Prefabricated stair

Abstract

The invention discloses a prefabricated stair which comprises prefabricated stair plates, variable-section stair beams, stair beam top building surface layers, stair beam bottom overhang lugs and stair beam top overhang lugs. The prefabricated stair plates are factory prefabricated parts, one end surfaces of the variable-section stair beams are arranged at one ends of the stair beam top building surface layers and further provided with the stair beam top overhang lugs, the other end surfaces of the variable-section stair beams are provided with the beam bottom overhang lugs, and the variable-section stair beams, the stair beam top building surface layers, the stair beam bottom overhang lugs and the stair beam top overhang lugs are cast on site to form cast-in-situ parts; the cast-in-situ parts are arranged at the upper ends and the lower ends of the prefabricated stair plates, the upper ends of the prefabricated stair plates are fixedly connected to the stair beam bottom overhang lugs,the lower ends of the prefabricated stair plates are slidably supported on the stair beam top overhang lugs, and the last steps of the prefabricated stair are formed by the height difference betweenthe variable-section stair beams, the stair beam top building surface layers and the top surfaces of the upper end parts of the prefabricated stair plates. the span of the prefabricated stair plates is reduced, and overweight of a single prefabricated stair plate is avoided.

Description

technical field [0001] The invention belongs to the technical field of prefabricated buildings, in particular to a prefabricated staircase, which belongs to the innovative technology of the prefabricated staircase. Background technique [0002] Prefabricated stairs have been widely used in the field of prefabricated buildings because of their high degree of standardization, low production difficulty, and convenient construction and installation. However, the prefabricated stairs used in engineering practice generally have a flat section at the upper and lower ends of the prefabricated stairway, which is longer than the width of the step surface. The long slab section further increases the calculated span of the prefabricated riser, resulting in an increase in the calculated thickness of the prefabricated riser, which in turn causes an increase in the material consumption of the prefabricated riser, the weight of the component increases, and the manufacturing and transportati...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a prefabricated staircase, which can reduce the span of the prefabricated stair and solve the problem caused by the overweight of the prefabricated stair with the flat section

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