It is difficult to define the weight of a steel pipe. In general, the reduction of wall thickness has a greater impact on the bearing capacity in compression than in tension.

When the steel pipe is in tension, its failure is strength failure, and the design value of the axial tension it can bear is N=Axf, where A is the sectional area of the steel pipe, and f is the design value of the strength of the steel pipe. The reduction of the wall thickness of the steel pipe will inevitably lead to the reduction of the sectional area of the steel pipe, which will lead to the reduction of the axial tension value of the steel pipe. When the steel pipe is under pressure, its failure is stability failure, and the design value of the pressure it can bear is: N= φ xfxA。

Generally, the distance between upright poles is between 60 cm and 120 cm. The reason for this standard is that the upright pole is an integral part of the scaffold project, and there are many requirements for the spacing and connection of the upright pole. For example, the vertical pole must be connected with butt fasteners and cannot be overlapped. Make the force between the rods evenly distributed, and enhance the overall stability. Double-row fastener-type steel pipe scaffold is a spatial structural system composed of large cross bars, small cross bars, upright bars, wall-connecting members and shear-supporting members and connected with fastener nodes. The butt joints of two adjacent poles shall not be in synchronization, and the staggered distance of butt joints along the vertical direction shall not be less than 50 cm; The distance between the center of each joint and the main node should not be more than one-third of the step distance. The top of the pole shall be equipped with adjustable support. If there is a gap between the U-shaped support and the two sides of the ridge beam, it must be wedged tightly. The screw shall not extend more than 20 cm from the top of the steel pipe, the gap between the outer diameter of the screw and the inner diameter of the pole shall not be more than 3 mm, and the outer diameter of the screw shall not be less than 36 mm. During installation, it shall be ensured that the upper and lower parts are concentric.