Convenient-hoisting type precast stair

Abstract

The invention discloses a convenient-hoisting type precast stair. The convenient-hoisting type precast stair comprises a stair body in which a reinforcement framework is arranged, wherein stair platforms are arranged at two ends of the stair body, and steps of which the rear surfaces are provided with ladder layers having the same shape between the two stair platforms; the distance from the stepsto the ladder layers in the horizontal direction is equal to the width of half step; supporting frames are arranged at two ends of the ladder layers; longitudinal circular grooves are formed in upperand lower connecting parts of the ladder layers; hoisting holes which communicate with the grooves are formed in the middle parts of the steps; vertical prepared holes are formed below the stair platforms. When the convenient-hoisting type precast stair is used for hoisting, steel pipes are placed into the grooves and then hoisted through steel cables from the hoisting holes; the whole hoisting process is convenient, quick, safe and reliable; few materials are used in the ladder layers, so that the cost of the stair is decreased.

Description

technical field [0001] The invention belongs to the field of assembled monolithic buildings, and in particular relates to a prefabricated staircase which is convenient for hoisting. Background technique [0002] In recent years, the country has vigorously developed steel structures and prefabricated buildings. Among them, stairs are an essential part of the building. The stairs are prefabricated in the factory with tooth plates and formwork, and installed directly after arriving at the construction site without support. The formwork does not require watering and maintenance, which saves water resources and maintenance time, and greatly shortens the construction period. [0003] The existing prefabricated and assembled beam-supported reinforced concrete stairs have a slope at the bottom of the stairs and steps at the top of the stairs. During the assembly process, the stairs need to be hoisted. There are generally two types of hoisting holes: 1. Set four steps on the steps. ...

AI Technical Summary

Problems solved by technology

[0003] The existing prefabricated and assembled beam-supported reinforced concrete stairs have a slope at the bottom of the stairs and steps at the top of the stairs. During the assembly process, the stairs need to be hoisted. There are generally two types of hoisting holes: 1. Set four steps on the steps. Hanging rings, the four rings are arranged in a rectangular shape. When hoisting, one ring is too stressed and will be out of the fixed position, which is dangerous; 2. There are several longitudinal through holes under the steps, through which steel pipes are inserted, and the steel pipes are hung from both ends of the stairs. , but at the construction site, it is not suitable for prefabricated stairs with walls between the steps, and needs to be improved

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