Portal scaffolding is a kind of scaffolding built in factories. It is one of the most widely used scaffolding in the world today. It can not only be used as an external scaffold, but also as an internal scaffolding or full scaffolding. Portal steel tubular scaffolding is widely used in construction of buildings, bridges, tunnels and metros because of its standardized geometry, reasonable structure, good mechanical performance, easy installation and disassembly, safety, reliability, economy and practicability. If wheels are placed under the portal scaffolding, it can also be used as mechanical and electrical installation, painting and equipment. Maintenance, advertising production activities platform.
The erection of portal steel tubular scaffolding generally needs only construction according to the service load and erection stipulations listed in the product catalogue, and no checking calculation is needed. If the actual usage is different from the regulations, corresponding reinforcement measures or checking computations should be adopted. Generally, the erection height of portal steel tube scaffolding is limited to 45 m, and it can reach about 80 m after taking certain measures. The values of construction load are generally: 1.8kN/ of uniform load, or the concentrated load acting on the span of the scaffold plate 2kN.
Portal steel pipe scaffolding is a tool-type standard component made of common steel pipe material, which is assembled in the construction site. Its basic unit is composed of a portal frame, two pairs of scissors, a pair of horizontal beam frame and four connectors. Several basic units are vertically stacked through the connector and buckle up the arms to form a multi-storey frame. In the horizontal direction, the adjacent elements are connected into a whole by the reinforcement bar and the horizontal beam frame, and the outer scaffolding connected with the upper and lower steps is composed of inclined ladder, balustrade column and cross bar.
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