be set at the support point adjacent to, and should not exceed 1/3 of the distance support;
3. The steel beam waist and row of piles, should choose between underground successive wall not less than C20 fine aggregate concrete infill; convergence node steel and steel support beam waist should be set stiffener.