First, pole basic setting specifications
1. The foundation should be flat and compacted, and the surface should be hardened with concrete. Floor-standing poles should be placed vertically and firmly on a metal base or solid floor.
2. The lower part of the vertical pole should be equipped with vertical and horizontal sweeping poles. The vertical sweeping rod should be fixed on the vertical pole no more than 200mm away from the base with right-angle fasteners, and the horizontal sweeping rod should be fixed on the vertical pole immediately below the longitudinal sweeping rod using right-angled fasteners. When the foundations of the vertical poles are not at the same height, the vertical sweeping pole at the high place must be extended by two spans to the lower place and fixed to the vertical pole. The height difference should not be greater than 1m. The distance from the axis of the pole above the slope to the slope should not be less than 500mm.
3. A drainage ditch with a cross-section of no less than 200×200mm should be set outside the vertical pole foundation to keep the vertical pole foundation from water accumulation, and concrete should be hardened within a wide range of 800mm outside.
4. External scaffolding should not be installed on roofs, awnings, balconies, etc. If necessary, the structural safety of roofs, awnings, balconies, and other parts should be checked separately and specified in the special construction plan.
5. When there are equipment foundations and pipe trenches under the scaffolding foundation, they should not be excavated during the use of the scaffolding. When excavation is necessary, reinforcement measures should be taken.
Second, pole erection specifications
1. The height of the bottom step of the steel pipe scaffolding shall not be greater than 2m, and the height of the other steps shall not be greater than 1.8m. The vertical distance of the vertical poles shall not be greater than 1.8m, and the horizontal distance shall not be greater than 1.5m. The horizontal distance should be 0.85m or 1.05m.
2. If the erection height exceeds 25m, double poles or narrow spacing must be used. The height of the secondary pole in the double poles should not be less than 3 steps and not less than 6m.
3. The bottom step pole must be equipped with vertical and horizontal sweeping poles. The vertical sweeping pole should be fixed on the vertical pole with a right-angle fastener no more than 200mm away from the base epithelium. The horizontal sweeping pole should also be fixed on the vertical sweeping pole below the longitudinal sweeping pole with a right-angle fastener. on the pole.
4. The bottom row of vertical poles, sweeping poles, and scissor supports are all painted yellow and black or red and white.
Third, rod setting specifications
1. A transverse horizontal pole should be set at the intersection of the scaffolding pole and the longitudinal horizontal pole, and both ends should be fixed on the pole to ensure safe stress.
2. Except for the overlap joint on the top step of the top floor, the length of the vertical pole must be the butt joint on each step of the other floors. When overlapping, the overlapping length should not be less than 1m, and should be fastened with no less than three rotating fasteners.
3. During the use of the scaffold, it is strictly prohibited to dismantle the vertical and horizontal horizontal rods at the main nodes.
4. The longitudinal horizontal pole should be set inside the vertical pole, and its length should not be less than 3 spans.
5. The length of the longitudinal horizontal rods should be connected with butt fasteners, or overlapped joints can be used. When butt fasteners are used for connection, the butt fasteners of longitudinal horizontal bars should be arranged in a staggered manner. When overlapping is used, the length of the overlap of the longitudinal horizontal bars should not be less than 1m, and three rotating fasteners should be set at equal intervals for fixation. The distance from the edge of the end fastener cover to the end of the overlapping longitudinal horizontal bar should not be less than 100mm.
6. The length of the edge of the fastener cover extending out of each end of the horizontal rod should not be less than 100mm and should be kept as consistent as possible.
7. The overlap and docking of adjacent rods must be staggered by one gear, and the joints on the same plane must not exceed 50%.
Fourth, setting specifications for scissor braces and transverse diagonal braces
1. The scissor brace should be set continuously from the bottom corner to the top along the length and height directions;
2. The scissor brace diagonal pole should be connected to the extended end of the vertical pole or transverse horizontal pole. The length of the diagonal poles should be overlapped, with an inclination angle of 45o to 60o (45o is preferred). The number of vertical poles spanned by each scissor brace should be 5 to 7, and the width should not be less than 4 spans and should not be less than 6m.
3. Horizontal diagonal braces should be set at both ends of the straight-shaped and open double-row scaffolding; a transverse diagonal brace should be set up every 6 spans in the middle.
4. Scissor braces and transverse diagonal braces should be erected simultaneously with vertical poles, longitudinal and transverse horizontal poles, etc.
5. The scissor brace should be overlapped, with an overlap length not less than 1m, and fastened with no less than three rotating fasteners.
Fifth, specifications for scaffolding pieces and protective railings
1. The outer scaffolding pieces should be fully paved at every step.
2. The scaffolding pieces should be laid vertically and horizontally on the wall. The scaffolding pieces should be fully laid out in place without leaving any gaps.
3. The scaffold piece should be tied firmly with double strands of 18# lead wire connected in parallel at the four corners, with a smooth junction and no probe board. When the scaffold piece is damaged, it should be replaced in time.
