1. To meet the requirements of rapid construction of main steel structure, it can provide a firm working platform in a short period of time, and it can use multiple floors to lay profiled steel sheets and pour concrete slabs in layers for running water construction.
2. In the use stage, the floor bearing plate is used as the tensile reinforcement of the concrete floor slab, which also improves the rigidity of the floor slab and saves the consumption of reinforcement and concrete.
3. The embossing on the surface of the profiled plate can produce the maximum binding force between the floor bearing plate and the concrete, so that the two can form a whole, and the floor bearing plate system is equipped with stiffening ribs, so that the floor bearing plate system has high strength and bearing capacity.
4. Under the cantilever condition, the floor bearing plate is only used as a permanent template. The cantilever length can be determined according to the cross-sectional characteristics of the floor bearing plate. In order to prevent the cantilever plate from cracking, it is necessary to match negative reinforcement at the support according to the design of structural engineer.
Floor bearing plate refers to the profiled steel plate not only as the permanent formwork of the concrete floor, but also as the lower stress reinforcement of the floor to participate in the stress calculation of the floor, working together with the concrete to form a composite floor.
Performance of composite floor slab: save a lot of temporary formwork, all or part of formwork support, reduce the concrete consumption, reduce the permanent load of the structure, which is more important for high-rise buildings and earthquake areas, save a lot of labor in transportation, stacking and installation, and reduce the workload It is convenient for laying communication, electric power, heating and other pipelines. It can also lay insulation, sound insulation, heat insulation, vibration isolation and other materials to improve the floor performance and give full play to the good tensile strength and ductility of steel and the excellent compressive strength and greater rigidity of concrete.
Precautions for installation of floor bearing plate:
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.
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