Steel pipe shelf pipe is mainly used for construction pipe, construction site support, safety protection support.
Steel pipe shelf pipe consists of steel pipe fasteners and steel pipes. The combined use of the shelf pipe and the fasteners forms a fastener steel pipe scaffold. The shelf pipe is an important part of the fastener steel pipe scaffold. Generally, there are 91 scaffolding tubes per bundle.
Common problems in the use of steel pipe rack pipe:
(1) There should be a clear understanding of the load bearing capacity of steel pipe rack pipes. Generally, if the floor thickness exceeds 300mm, the design of heavy-duty pipe racks should be considered instead. Scaffold loads exceeding 15KN / mm2 should be organized for expert demonstration. It must be clear that the change in the length of the steel pipe in those parts has a greater impact on the load. For the template support, the upper free length a should not be too long, and it is generally less than 500mm (may be revised in the new code). Generally, the calculation of the vertical pole is the most The upper and lower steps are the most stressed and should be used as the main calculation points. When the bearing capacity is not enough, the pole should be increased to reduce the step.
(2) At present, the quality of steel pipe, fasteners, top brackets and bottom brackets is generally unqualified in steel pipe rack pipes in China. Theoretical calculations in actual construction currently do not take these into consideration. Sweeping poles are missing during construction, the junctions are not connected, the distance between the sweeping poles and the ground is too large or too small; the scaffold boards are arranged, the thickness is not enough, and the overlap does not meet the requirements of the specification; Anti-fall net; Scissors are not continuous in the plane; open scaffolds are not provided with diagonal braces; the distance between the small crossbars under the scaffolding board is too large; the wall parts do not achieve a rigid internal and external connection; the distance between protective railings is greater than 600mm; , Fastener slip, etc.
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