Scaffolding refers to various scaffolds for workers to operate and handle vertical and horizontal transportation at construction sites. General terminology in the construction industry refers to the construction site used in the external wall, internal decoration or high-rise can not be directly constructed in the center. Mainly for the construction of workers up and down work or periphery safety net enclosure and high-altitude installation components, it is clear that the scaffolding manufacturing materials are usually: bamboo, wood, steel pipes or synthetic materials. Some projects also use scaffolding as a template, in addition to advertising, municipal, transportation, roads and bridges, mines and other departments are widely used.
Scaffolds and formwork supports are chosen for different types of engineering construction. Most of the scaffolds used in the bridge are bowls and scaffolds. In the construction of main structure, fastener scaffolding is mostly used. The vertical distance of scaffolding vertical bar is generally 1.2-1.8 m, and the horizontal distance is usually 0.9-1.5 M.
Compared with ordinary structures, scaffolds have the following characteristics:
1, the load variation is large.
2. Fastener joint is semi-rigid, and its rigidity is related to fastener quality and installation quality. The performance of the joint varies greatly.
3. The scaffolding structure and components have initial defects, such as initial bending, corrosion, erection size error, load eccentricity and so on.
4, the binding point with the wall has a larger variation on scaffolding. The study of the above problems lacks systematic accumulation and statistical data, and does not have the conditions of independent stopping probability analysis. Therefore, the value of structural resistance multiplied by an adjustment coefficient less than 1 is accurately determined by the stopping calibration of the safety factor previously used. Therefore, the design method adopted in this code is in fact a semi probabilistic and semi empirical one. Scaffolding meets the requirements of the rules and regulations is the basic requirement for design calculation.
标签:   脚手架 移动脚手架 脚手架厂家 梯形脚手架 门式脚手架