Different types of engineering construction uses different use scaffolds. Most of the bridge support racks use bowl buckle scaffolding, and there are also door frames. Most of the main structure construction scaffolding scaffolding scaffolding scaffolding, the vertical distance of the scaffolding rod is generally 1.2 ~ 1.8m; the horizontal distance is generally 0.9 ~ 1.5m.
Compared with the general structure, scaffolding has the following characteristics:
1. The load is more variant;
2. The connection node of the buckle is semi -rigid, and the rigidity of the node is related to the quality of the fastener and the quality of the installation.
3. Initial defects of scaffolding structures, components, such as the initial bending, rust of the pole, the size error, the load -bearing eccentricity, etc.
4. The connection point with the wall, the restrained mutation of the scaffolding is greater. The research on the above problems lacks system accumulation and statistical data, and does not have the conditions for independent probability analysis. Therefore, the value of the structural resistance multiplied by the adjustment coefficient of less than 1 is determined by the safety factor used by the previously adopted. Therefore, the design method used in this specification is essentially semi -probability and semi -experience. The structural requirements of the scaffolding to meet the requirements of this specification are the basic conditions for design and calculation.
