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Anonymous users2024-01-24Not good. If the beam cross-sectional height is too small and the stiffness is insufficient, large deformations will occur.
The cantilever 2 meters mentioned by the subject, the balcony with a span of 4 meters, the cantilever beam with a cross-section of 250x500, the upper reinforcement adopts 5C20 3 2, the bottom reinforcement is 3C16, the stirrup is C8@100, and the waist reinforcement is 2C12, so the configuration is sufficient. Here's a simple calculation for you through the model, as shown in the figure below: >>>More
This should be determined by the specific plane layout and material grade through load calculation. In general, the cross-sectional size of the root of the pick beam of the net pick 1800 needs to be 200 500 or 250 450. The pick beam is a static cantilever beam, without many constraints, and there is no room for a slight mistake; Moreover, the lift beam is not only the bearing capacity and stability, but also the deflection and crack resistance.
upper part 3 - diameter 25 steel bars, protruding into the side wall beam or frame beam 2 meters; >>>More
Bottom gluten 20 gluten 32 stirrups encrypted.
Generally, one meter two cantilever beams are not very large, the upper part is equipped with 2 20 steel bars, the lower part is 2 14 steel bars, stirrups 8 @ 120, as for the other no special requirements, if for safety reasons can add duck tendons, the rest of the cantilever beam is the key to the rear anchorage, to fully ensure the quality of construction, there are new workers to ensure that the technical disclosure is in place.