Portal scaffolding is one of the most widely used scaffolds in construction. Because the main frame is the "gate" type, it is called the door type or the door type scaffold, also known as the hawk or the gantry frame. This kind of scaffold is mainly composed of main frame, transverse frame, cross bracing, footpad and adjustable base. The door type scaffold is first developed in the United States. It has the characteristics of simple assembly, good performance and safe and reliable operation.
By the 1960s, Europe, Japan and other countries introduced and developed the scaffolding.
Since the 1970s, China has introduced the gate scaffolding system from Japan, the United States, Britain and other countries, and has been applied in some high-rise construction projects. It can not only be used as inside and outside scaffolding for construction, but also can be used as floor, beam formwork and mobile scaffolding, so it is also called multi-functional scaffold. Portal scaffolding is a kind of construction tool that the United States first developed in the late 1950s. Because it has the advantages of simple installation and dismantling, mobile, good bearing, safe and reliable, and good economic benefit, it is developing very fast. To the early '60 s, Europe, Japan and other countries successively application and development of this kind of scaffolding, in Europe, Japan and other countries, most doors scaffold usage, about 50% of all kinds of scaffolding, and countries also established many doors scaffold professional company producing all kinds of system. Since the late 1970s, China has introduced such scaffolding from Japan, the United States, the United Kingdom and other countries. It has been applied in some high-rise construction projects to achieve better results.
In the early 80 s, some domestic and manufacturers begin to generic scaffolding door, until 1985 years later, has successively established 10 scaffold factory door, door scaffold in some parts of the construction project, started a large number of popularization and application, and by the vast number of construction units welcome. However, due to different product specifications and different quality standards, it is difficult for the construction unit to use and manage the work. At the same time, because of some factory adopts the material of steel pipe and specifications do not conform to the requirements of the design, door frame stiffness is small, weight is big, transportation and use of easy deformation, machining accuracy is poor, short service life, so that seriously affected the promotion of the new technology.
In the 90 s, this kind of scaffolding without development, applied in the construction of less and less, instead many doors scaffold factory closed or halt production, only a few processing and continue to produce good quality unit. Therefore, it is necessary to combine the architectural features of our country to develop a new type of door frame. Portal scaffold
Portal scaffolding is one of the most widely used scaffolds in construction. Because the main frame is the "gate" type, it is called the door type or the door type scaffold, also known as the hawk or the gantry frame. This kind of scaffold is mainly composed of main frame, transverse frame, cross bracing, footpad and adjustable base.
Basic component editing
Scaffold door is the door frame, cross support, connecting rod, hanging button scaffolding or horizontal planes, arm lock and so on basic structure, set up horizontal reinforcing rod, bracing, sweeping bar, sealing bar, bracket and base, and USES the even wall connected to the main body structure of a standard steel tube scaffold. Portal steel tubular scaffolds can not only be used as external scaffolds, but also can be used as interior scaffolds or full scaffolding.
Use the editor
1. Used in building, hall, bridge, viaduct, tunnel, etc.
2. Scaffold of exterior and exterior grid of high-rise buildings.
3. Used for electromechanical installation, hull repair and other decoration engineering activities platform.
4. Using the portal scaffolding, it can be used as a temporary site dormitory, warehouse or shed.
5. To set up temporary viewing tables and stands.