I. Materials are the “Genes” of Safety:
Strict control of component defects from the moment of arrival: Pay attention to whether the steel pipes have severe corrosion (especially the inner wall), bending, cracks, or illegal openings. These defects directly weaken the cross-section of the components, significantly reducing their compressive and bending resistance. Coupler quality is crucial: Couplers (right-angle, swivel, 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.
II. Structure is the “Skeleton” of Load Bearing:
Precise erection is the core of acceptance; any deviation can lead to internal force redistribution 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. Joints 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” resisting 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.
III. Connections and Protection:
The “Environment” for Survival: External Protection is Essential: Foundation and Ties: The foundation must be firm and level, with pads/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.
Acceptance Standards are the Language of Quality and the Basis of Contracts. Attention should be paid to the factory’s raw material inspection reports, production process control, and whether the products comply with national standards such as GB/T 13793 and GB 15831, or target market standards such as EN 12811 and AS/NZS 1576. Acceptance should be based on the specific plan and safety technical standards such as JGJ/T 231 (disc-lock scaffolding) and JGJ 130 (coupler-type), using instruments and tools (such as spirit levels and torque wrenches) for quantitative inspection, and video records should be kept. Safe scaffolding is a collaborative work of design, materials, processes, and management. Only by deeply understanding these control points can risks be avoided at the source.
Post time: Mar-20-2026