Frame scaffolding is one of the most widely used scaffolds in construction scaffolding. The reason why it is called a gantry scaffold is that its main frame is in the shape of "door".

Also called eagle frame or gantry frame. This kind of scaffolding is mainly composed of main frame, cross frame, cross brace, foot plank, adjustable base and so on. Frame scaffolding is a construction tool first developed successfully in the United States in the late 1950s. It has many advantages such as simple assembly and disassembly, move easily, good bearing capacity, safe and reliable use, and good economic benefits, so developing fastly.

By the 1960s, Europe, Japan and other countries have introduced and developed frame scaffolding. The use of frame scaffolding is the most widespread in Europe, Japan, and other countries, accounting for about 50% of various scaffolding, and countries have also established a lot of professional companies that produce various systems of portal scaffolding.

Since the 1970s, China has introduced frame scaffolding systems from countries such as Japan, the United States, and the United Kingdom, and applied them in some high-rise building projects, achieving good results. It can not only be used as an internal and external scaffold for construction, but also as a floor, beam formwork support, and mobile scaffold, with more functions, so it is also known as a multifunctional scaffold.