Scaffolding should be inspected at the following stages:
1.After foundation construction is completed and before the frame is erected.
2.After the first step of the frame is erected and the main horizontal members are installed for large and medium-sized scaffolding.
3.After every 6–8 meters of height is erected.
4.Before loads are applied to the working surface.
5.After reaching the design height (for structural construction, inspect once per floor).
6.After encountering Level 6 or stronger winds, heavy rainfall, or after thawing in frozen soil areas.
7.After being out of use for more than one month.
8.Before dismantling.
II. Ten Items for Scaffolding Inspection
① Foundation and base
② Drainage ditches
③ Base plates and supports
④ Kick plates
⑤ Main frame structure
⑥ Scaffold planks
⑦ Tie members
⑧ Diagonal bracing
⑨ Measures for upper and lower passage
⑩ Fall prevention measures for the frame
III. Detailed Rules for Scaffolding Inspection
1. Foundation and Base
Whether the foundation and base of the scaffolding are calculated according to relevant regulations based on the frame height and soil conditions of the erection site.
Whether the foundation and base of the scaffolding are compacted.
Whether the foundation and base of the scaffolding are level.
Whether there is water accumulation in the foundation and base of the scaffolding.
2. Drainage Ditches
Clear and level debris from the scaffolding site to ensure smooth drainage.
The distance between the drainage ditch and the outermost scaffold upright should be greater than 500 mm.
The width of the drainage ditch should be 200–350 mm, and the depth should be 150–300 mm.
A sump pit (600 mm × 600 mm × 1200 mm) should be installed at the end of the ditch to ensure timely drainage of accumulated water.
3. Base Plates and Supports
The inspection of scaffold base plates and supports is determined based on the frame height and load.
For scaffolding below 24 m, the base plate specifications should be (width greater than 200 mm, thickness greater than 50 mm, length not less than 2 spans), ensuring each upright is placed at the center of the base plate, with a base plate area of not less than 0.15 m².
The thickness of the base plate for load-bearing scaffolding above 24 m must be strictly calculated.
The scaffold support must be placed at the center of the base plate.
The width of the scaffold support should not be less than 100 mm, and the thickness should not be less than 5 mm.
4. Kick Plates
Kick plates must be connected to the uprights; direct connections between kick plates are strictly prohibited.
The horizontal height difference of kick plates should not exceed 1 m, and the distance from the slope edge should not be less than 0.5 m.
Longitudinal kick plates should be fixed to the uprights with right-angle couplers at a height not exceeding 200 mm above the support.
Transverse kick plates should be fixed to the uprights immediately below the longitudinal kick plates using right-angle couplers.
5. Main Frame Structure
The inspection of the main scaffold structure is calculated based on construction requirements. For example, for ordinary scaffolding, the upright spacing must be less than 2 m, longitudinal horizontal member spacing less than 1.8 m, and transverse horizontal member spacing less than 2 m; load-bearing scaffolding must be inspected according to calculation requirements.
The vertical deviation of uprights should comply with the data in Table 8.2.4 of the Technical Code for Safety of Steel Tubular Scaffolds with Couplers in Construction (JGJ130-2011).
When splicing scaffold uprights, except for the top layer and top step, all other layers and steps must use butt couplers for connections, and the joints should be staggered: adjacent upright joints must not be set in the same step or same span; the horizontal distance between adjacent joints in different steps or spans should not be less than 500 mm; the distance from the center of each joint to the nearest main node should not exceed 1/3 of the longitudinal spacing; the lap length should not be less than 1 m, fixed with three evenly spaced swivel couplers, and the distance from the edge of the end coupler cover plate to the end of the lapped longitudinal horizontal member should not be less than 100 mm. For double-row scaffolding, the height of the secondary upright should not be less than 3 steps, and the length of the steel tube should not be less than 6 m.
The small horizontal members of the scaffolding should be installed at the intersection of uprights and main horizontal members and must be connected to the uprights with right-angle couplers. For the working layer, additional small horizontal members should be added between two nodes to bear and transfer the load of the scaffold planks. Small horizontal members must be fixed to the longitudinal horizontal members with right-angle couplers.
During frame erection, couplers must be used appropriately; substitution or misuse is strictly prohibited. Cracked couplers are strictly prohibited in the frame.
Post time: 2025-10-24 14:21:15