(1) Scaffolding must be erected according to the construction progress. The installation height should not exceed two steps above the adjacent wall.
(2) After each scaffold erection, it shall meet the following scaffold technical requirements. Allowable deviation requirement
1) Basic technical requirements: The scaffolding part of this project falls on the basement roof and outdoor backfill, and the bearing capacity of the roof and foundation will be accepted after winning the bid.
2) The allowable horizontal deviation of the verticality of the stud is 25mm.
3) Spacing: the step distance is 20mm, the longitudinal direction is 50mm, and the transverse direction is 20mm. ..
4) The height difference of longitudinal horizontal bars, the two ends of one bar are 20mm, and the height difference of two longitudinal horizontal bars in the same span is 10 mm. ..
5) The distance between the center points of each fastener at the main node is ≤150 mm..
6) The elevation difference between two butt fasteners on the synchronous column is ≥500mm or higher.
7) The distance from the butt fastener on the vertical pole to the main node is ≤ 1/3? h；
8) The distance between the butt fastener on the longitudinal horizontal bar and the main node is ≤La/39) The tightening torque of the fastener bolt is 40 ~ 65N? M, the inclined angle between the diagonal brace and the ground is 45 ~ 60.
According to the above regulations, correct the step distance, longitudinal distance, transverse distance and verticality of the vertical pole.
(3) Erection requirements of poling
1) It is forbidden to mix steel pipes with an outer diameter of 48mm and 5 1mm to erect poles;
2) Butt fasteners of adjacent uprights shall not be within the same height;
3) Butt fasteners on columns should be staggered. Staggered distance: the joints of two adjacent vertical poles should not be set in synchronization, and the staggered distance of two spaced joints of one vertical pole in synchronization should not be less than 500mm in the height direction. The distance from the center of each joint to the main node should not be greater than 1/3 step;
4) The top of the vertical pole should be higher than the roof parapet 1m,1.5m; Above cornice epithelium;
5) In addition to the top step, the extension of the vertical pole can be overlapped, and the joints of other layers and steps must be connected by butt fasteners.
(4) Settings of wall parts:
1) When a node with wall-connected parts is erected, the wall-connected parts shall be set immediately after the erection of vertical poles, longitudinal horizontal poles and transverse horizontal poles.
2) Maximum spacing of wall fittings. On-site measures should be taken to strengthen Rachel according to the actual floor height and bay, and the coverage area of each wall pole should be controlled at ≤27m2).
3) Layout of wall parts. Should be set close to the main node, the distance from the main node should not be greater than 300mm, and should be set from the first step of the bottom longitudinal horizontal bar. When it is difficult to set this place, other reliable measures should be taken to fix it.
4) When the scaffold construction operation floor is two steps higher than the wall piece, temporary stability measures should be taken until the upper layer of wall piece is erected, which can be removed according to the situation.
(5) Erection of longitudinal and transverse horizontal bars:
1) The longitudinal horizontal pole should be set inside the vertical pole, and the length should not be less than 3 spans; The extensions shall be connected by butt fasteners or lap joints. When docking, the fasteners should be staggered, and the joints of two adjacent longitudinal horizontal bars should not be set in synchronization or within the same span. The horizontal stagger distance between two adjacent joints with unsynchronized or different spans should not be less than 500mm, the distance from the center of each joint to the nearest main node should not be greater than 1/3 of the longitudinal distance, and the overlapping length should not be less than 1m when overlapping, and it should be fixed with three equally spaced rotating fasteners. The distance from the edge of the cover plate of the end fastener to the rod end of the overlapping longitudinal horizontal rod should not be less than100 mm.
2) Horizontal bar: A horizontal bar must be set at the main node, fastened with right-angle fasteners, and cannot be removed. The center distance between the two right-angle fasteners at the main node should not be greater than150 mm. In double-row scaffolding, the overhanging length of one end against the wall should not be greater than 0.4L and 500 mm.. When using bamboo basketry scaffold board, both ends of the horizontal pole of double-row scaffold should be fixed on the vertical pole with right-angle fasteners.
(6) Erection of vertical and horizontal sweeping poles:
1) Scaffolding must be provided with vertical and horizontal sweeping poles. Longitudinal rod sweeps the floor with right-angle fasteners fixed on the vertical rod which is not more than 200mm away from the basic epithelium, and transverse rod sweeps the floor with right-angle fasteners fixed on the vertical rod near the bottom of longitudinal rod sweeps the floor.
2) When the vertical pole foundation is not at the same height, the high vertical sweeping pole must extend to the lower part for two spans and be fixed with the vertical pole, and the height difference should not be greater than1m.. The distance from the vertical pole axis near the top of the slope to the slope surface should not be less than 500mm.
(7) The erection of bracing and transverse bracing:
Double-row scaffolding shall be provided with bracing and transverse bracing, and the number of each bracing passing through the vertical pole shall be ≤7 at 45, ≤6 at 50 and ≤5 at 60; Double-row scaffolding with a height less than 24m must be provided with bracing at both ends of the facade, and it should be set continuously from bottom to top; The clear distance between intermediate bracing should not be greater than 15m. The extension of diagonal braces in this project adopts lap joint, the lap joint length is not less than 1m, and it is fixed with not less than 3 rotating fasteners. The distance from the edge of the end fastener cover plate to the rod end should not be less than 100mm, and it should be erected synchronously with the vertical rod, longitudinal and transverse horizontal rod.
(8) Fasteners:
When fasteners are connected, the tightening torque of bolts should not be less than 40N? M, and should not be greater than 65N? m .
Fixed on the master node. Right-angle fasteners for horizontal and vertical horizontal rods, scissors, horizontal braces, etc. The mutual distance between the center points of rotating fasteners should not be greater than 150mm, and the openings of butt fasteners should be upward or inward. The length of each steel bar end protruding from the edge of fastener cover plate should not be less than100 mm.
(9) Railing baseboard pole:
The railings and baseboards of the operation floor should be located on the inner side of the vertical pole. The height of railing epithelium should be 1.2m, the height of foot rail (board) should not be less than 180mm, and the middle railing should be set in the middle.
(10) bamboo basket:
Bamboo basketry scaffold board should be spread all over, and the lower longitudinal horizontal bar should be fixed on the horizontal horizontal bar with right-angle fasteners. And should be equal spacing, spacing should not be greater than 400mm；; Bamboo basketry scaffolding should be laid along the direction of the main bamboo bars perpendicular to the longitudinal horizontal bars, and butt-jointed and tiled. The four corners are fixed on the longitudinal horizontal bar with galvanized steel wire with the diameter of1.2 mm. ..
After the external wall scaffolding is erected and the flame retardant dense mesh safety net is hung, the "acceptance card" can be hung after the acceptance is qualified.
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