1. Clarify Construction Requirements: Achieve Precise Matching Between Scaffolding and Project
Scaffolding selection must be closely combined with project characteristics to avoid a one-size-fits-all approach. The following information should be clearly defined:
Project Type and Height
- Low-rise buildings (≤24m): Priority is given to floor-standing scaffolding (such as coupler-type and cuplock scaffolding), which is simple to erect and low-cost, suitable for wall construction and internal and external decoration.
- High-rise buildings (>24m): It is recommended to adopt attached lifting scaffolding (lifts with the floor, saving materials) or cantilever scaffolding (bearing by section steel, avoiding the risk of floor foundation compression).
- Special structures (such as bridges and chimneys): It is necessary to adopt full scaffolding (fully enclosed support, suitable for large-span and high-altitude operations) or suspended scaffolding (suspended by ropes, suitable for curved structures).
Operation Scope
- Heavy operations (such as concrete pouring and steel structure installation): Choose interlocking/disc-lock scaffolding (high node strength, large load-bearing capacity, and firm connection between crossbars and vertical poles).
- Light operations (such as painting and pipeline laying): Choose frame scaffolding (quick to assemble and disassemble, suitable for short-term and mobile operations).
2. Based on Load Requirements: Ensure Bearing Safety
The loads that scaffolding needs to bear include permanent loads (self-weight) and variable loads (construction personnel, materials, tools, wind loads, etc.). The load-bearing capacity must be confirmed through design calculation before selection.
Basic Requirements
The load-bearing capacity must comply with the "Unified Standard for Safety Technology of Scaffolding in Construction" (GB51210), that is: Structural self-weight + construction live load ≤ design limit (for example, the axial force limit of interlocking scaffolding vertical poles is usually 15–30kN).
Special Load Handling
- Areas with concentrated material stacking (such as masonry working surfaces): Reduce the spacing of vertical poles (e.g., from 1.5m to 1.2m) or adopt heavy-duty scaffolding (such as cuplock scaffolding with higher node shear strength).
- Strong wind areas (coastal areas, high altitudes): Calculate the wind load according to the maximum wind speed once in 50 years in the local area, and add wind-resistant tie rods or reduce the spacing of vertical poles if necessary.
3. Verify Material Quality: Eliminate Hidden Dangers from the Source
Scaffolding materials are the foundation of safety and must be strictly screened:
Core Material Standards
- Steel pipes: Adopt φ48.3×3.6mm welded steel pipes with wall thickness deviation ≤0.3mm; no rust (rust depth ≤0.5mm), bending (vertical pole bending ≤1/1000, horizontal pole bending ≤1/200), or cracks.
- Couplers: Adopt malleable cast iron (KT33‑8) without air holes or cracks; the bolt tightening torque is controlled at 40–65N·m (too loose is easy to slip, too tight is easy to break).
- Scaffold planks: Wooden scaffold planks with thickness ≥50mm and no decay; steel scaffold planks should have anti-skid stripes and be firmly fixed at both ends.
On-site Inspection
Materials must be accompanied by factory certificates and test reports, and sampled for inspection after arrival (such as coupler anti-slip and anti-damage performance tests). Unqualified materials are strictly prohibited from being used.
4. Environmental Adaptability: Avoid External Risks
The construction site environment directly affects the stability of scaffolding, and selection should be targeted:
Terrain and Foundation
- Soft foundation (backfill soil, paddy fields, etc.): Floor-standing scaffolding should be hardened (lay C20 concrete cushion with thickness ≥100mm) or adopt cantilever method to prevent foundation settlement.
- Edge operations (balconies, foundation pit surroundings): Set up guardrails (height ≥1.2m) and toe boards (height ≥180mm); fully hang dense mesh safety nets (flame-retardant type, mesh density ≥2000 meshes/100cm²) outside the scaffolding.
Climatic Conditions
- Alpine/low-temperature areas: Choose weather-resistant materials (such as hot-dip galvanized steel pipes for rust prevention); lay anti-slip mats (sacks, rubber mats) on scaffold planks in winter.
- Rainy areas: Set a drainage slope of ≥3% at the bottom of scaffolding vertical poles to prevent water accumulation from soaking the foundation.
Post time: 2026-03-02 09:14:05