Scaffoldings do not leave the support of some scaffolding accessories, in particular the construction scaffolding, higher request of spare parts, therefore, some construction scaffolding accessories price than usual scaffold fittings price are higher.

But different types of scaffolding, needed parts are different, the following doors scaffold, for example, talk about doors scaffold is one of the most widely used in construction scaffolding. Because the frame is other type; Door & throughout; so called the door or frame type scaffold, also known as scaffolding or gantry. The scaffold is mainly composed of main frame, horizontal box, cross brace, scaffolding, adjustable base, etc. Gantry scaffolding first developed by the United States, it has the tear open outfit simple, bearing performance good, safe and reliable use, etc, are developing fast.

By the '60 s, Europe, Japan and other countries has introduced and developed the scaffolding. generally, 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. Door type steel pipe scaffold outside not only can be used as a scaffold, also can be used as a scaffold or bunch of scaffolding. however, despite the fastener scaffold with disassembling flexible, convenient transportation, strong commonality, etc, and they are widely used in our country in scaffold engineering, its usage accounted for more than 60%, is the most current usage, application of the most common kind of scaffolding.

But, this kind of scaffolding safety guarantee is poorer, construction efficiency is low, can not adapt to the needs of the development of basic construction project.