Currently in many countries it has formed various forms of steel tubular scaffold for sale , and became one of the current application template scaffold most common.

1930s, the Swiss invented the adjustable steel pillar , which is a single-tube strut using solenoid device can adjust the height of the steel struts. Because of this pillar has a simple structure , flexible assembly and disassembly , etc. , in various countries have been widely used. There are two kinds of its structure enclosed screw and screw exposed .

Compared with the thread exposed steel pillar , screw enclosed steel pillar , mortar and other dirt adhesion preventing thread, thread protection , and are not being damaged in the use and handling of other advantages. Therefore, the thread enclosed steel pillars application of the more common in some European countries.

Since the 1980s, in order to increase the use of steel pillars feature has been improved in many countries on the turntable and top accessory steel pillars , make use of steel pillars feature greatly increases , as well as at the bottom of the triangle

attached to a collapsible scaffolding, the single- tube strut can be installed independently , is more conducive to dismantle construction steel pillars .