DRS double-rib beam type prefabricated stair

Abstract

A DRS double-rib beam type prefabricated stair comprises two stair section beams, folded plate type steps and a rest platform, and the folded plate type steps form cantilever ends on the outer sides of the two stair section beams respectively. The folded plate type step comprises a prefabricated concrete stair plate and a folded plate type connecting piece, the stair section beam is connected with the folded angle end of the folded plate type connecting piece, and a clearance is formed between the stair section beam and the folded plate type step. According to the beam type prefabricated stair, the bending moment of the plate is very small, and main stress is applied to the two ribbed beams; the weight of the whole prefabricated structure is further reduced through a connecting piece; meanwhile, the prefabrication process is simpler and more convenient.

Description

technical field [0001] The invention relates to the technical field of building industrialization and prefabricated buildings, in particular to a DRS (Double Ribbed-beam Stair) double ribbed beam type prefabricated staircase. Background technique [0002] Prefabricated buildings are more and more widely used in our country. Prefabricated stairs are a very important type of prefabricated components in building industrial parts, and they are also one of the earliest and most widely used components in prefabricated buildings. The common prefabricated slab stairs that are most commonly used at this stage are fully prefabricated only at the stair section, but the stair rest platform slab, ladder beams, and beam lugs supporting the prefabricated slab stairs still need to be cast-in-situ; the cast-in-place beam lugs need to be prefabricated Inserting the ribs, the slab-type prefabricated stairs need to be accurately aligned when hoisting, which has high technical requirements for c...

AI Technical Summary

Problems solved by technology

The common prefabricated slab stairs that are most commonly used at this stage are fully prefabricated only at the stair section, but the stair rest platform slab, ladder beams, and beam lugs supporting the prefabricated slab stairs still need to be cast-in-situ; the cast-in-place beam lugs need to be prefabricated Inserting the ribs, the slab-type prefabricated stairs need to be accurately aligned when hoisting, which has high technical requirements for construction and is somewhat difficult; due to the requirements of the shelving width and structural connection of the slab-type prefabricated stairs, the cast-in-place ladder beam needs to be set back from the edge of the first step Allow at least 400mm, which makes it relatively difficult to arrange the ladder beams, and the unsightly appearance of the ladder beams and the ears often appear directly above the door; the weight of ordinary slab prefabricated stairs is relatively large, and only the ladder section (excluding 2 rest platforms) The weight has already reached about 2 tons; the step board of ordinary slab-type prefabricated stairs is generally 120-130mm thick, and the 400-wide shelving length is 180mm thick. The amount of concrete and steel is relatively large, and the cost is relatively high.

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