There are several ways to build external frames.

External scaffolding refers to scaffolding erected on the periphery of the building. External scaffolding is widely used, including all kinds of floor-standing external scaffolding, hanging scaffolding, pick scaffolding, hanging scaffolding, etc. Usually erected on the periphery of a building. External scaffolding is mostly used for external wall masonry, facade decoration and reinforced concrete engineering.

2. Climbing frame

Climbing frame is also called lifting frame. According to its power source, it can be divided into hydraulic type, electric type and hand-pulled type. It is a new scaffolding system developed in recent years, which is mainly used in high-rise shear wall buildings. It can climb up and down.

This system has completely changed the scaffolding technology: first, there is no need to turn over the shelf; Second, the dismantling process of scaffolding is omitted (once assembled, it will be used until the construction is completed), and it is not limited by the height of the building, which greatly saves manpower and material resources. Moreover, from the perspective of safety, the traditional scaffolding has been greatly improved. It has great development advantages in high-rise buildings.

Extended data

Compared with the general structure, the working conditions of scaffolding have the following characteristics:

1, with large load variability;

2. The fastener joint is semi-rigid, and the joint stiffness is related to the fastener quality and installation quality, and the joint performance is quite different;

3. There are initial defects in scaffold structures and components, such as initial bending and corrosion of members, large error in erection dimensions, eccentric load, etc.

4, and the connection point of the wall, scaffolding binding variation is bigger. The research on these problems lacks systematic accumulation and statistical data, and does not have the conditions for independent probability analysis. Therefore, the value of the structural resistance less than 1 multiplied by the adjustment factor is determined by the previously adopted safety factor calibration.

Therefore, the design method adopted in this specification is semi-probabilistic and semi-empirical in nature. It is the basic condition of design and calculation that scaffolding meets the structural requirements specified in this specification.

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