Scaffolding and formwork support for different purposes are used for different types of engineering construction. Most bridge support frames use bowl buckle scaffolding, and some use portal scaffolding. The main structure construction floor scaffold mostly uses fastener scaffolds. The vertical distance of the scaffold poles is generally 1.2~1.8m, and the horizontal distance is generally 0.9~1.5m.
Compared with the general structure, the scaffold produced by World Scaffolding has the following characteristics:
1. The variability of the load is large;
2. The fastener connection node is semi-rigid, and the rigidity of the node is related to the quality of the fastener and the installation quality, and the performance of the node has a large variation;
3. There are initial defects in the structure and components of the scaffolding, such as the initial bending and corrosion of the rods, the erection size error, and the eccentricity of the load.
4. The connection point with the wall has a large constraint variation on the scaffolding. The research on the above problems lacks systematic accumulation and statistical data, and does not have the conditions for independent probability analysis. Therefore, the adjustment coefficient of the structural resistance multiplied by less than 1 is determined by calibration with the previously adopted safety factor. Therefore, the design method adopted in this specification is essentially half-probability and half-empirical. It is the basic condition of design calculation that the scaffold meets the structural requirements specified in this code.
Post time: Jan-07-2022