4. The outside of the scaffolding should be closed with a qualified dense-mesh safety net. The safety net should be fixed on the inside of the outer pole of the scaffold using 18# lead wire.
5. A 180mm toe-stop (pole) is installed at each step on the outside of the scaffolding, and a protective railing of the same material is installed at a height of 0.6m and 1.2m. If there is an edge on the inside of the scaffolding, the protection practices on the outside of the scaffolding should be followed.
6. The outer vertical poles of flat roof scaffolding should be 1.2m higher than the cornice epithelium. The external vertical poles of scaffolding on sloped roofs should be 1.5m higher than the cornice epithelium.
Sixth, specifications for a tie between the frame and the building
1. The connecting wall parts should be installed close to the main node, and the distance from the main node should not be greater than 300mm. When it is greater than 300mm, strengthening measures should be taken. When the connecting wall parts are located near 1/2 of the step distance of the vertical pole, they must be adjusted.
2. The connecting wall parts should be installed starting from the first longitudinal horizontal pole on the bottom floor. When there are difficulties in setting up here, other reliable fixing measures should be used. The wall-connecting parts should be arranged in a diamond shape, but they can also be arranged in a square or rectangular shape.
3. The connecting wall parts should be connected to the building using rigid connecting wall parts.
4. The connecting wall rods should be set horizontally. When they cannot be set horizontally, the end connected to the scaffolding should be connected diagonally downward and should not be connected diagonally upward.
5. The spacing between connecting wall parts should comply with the requirements of the special construction plan. The horizontal direction should not be larger than 3 spans, the vertical direction should not be larger than 3 steps, and should not be larger than 4 meters (when the height of the frame is above 50m, it should not be larger than 2 steps). The connecting wall parts should be encrypted within 1m of the corner of the building and 800mm of the top.
6. Wall-connecting parts must be installed at both ends of the straight-shaped and open-shaped scaffolding. The vertical spacing between the wall-connecting parts should not be greater than the floor height of the building, and should not be greater than 4m or 2 steps;
7. Scaffolding should be erected by the construction progress, and the height of one erection should not exceed two steps above the adjacent wall parts.
8. During the period of use of the scaffolding, it is strictly prohibited to dismantle the wall-connecting parts. The connecting wall parts must be dismantled layer by layer along with the scaffolding. It is strictly prohibited to dismantle the entire layer or several layers of the connecting wall parts before dismantling the scaffolding. The height difference between the segmented demolition should not be greater than two steps. If the height difference is greater than two steps, additional connecting wall parts should be added. Reinforcement.
9. When the original connecting wall parts need to be dismantled due to construction needs, reliable and effective temporary tie measures should be taken to ensure the safety and reliability of the outer frame.
10. When the height of the frame exceeds 40m and there is a wind vortex effect, wall-connecting measures should be taken to resist the upturn effect.
Seventh, the internal sealing specifications of the frame
1. The clear distance between the vertical poles in the scaffolding and the wall should generally not be greater than 200mm. When the requirements cannot be met, standing sheets should be laid. The standing pieces should be set flat and firm.
2. The scaffolding should be horizontally closed and isolated from the building every 3 steps at the construction level and below. Horizontal closed isolation should be set up on the first and top floors.
Eighth, specifications for external scaffolding ramps
1. The ramp is attached to the outside of the scaffolding and must not be overhanging. The ramp should be set up in a back-and-forth folding shape, the slope should not be greater than 1:3, the width should not be less than 1m, and the platform area at the corner should not be less than 3m2. The vertical poles of the ramp should be set up separately, and scaffolding poles should not be borrowed. Connections should be provided at every other step or vertical distance in the vertical and horizontal directions.
2. 180mm toe blocks (poles) should be installed on both sides of the ramp and around the corner platform, and a protective railing of the same material should be installed at a height of 0.6m and 1.2m, and closed with a qualified dense-mesh safety net.
3. Scissor supports should be installed on the sides of the ramp and outside of the platform.
4. The ramp scaffolding should be laid horizontally, and anti-slip strips should be installed every 300mm. The anti-slip strips should be made of 20×40mm square wood and tied firmly with multiple lead wires.
9. Specifications for setting up door openings
1. The scaffolding door opening should adopt the structure of rising diagonal rods and parallel chord trusses. The inclination angle between the diagonal rods and the ground should be between 45o and 60o;
2. The figure-eight support pole should be a full-length pole;
3. The figure-eight brace should be fixed on the extending end of the small crossbar or the small crossbar between spans by using rotating fasteners;
4. The vertical poles on both sides under the truss of the door opening should be double vertical poles, and the height of the auxiliary poles should be 1 to 2 steps higher than the door opening;
5. The ends of the rods extending out of the upper and lower chords in the door opening truss should be equipped with an anti-slip fastener. Anti-slip fasteners should be close to the fasteners at the main nodes.
Post time: Oct-30-2023