In the field of construction, scaffolding acceptance is the core link of “safety first”. According to the “Construction Safety Inspection Standard” (JGJ59), about 30% of high-altitude fall accidents are directly related to non-standard scaffolding acceptance.
1. Scaffolding foundation acceptance: bearing capacity and pads are the core, and standard data must be rigidly implemented
(1) Standard requirements According to Section 5.2 of the “Safety Technical Specifications for Coupler-Type Steel Pipe Scaffolding in Construction” (JGJ130-2011): The foundation ground must be flat and solid, without obvious settlement (allowable settlement ≤10mm) and cracks; the backfill foundation compaction coefficient ≥0.94 (using the ring knife method for detection); the pads are wooden pads (length ≥2 spans, thickness ≥50mm) or rigid pads (such as channel steel), and the contact area with the foundation is ≥0.15㎡.
(2) Building material adaptation suggestions: Traditional wooden pads are easily affected by moisture and deformed, and long-term use will lead to uneven foundation stress. Our scaffolding special rigid pads are made of Q235 steel and have an anti-corrosion treatment on the surface. They not only meet the requirements of “length ≥ 2 spans and contact area meeting the standard”, but also avoid the loss of wooden pads, extend the service life, and ensure the stability of the foundation bearing capacity.
2. Scaffolding pole acceptance: verticality and joint arrangement determine the overall stability of the frame
(1) Specification requirements
Vertical deviation: ≤ 1/200 of the frame height (e.g., 20m frame, deviation ≤ 100mm);
Joint connection: Butt fasteners must be used (overlap is strictly prohibited), and adjacent pole joints must not be set in sync; two adjacent joints separated by one pole in the sync are staggered in height by ≥ 500mm, and the distance from the center of each joint to the main node is ≤ 1/3 of the step distance.
(2) Common problems and solutions
The problems of “joints in the same sync” and “insufficient fastener tightening” often occur on-site. The fasteners for the vertical poles are certified according to the GB15831-2006 standard. When the fastener bolts are tightened to a torque of 40-65N·m, the anti-slip bearing capacity is ≥8kN. There are positioning marks at the joints to help on-site workers avoid the error of “joints in the same span” and improve the efficiency of acceptance.
3. Acceptance of scaffolding crossbars: step distance and connection method affect the lateral force transmission
(1) Specification requirements
Large crossbars: set on the inside of the vertical poles, with a length of ≥3 spans; the fasteners are staggered, and the joints of two adjacent large crossbars shall not be set in the same span or the same span. The distance from the center of the joint to the main node is ≤1/3 of the span;
Small crossbars: arranged close to the vertical poles, placed on the large crossbars, and fastened with right-angle fasteners; when using bamboo scaffolding boards, the spacing between small crossbars is ≤400mm;
Step distance: ≤1.8m, longitudinal distance ≤2m.
(2) Building material selection logic
The straightness of the crossbar directly affects the force transmission. Our large crossbars adopt the cold drawing process, and the straightness deviation is ≤1mm/m. When used with right-angle fasteners, it can ensure the vertical connection between the crossbar and the vertical pole, reducing the problem of local force concentration caused by “crossbar tilt”.
4. Scaffolding fastener acceptance: material and torque to avoid the risk of “connector failure”
(1) Specification requirements
Material: Fasteners should be made of malleable cast iron or cast steel, and their mechanical properties should comply with the provisions of GB15831. It is strictly forbidden to use fasteners with cracks, deformation, or stripped threads.
Tightening torque: 40N·m～65N·m (torque wrench is required for on-site inspection).
(2) Our quality control advantages
Each batch of our fasteners undergoes mechanical performance testing, with an anti-destructive load of ≥25kN and an anti-slip bearing capacity of ≥8kN. The bolts are galvanized, and the anti-rust performance is better than the industry average, which can reduce the torque attenuation problem caused by fastener corrosion.
5. Acceptance of scaffolding wall ties: Reliability of the “attachment point” to prevent the frame from becoming unstable
(1) Specification requirements
Layout: should be set close to the main node, with a distance of ≤300mm from the main node;
Type: rigid wall ties (such as steel pipes, steel sections) are preferred; when flexible wall ties (such as wire ropes) are used, they must be equipped with top supports, and the tensile strength of the wire ropes must meet the design requirements.
Quantity: must not be less than the design quantity. For scaffolds with a height of less than 24m, the wall ties should be set in 3 steps and 3 spans.
(2) Engineering practice recommendations
Flexible wall ties are easily affected by the environment (such as wire rope corrosion). It is recommended to use rigid wall ties first. Our rigid wall connection kit includes connecting plates, bolts, top braces, and other accessories. It can be directly and reliably connected to the building structure during installation without the need for on-site processing, which improves the acceptance rate.
6. Acceptance of scaffolding scissor braces: The key to “overall reinforcement” is that they must be continuous at full height
(1) Specification requirements
Layout: Continuously set along the full height of the outer side of the scaffolding, with a width of ≥4 spans (or ≥6m);
Angle: The inclination angle between the diagonal rod and the ground should be between 45° and 60°.
Length extension: Use overlap, with an overlap length of ≥1m, and 3 rotating fasteners should be set at equal intervals to fix them. The distance from the edge of the end fastener cover plate to the rod end should be ≥100mm.
(2) Building material performance support
Scissor brace diagonal rods must have good bending resistance. Our scissor brace diagonal rods are made of Q235B steel, and the cross-sectional dimensions meet the design requirements. The rotating fasteners at the overlap are highly matched with the diagonal rod, which can ensure effective force transmission and avoid reinforcement failure caused by “diagonal rod bending”.
7. Acceptance of scaffolding boards: The safety of the “working platform” must be strictly controlled from the material to the fixing.
(1) Specification requirements Material: Do not use rotten, broken, or deformed scaffolding boards; bamboo scaffolding boards should be made of moso bamboo or nanmu bamboo, with a thickness of ≥50mm; steel scaffolding boards should be made of Q235 steel, and the board surface should be provided with anti-slip lines; Fixing: Bamboo scaffolding boards should be laid with the main bamboo reinforcement perpendicular to the longitudinal horizontal bar, butted and laid flat, and the four corners should be fixed to the longitudinal horizontal bar with galvanized steel wire with a diameter of ≥1.2mm; steel scaffolding boards should be hung on the transverse horizontal bar with hooks or fixed with bolts.
(2) The core advantages of our steel springboards. Compared with traditional bamboo scaffolding, our steel springboards have obvious advantages:
① Material: Q235 galvanized steel, no decay or breakage problems, service life can reach 5-8 years (bamboo scaffolding only 1-2 years);
② Anti-slip: the board surface is stamped with anti-slip grooves, the friction coefficient is ≥0.6, and it can prevent slipping even on rainy days;
③ Fixation: It comes with hooks or bolt holes, which can be directly connected to the crossbar reliably to avoid “scaffolding displacement”;
④ Compliance: It fully complies with the requirements of JGJ130 specifications. No additional rectification is required during on-site acceptance, saving construction time. Conclusion: Acceptance is the bottom line, building materials are the foundation, and professional matching can eliminate hidden dangers. Scaffolding acceptance is not “formalism”, but a responsibility for the lives of construction workers. From the foundation to the scaffolding, every link must be strictly in line with the standards. Choosing our compliant products, such as steel springboards, fasteners, and pads, is equivalent to “paving the way in advance” for acceptance – professional building materials can not only reduce rectification costs, but also build a solid safety line from the source.
Post time: Sep-25-2025