Scaffold is used in construction scaffolding, one of the most widely used of the scaffold. Because the frame show "frame" word, so called the frame or gate type scaffold, also known as scaffolding or dragon frame. 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.

Since the 70s, China has imported from Japan, the United States, Britain and other countries frame scaffolding system, and applied in high-rise building construction. It not only can be used for the construction of the internal and external scaffold, and can be used for floor, beam formwork and movable scaffolding, etc., with more functions, say again so multi-function scaffold. Scaffold is the United States in the 50 s first successfully developed a kind of construction tools.

Because it has a simple installation, mobile party then, carrying sex good, safe and reliable use, as well as good economic benefit, so developing rapidly. To 60 s, Europe, Japan and other home application and development of this kind of scaffolding, successively in Europe, Japan and other countries, most frames scaffold usage, about 50% of all kinds of scaffolding, and countries also established many frames scaffold professional company producing all kinds of system. Beginning in the late 70 s, China successively introduced from Japan, the United States, Britain and other countries use this kind of scaffolding, in some application in the high-rise building construction, achieved good results.

In the early 80 s, some domestic and manufacturers begin to generic scaffolding frame, until 1985 years later, has successively established 10 scaffold factory frame, frame scaffold in parts of the construction engineering, began a large number of popularization and application, and by the vast number of construction units welcome.