First, scaffolding foundation acceptance:
(1) Standard requirements:
The foundation ground must be flat and firm, without obvious settlement or cracks.
The compaction coefficient of the backfilled soil foundation must be ≥0.94;
Wooden or rigid pads should be used for the foundation base, with a contact area ≥0.15㎡.
(2) Material matching recommendations:
Traditional wooden pads are prone to moisture and deformation, which can lead to uneven foundation stress over long-term use. Scaffolding-specific rigid pads, made of Q235 steel with anti-corrosion surface treatment, not only meet the requirements of “length ≥2 spans, contact area meeting standards,” but also avoid the wear and tear of wooden pads, extending their service life while ensuring stable foundation bearing capacity.
Second, acceptance of scaffold uprights:
(1) Specifications
Verticality deviation: ≤ 1/200 of the scaffold height;
Joint connections: Butt-joint couplers must be used. Adjacent upright joints must not be located within the same span. For two adjacent joints separated by one upright within the same span, the height distance must be staggered by ≥ 500 mm, and the distance from the center of each joint to the main node must be ≤ 1/3 of the step distance.
(2) Common problems and solutions
On-site, problems such as “joints in the same span” and “insufficiently tightened couplers” frequently occur. Upright butt-joint couplers are certified according to GB15831-2006 standard. When the coupler bolt tightening torque reaches 40-65 N·m, the anti-slip bearing capacity is ≥ 8 kN, and there are positioning marks at the joints, which can help on-site workers avoid the error of “joints in the same span” and improve acceptance efficiency.
Third, acceptance of scaffold horizontal members:
(1) Specification requirements
Main horizontal members: installed inside the uprights, with a length ≥ 3 spans; butt couplers are staggered, and the joints of two adjacent main horizontal members must not be located in the same span or at the same level; the distance from the center of the joint to the main node is ≤ 1/3 of the span.
Small horizontal members: arranged close to the uprights, resting on the main horizontal members, and fastened with right-angle couplers; when using bamboo scaffold boards, the spacing between small horizontal members is ≤ 400mm.
Step distance: ≤ 1.8m, longitudinal spacing ≤ 2m.
(2) Selection logic
The straightness of the horizontal members directly affects the force transmission. The main horizontal members are cold-drawn, with a straightness deviation of ≤ 1mm/m. When used with right-angle couplers, the vertical connection between the horizontal members and the uprights can be ensured, reducing the problem of localized force concentration caused by “horizontal member tilt”.
Fourth, acceptance of scaffolding couplers:
(1) Specifications
Material: Couplers should be made of malleable cast iron or cast steel, and their mechanical properties should comply with GB15831. Couplers with cracks, deformation, or stripped threads are strictly prohibited.
Tightening torque: 40 N·m ~ 65 N·m.
(2) Quality Control Advantages
Each batch of couplers undergoes mechanical performance testing. The destructive load resistance is ≥25 kN, and the anti-slip bearing capacity is ≥8 kN. Bolts are galvanized, providing better rust prevention than the industry average, reducing torque attenuation caused by coupler corrosion.
Fifth, Acceptance of Scaffold Wall Ties:
(1) Specification Requirements
Layout: Should be installed close to the main nodes, with a distance ≤300mm from the main nodes.
Type: Rigid wall ties are preferred; when flexible wall ties are used, top bracing must be used, and the tension strength of the wire ropes should meet the design requirements.
Quantity: Not less than the design quantity. For scaffolds with a height below 24m, wall ties should be installed in 3 steps and 3 spans.
(2) Engineering Practice Suggestions
Flexible wall ties are easily affected by the environment; it is recommended to prioritize the use of rigid wall ties.
Sixth, Acceptance of Scissor Bracing:
(1) Specification Requirements
Layout: Continuously installed along the entire height of the outer side of the scaffold, with a width ≥4 spans;
Angle: The angle between the diagonal brace and the ground should be between 45° and 60°.
Extension: Using lap joints, with a lap length ≥1m, and 3 swivel couplers should be installed at equal intervals for fixing. The distance from the edge of the end coupler cover plate to the end of the pole should be≥100mm.
(2) Performance Support
The diagonal bracing of the scissor bracing must possess good bending resistance. The diagonal bracing is made of Q235B steel, with cross-sectional dimensions meeting design requirements. The swivel couplers at the overlaps have a high degree of compatibility with the diagonal bracing, ensuring effective force transmission and preventing reinforcement failure due to “diagonal bracing bending.”
Seventh, Scaffold Board Acceptance:
(1) Specification Requirements
Material: Rotten, broken, or deformed scaffold boards must not be used; steel scaffold boards should be made of Q235 steel, with an anti-slip texture on the surface.
Fixing: Bamboo scaffold boards should be laid with the main bamboo reinforcement perpendicular to the longitudinal horizontal bars, laid flat, and fixed to the longitudinal horizontal bars at the four corners with galvanized steel wire of diameter ≥1.2mm; steel scaffold boards should be hooked to the transverse horizontal bars or fixed with bolts.
(2) Core Advantages of Steel Scaffolding Planks
Compared to traditional bamboo scaffolding planks, steel scaffolding planks have significant advantages:
① Material: Q235 galvanized steel, free from corrosion and breakage, with a service life of 5-8 years;
② Anti-slip: The plank surface is stamped with anti-slip textures, with a friction coefficient ≥0.6, preventing slippage even in rainy weather;
③ Fixing: Equipped with hooks or bolt holes, allowing for direct and reliable connection to crossbars, preventing “scaffolding plank displacement”;
④ Compliance: Fully compliant with JGJ130 specifications, requiring no additional rectification during on-site acceptance, saving construction time.
Post time: Apr-29-2026