In foreign trade procurement or project supervision, judging whether a set of scaffolding is “qualified” goes far beyond simply checking its appearance. Its inherent material properties, structural logic, and detailed construction are the key factors determining the safety of the scaffolding.
First, the raw materials for the scaffolding must be strictly controlled upon arrival on site.
Zero tolerance for defects in members: Pay attention to whether the steel pipes have severe corrosion (especially the inner wall), bending, cracks, or illegal openings. These defects will directly weaken the cross-section of the members, significantly reducing their compressive and bending resistance.
The quality of couplers is crucial: Couplers (right-angle, swivel, and butt joints) must be free of cracks and deformation. Bolts must be intact, and the tightening torque must be strictly controlled within 40-65 N·m (checked with a torque wrench). This is the basis for ensuring the semi-rigidity of the joints.
Second, the scaffolding structure and erection must be precise.
This is the core of the inspection; any deviation may lead to the redistribution of internal forces and instability.
Uprights and Horizontal Bars: Verticality deviation of uprights must be controlled throughout the entire process; longitudinal and transverse horizontal bars should be straight to ensure effective load transfer.
Nodes and Ground Bracing: All fasteners must be securely tightened; longitudinal and transverse ground bracing must be installed at the bottom ≤200mm from the ground, which is crucial for ensuring the stability of the scaffold’s “root.”
Scissor Bracing System: The installation of scissor bracing (such as width, angle, and overlap) must strictly adhere to the plan. It is the “backbone” against horizontal forces; the width should not be less than 4 spans and ≥6m, and the angle should be between 45°-60° (according to JGJ 130 and other standards).
Top Free End: The extension length of adjustable supports must not exceed 300mm; the cantilever section of the upright must be strictly controlled, which is key to preventing local buckling.
Spacing and Step Distance: The longitudinal and transverse spacing of uprights and the step distance of horizontal bars must be completely consistent with the specific construction plan, representing the physical embodiment of load calculations.
Third, the connection and protection of scaffolding are indispensable external guarantees for survival.
Foundation and Ties: The foundation must be firm and level, with base plates/bases under the uprights. Tall scaffolding structures must be equipped with reliable “column bracing” or wall ties according to the plan, and must not be mixed with construction scaffolding.
Safety Protection: Complete edge protection and fall protection nets at the working level are the last line of defense.
Safe scaffolding is a collaborative effort of design, materials, workmanship, and management. A deep understanding of these control points is essential to mitigating risks from the outset.
Post time: Jan-12-2026