Common problems of scaffolding

Design

(1) There should be a clear understanding of heavy scaffolding. Generally, if the thickness of the floor is more than 300mm, it should be considered to be designed according to the heavy scaffolding. The scaffolding load exceeds 15kn/㎡, the design plan should organize experts to demonstrate. It is necessary to distinguish the length of the steel pipe length of those parts of the parts of the parts of the parts. It should be considered for the template bracket: the length of the center line support point of the top -level rod at the top of the top is not too long, generally less than 400mm (in the new specifications (in the new specification It may be revised). When the rod is calculated, the upper step is generally the largest and the bottom step is the largest. It should be used as the main calculation point. When the bearing capacity is dissatisfied with the requirements, the vertical and horizontal spacing should be increased, or the horizontal rod should be reduced.

(2) Domestic scaffolding generally exists in the quality of steel pipes, fasteners, top brackets, and bottom brackets. The theoretical calculations in actual construction do not consider these. It is best to take a certain safety factor during the design calculation process.

Construction

The lack of sweeping rods, uninterrupted connecting at the vertical and horizontal junction, too large or too small the distance between the floor -to -ground distance; the cracking of the score, the thickness of the thickness, and the overlap have no specifications; Falling nets; scissors are not continuous in the plane; the opening scaffolding is not set up; the small crossbars under the scooter are too large; the wall parts are not connected to the internal and external rigidity; Deducting and slipping.

Deformation accident

(1) Local deformation of the scaffolding caused by the sedimentation of the foundation. Set up eight -character or scissors on the horizontal cross section of the double -row, and set up a set of rods until the row of the deformation area. Eight -character or scissors must be located on a solid and reliable foundation.

(2) Suspensable steel beams that depend on the root of the scaffolding deformation exceed the specified value. The anchoring point of the suspended steel beam is reinforced. The steel beam is supported by the steel beam and the U -shaped support is tightened and the roof is held. There is a gap between the embedded reinforced ring and the steel beam, and the horse wedge must be tightened. The wire rope at the outer end of the steel beam is checked by the roots, which is tight to ensure uniformity.

(3) Local destruction of the scaffolding and pull system is damaged. It is necessary to immediately restore it in accordance with the original solution method formulated by the original solution and correct the deformable parts and rods. If you correct the deformation of the scaffolding outward, set a 5T inverted chain according to each opening, tighten the structure, loosen the rigid pull point, and tighten the downside inward at the same time. Connect, and tighten each loaded steel wire rope to make it uniform, and finally let go of the chain.