楼承板安装注意事项
Precautions for installation of floor bearing plate
钢结构柱网间距一般5~9.0m×8~15m，次梁间距3m，而楼承板下料长度为4.97~8.97m，运输与安装均较困难，尤其是带由圆弧区垂直吊装楼承板，由上而下在次梁狭间穿套比较困难，且打乱了次梁焊接正常工序。控制下料长度为3～6m，则可避免垂直运输时在次梁间无法吊运的问题。 楼承板吊运时采用专用软吊索。每次吊装时应检查软吊索是否有撕裂、割断现象。楼承板搁置在钢梁上时应防止探头。铺料时操作人员应系安全带，并保证边铺设边固定在周边安全绳上。 焊接采用熔透点焊连接，施焊前应准备边角料引弧试焊，调整施焊电流.因楼承板底部无水平模板及垂直支撑，浇筑混凝土时布料不宜太集中，采用平板振捣器及时分摊振捣。
The spacing of steel structure column net is generally 5 ~ 9.0m × 8 ~ 15m, and the spacing of secondary beam is 3M, while the blanking length of floor bearing plate is 4.97 ~ 8.97m, so it is difficult to transport and install, especially to lift the floor bearing plate vertically from the arc area, it is difficult to penetrate the sleeve from top to bottom between the secondary beam slits, and the normal welding process of secondary beam is disrupted. If the cutting length is controlled to be 3-6M, the problem that it can not be lifted between secondary beams during vertical transportation can be avoided. Special soft sling shall be used for lifting the floor bearing plate. Check whether the soft sling is torn or cut during hoisting. The probe shall be prevented when the floor bearing plate is placed on the steel beam. The operator shall fasten the safety belt and ensure that it is fixed on the surrounding safety rope while laying. Penetration spot welding shall be adopted for welding. Before welding, start arc test welding of leftover materials shall be prepared and welding current shall be adjusted. Since there is no horizontal formwork and vertical support at the bottom of the floor bearing plate, the distribution of concrete shall not be too centralized, and plate vibrator shall be used to timely distribute vibration.