Newcomers to engineering cost, come and learn how to calculate scaffolding!
First, the calculation method of scaffolding
Erection size: the vertical distance of the vertical pole is 1.20 meters, the horizontal distance is 1.05 meters, and the step distance is 1.20 meters.
Steel pipe type: 48×3.5 steel pipe is used.
Wall connection: 2 steps and 2 spans are used, the vertical spacing is 2.4 meters, and the horizontal spacing is 2.4 meters.
Construction load: The uniformly distributed load is 3kN/m², 2 layers are constructed, and 4 layers of scaffolding boards are laid.
Cantilever horizontal steel beam: [16b channel steel is used, the length of the outer cantilever section is 1.5 meters, and the length of the anchor section is 2.5 meters.
Support rod and tie rod: The outermost support point is 2 meters away from the building. The support rod uses a 100.0×10.0mm steel pipe, and the tie rod also uses a 100.0×10.0mm steel pipe.
Second, the calculation of the large crossbar
Calculation method: Calculate the strength and deflection according to the three-span continuous beam.
Load calculation: The uniformly distributed load includes the standard value of the large crossbar’s deadweight P1=0.038kN/m, the standard value of the scaffolding load P2=0.15×1.05/3-0.053kN/m, and the standard value of the live load Q=3×1.05/3=1.05kN/m.
Static load calculation value: q1=1.2×0.038+1.2×0.053-0.109kN/m, live load calculation value: q2=1.4×1.05=1.47kN/m.
Maximum deflection: V=(0.677×0.091+0.990×1.05)×12004(100×2.06×105×121900)-0.909mm, the maximum deflection is less than 1200/150 and 10mm, which meets the requirements.
Third, the calculation of a small crossbar
Calculation method: strength and deflection calculation according to simply supported beam.
Load calculation: the standard value of large crossbar deadweight P1=0.038×1.20=0.046kN, the standard value of scaffolding board load P2=0.15×1.05×1.20/3-0.063kN, the standard value of live load Q=3×1.05×1.20/3=1.26kN.
Maximum bending moment: M=(1.2×0.038)×1.052/8+1.895×1.05/3-0.67kN.m=131.89N/mm², less than 205.0N/mm², meeting the requirements.
Maximum deflection: V=V1+V2=2.264mm, less than 1050/150 and 10mm, meeting the requirements.
Post time: Jan-14-2025