1. Scaffold Upright Erection: Upright spacing is approximately 1.50m. This spacing may be slightly adjusted depending on the building’s shape and intended use, with a row spacing of 1.50m. The clear distance between the inner row of uprights and the wall is 0.40m, and the clear distance between the outer row of uprights and the wall is 1.90m. Double uprights are used in the lower section of the scaffold, and single uprights in the upper section. Adjacent upright joints should be staggered by 2-3m and must be connected using straight couplers. Cross couplers are not allowed on horizontal members, nor are pivot couplers used for overlapping. Uprights must be vertical, with an allowable deviation of 1/200 of the upright height. The line connecting the inner and outer rows of uprights must be perpendicular to the wall. When the scaffolding reaches the top floor of the building, the inner row of uprights should be 40-50cm lower than the building’s eaves, and the outer row of uprights should be 1-1.5m higher than the building’s eaves. Two guardrails should be erected, and dense safety netting should be hung.
2. Erection of Main Horizontal Members of Scaffolding: A baseboard must be installed in both the longitudinal and transverse directions of the scaffolding. The step spacing of the main horizontal members in this project is 1.5m, which is sufficient for floor operations but should not exceed 1.5m. Main horizontal members must be horizontally connected using single-pole clamps; pivot clamps are not permitted. Inner row joints and upper/lower step joints within the same row must be staggered by one vertical member spacing. Cross clamps should be used at the edge joints between main horizontal members and uprights.
3. Erection of Secondary Horizontal Members of Scaffolding: The spacing of secondary horizontal members should be approximately 1.50m, similar to the upright spacing. The end closest to the wall should be 30cm from the structural wall, and the outer end should extend 5cm beyond the vertical member. When using planks for secondary horizontal members, the spacing should not exceed 1.5m; when not using planks, the spacing should not exceed 3.0m. Secondary horizontal members and uprights should be secured with cross clamps; pivot clamps are not permitted. Secondary horizontal members should rest on top of main horizontal members and should not be suspended below them.
4. Scaffolding Planks: This project uses 5cm thick wooden scaffolding planks, made of pine or fir wood, 4m long, 20-25cm wide, and each plank weighing no more than 30kg. The working level scaffolding planks must be fully, tightly, and stably laid, with no protruding or flying planks. Scaffolding plank joints must be flush, and double horizontal bars must be installed at the joints. Φ12 or Φ14 steel bars are used to horizontally press down on the scaffolding planks and are secured to the horizontal bars with #8 wire. The spacing of the steel bars pressing down on the scaffolding planks is 2.0m, and there must be no fewer than 3 steel bars on each scaffolding plank. Toe boards must be installed on the outer side of the working level scaffolding, with a height of no less than 18cm.
5. Scaffolding Protection: Guardrails are installed between the upper and lower horizontal bars on the outer side of the working surface, at a height of 1/2 step distance, and are installed according to the working surface. During construction, they are installed on the outer row of vertical bars. Where railings and vertical bars intersect, they should be secured with cross-shaped clips; the connection method for single-line clips is the same as for the main horizontal bars. Small-mesh safety netting should be completely sealed from bottom to top and tightly bound to the main horizontal bars at the same level as the scaffold boards to prevent people from falling through. During construction, the small-mesh netting is sealed onto the outer scaffolding.
6. Safety Protection Measures for Scaffolding: Scaffolding steel pipes: The scaffolding pipes should be straight, with an outer diameter of 48-51 mm and a wall thickness of 3-3.5 mm. The most commonly used lengths are 6 meters, 3 meters, and 2 meters, followed by 4 meters. Before the steel pipes arrive on site, the manufacturer’s business license and qualification certificate should be checked. A quality assurance certificate (conformity certificate) must be provided upon arrival, and the appearance quality must be inspected. Pipes with insufficient wall thickness, severe rust, bending, flattening, or cracks are prohibited from use.
Scaffolding couplers: These must be malleable iron couplers manufactured by a unit approved by the labor department. They must be free of defects, have flexible connections and rotations, and have a factory certificate of conformity. Their appearance quality must be inspected; couplers with brittleness, deformation, stripped threads, or detached shafts are prohibited from use. Scaffold planks: Made of pine or fir, 2-6 meters long, 5 cm thick, and 23-25 cm wide, they should be secured with wire after purchase. Scaffold planks with rotten, cracked, loose joints, severe misalignment, or deformation are prohibited from use.
Scaffolding safety nets: The width must be no less than 3 meters, the length no more than 6 meters, and the mesh size no larger than 10 cm. Safety nets must be woven from materials such as vinylon, nylon, and other materials that meet national standards. Damaged or rotten safety nets are strictly prohibited. Polypropylene small-mesh nets are only permitted for use as vertical nets.
Second, Scaffolding dismantling.
The dismantling procedure should proceed step-by-step from top to bottom. First, dismantle the protective safety net, scaffold planks, and timber scaffolding, then dismantle the upper couplers and connecting rods of the cross-shaped cover in sequence. Before removing the next scissor bracing, temporary diagonal supports must be secured to prevent the scaffolding from tilting. Pushing or pulling methods are prohibited during dismantling. When dismantling or lowering poles, coordinated operation is essential. Steel pipes that have been removed must be passed down one by one, never dropped from a height. To prevent damage or accidents, removed fasteners must be collected in tool bags, filled to the brim, and hoisted down smoothly, never dropped from above. During scaffold dismantling, a dedicated person must be stationed around the work area and at entrances and exits. Workers are strictly prohibited from entering the danger zone. Temporary fencing should be added during scaffold dismantling. If electrical wires or equipment obstruct the work area, prior contact should be made with relevant authorities for removal, relocation, or protection.
Third, Safe Operation Regulations for Scaffolding.
Workers engaged in scaffolding erection must be trained, pass an assessment, and hold a special operation certificate. Non-scaffolders are not allowed to work alone without permission.
Scaffolders must undergo a medical examination. Those suffering from high blood pressure, heart disease, epilepsy, dizziness, poor eyesight, or unsuitability for high-altitude work are prohibited from engaging in high-altitude scaffolding operations. Before erecting scaffolding, obstacles should be cleared, the site leveled, the foundation soil compacted, and drainage ensured.
Work on scaffolding is prohibited until it has passed inspection.
High-altitude work must be suspended in strong winds of level six or above, heavy rain, heavy snow, or dense fog.
If any unsafe situation arises during work, work must be stopped immediately, the danger zone evacuated, and the situation reported to the supervisor for resolution. Risky work is strictly prohibited.
Post time: Apr-01-2026