In procurement or project supervision, judging whether a set of scaffolding is “qualified” goes far beyond simply checking its new appearance. Its inherent material properties, structural logic, and detailed construction are the key factors determining the safety of the scaffolding.
First, scaffolding materials are the “genes” of safety:
Zero tolerance for defects in scaffolding members: Pay attention to whether steel pipes have severe corrosion (especially on the inner wall), bending, cracks, or illegal openings. These defects directly weaken the cross-section of the scaffolding members, significantly reducing their compressive and bending resistance.
The quality of scaffolding couplers is crucial: Scaffolding 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 foundation for ensuring semi-rigid joints.
Second, the scaffolding structure is the “skeleton” of load-bearing: This is the core of scaffolding acceptance; any deviation can lead to internal force redistribution and instability.
Scaffolding Uprights and Horizontal Bars: Verticality deviation of uprights must be controlled throughout the entire structure; longitudinal and transverse horizontal bars should be straight to ensure effective load transfer.
Scaffolding Joints and Ground Bracing: All scaffolding 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.”
Scaffolding Scissor Bracing System: The installation of scaffolding 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).
Free Ends at the Top of Scaffolding: The extension length of adjustable supports must not exceed 300mm; the cantilever section of the uprights must be strictly controlled, as this is key to preventing local buckling.
Scaffolding 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 the “environment” for survival:
Scaffolding foundation and ties: The foundation must be firm and level, with base plates/bases under the uprights. Tall scaffold structures must be equipped with reliable “column ties” or wall ties according to the plan, and must not be mixed with construction scaffolding.
Scaffolding safety protection: Complete edge protection and fall protection netting at the working level are the last line of defense.
Post time: Feb-26-2026