Scaffold tubing is another name for the coupler steel scaffolding, which is easy to build and dismantle and flexible to erect, also characterized as high strength, strong rigidity and numerous turn-over ratio. The scaffold tubing is most widely used in the construction project because of its easy level in the processing requirement, low-cost investment at one time, and of economical property.
It can be built for the well frame, platform bearing the working material and viaduct bridge in addition to the use of building the scaffolding system. However, every coin has two sides. Most of the its couplers (including the bolts rod and nuts) are apt to brittle and loss, the fastening levels of the bolts differ greatly from each other and joints within the force function line have some defects of deviation in the interchanging distance.