1. Material selection: Use bamboo that has been growing for more than four years, which is green, tender, withered, insect infested, rotten, and has cracks (more than two sections), and cannot be used..
Ringlock Scaffolding Ledger End
2. Binding: Use scallions, bamboo strips, and wide strips. It is not allowed to tie three at a time..
3. Bamboo diameter: The effective diameter of the small head of the upright pole, large crossbar, scissor brace, throwing brace, and top brace should be ≥ 7cm. Cross arm (small crossbar) ≥ 9cm..
4. If the height of the frame is within 24m, and above 24m, a design plan and approval should be prepared..
The uniform load on masonry scaffolding shall not exceed 270kg/m2, and the uniform load on decorative scaffolding shall not exceed 200kg/m2..
1. Layout: The foundation within the scope of scaffolding installation should be leveled and compacted..
Based on the instructions of the construction workers and the characteristics of the building, determine the vertical and horizontal spacing of the poles, draw lines on site, and set out with bamboo sticks..
⑵ Determine the step distance of the scaffolding (should be ≤ 1.8) and the height of the first skin scaffolding based on the overall height and characteristics of the building and construction requirements..
2. Buried at a depth of 30-50cm, with anvil stones placed underneath. When the soil is soft or excavation is difficult, a sweeping pole should be tied..
3. Horizontal spacing: 1-1.2m, and the distance between the vertical pole and the wall is ≤ 20cm..
4. Longitudinal spacing: 1.3-1.5m (with an error of 5cm). The spacing between upright poles exceeding 15m in height shall not exceed 1.5m. The external pole should be 1.2-1.5m higher than the roof..
5. Verticality: ≤ 10cm at the corner and ≤ 15cm in the middle of the frame..
6. Overlap length of upright poles: not less than 1.8m, and the joint should cross a frame. Adjacent upright poles in the same frame should be staggered from each other and not overlap with the top support..
7. The lap joint of the upright pole should be placed on the right side of the top support, alternating to maintain the verticality of the top support in the middle..
The inner end extends 15-35cm from the inner pole, 5-10cm from the wall, and the outer end extends more than 20cm from the outer pole..
The top support should be vertical, with the big end facing upwards, and tied with three bamboo strips on the upright pole, and the diameter of the small end should be greater than two-thirds of the diameter of the small upright pole. The upper and lower top supports should be kept in the same straight line..
Set up four (with a frame width of less than 1.2m) and tie them to the inner side of the upright pole. Place the joints at the upright pole (on the small crossbar) and tie them firmly. The joints of the upper and lower frames should be staggered, and the overlap length should not be less than 1.5m. The number of binding passes should not be less than four..
At the corners, both ends, and in the middle of the scaffold, it is installed continuously from bottom to top every 15m of double spans. Scissor braces should be slightly tied at the head, with the larger end pressing the smaller end. The overlap length should be greater than 1.5cm, and the binding should be no less than 5 times, forming a 45 ° to 30 ° angle with the ground. The bottom should be buried at least 30cm above the top and middle. When it cannot be buried underground, a lead wire of no less than 16 # should be firmly tied at the intersection of the upright poles..
Vertical continuous multi span diagonal braces can also be set as needed, but their maximum width should not exceed 6 spans..
A throw brace should be installed every 6-7 upright poles on a scaffold below three steps, buried 30cm underground. Set up a connecting wall point every two steps and four spans for a three-step or more scaffold. The commonly used method is to embed 10-12 # galvanized lead wire double strands (or steel reinforcement rings) inside the wall to pull the inner upright pole of the frame, and at the same time, use a short piece of wood to support the wall surface.
