Construction frame scaffolding has been developing at a rapid pace and has been undergoing changes through many eras, firstly in the 1960s when it was introduced and developed in Europe, Japan and other countries. This kind of scaffolding is construction scaffolding, one of the most widely used scaffolding, until the 90s, this kind of scaffolding has not been developed, in the construction of the application rather less and less, many door scaffolding factory closed or converted, only a few processing quality units continue to produce. Therefore, it is necessary to develop new types of portal scaffolding in combination with the characteristics of our construction. It has also been developing, the production of door scaffolding has certain requirements

1. China has my international system of units as the legal unit of measurement, so the development of portal scaffolding standards, should be unified using legal units of measurement, the abolition of the imperial system units.

2. the width of the door frame and the distance between the frame should be unified provisions, in order to facilitate the mutual use of the products of various plants. The height of the gantry should be specified in principle, but not necessarily completely unified.

3. in line with the principle of unified standards, the products of each factory can have their own characteristics, and minimize the variety of product specifications.

4. in order to ensure that the door scaffolding can be processed according to the standard production, it is recommended that the relevant departments to organize the steel pipe production plant specifically for the production of thin-walled steel pipe for the door frame.

The above is a unified standard for the production of products, which has the characteristics of simple disassembly and assembly, good load-bearing performance, safe and reliable use, etc., the development of a rapid pace.