A steel structure column corner support-free cantilever composite slab structure

CN224281714UActive Publication Date: 2026-05-26SINOSTEEL MAANSHAN INST OF MINING RES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SINOSTEEL MAANSHAN INST OF MINING RES CO LTD
Filing Date
2025-06-06
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In prefabricated steel structure buildings, it is difficult to implement steel column corner cantilever slabs, especially in the design of exterior curtain walls where steel column corners have no support points and it is difficult to set up temporary supports, which increases the construction difficulty. Moreover, existing technologies such as patent CN212773372U only solve the problem of steel beam cantilever slabs and lack versatility.

Method used

The system employs a steel plate bottom formwork, a steel frame, and a composite steel floor slab structure. The steel plate bottom formwork is connected to the steel columns by welding, and a stable support system is formed by combining cold-formed thin-walled C-shaped steel and channel steel pads. The steel frame and concrete are poured together to form a composite floor slab, which solves the construction problem of cantilevered slabs at the corners of steel columns.

Benefits of technology

It achieves stable cantilevered steel column corner slabs and simplifies construction, improves load-bearing capacity, and forms a safe and reliable composite floor structure that can meet the needs of various design schemes.

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Abstract

This utility model discloses a steel column corner support-free cantilever composite slab structure, belonging to the field of prefabricated building structure technology. This utility model includes a steel plate bottom formwork, a steel frame, and a steel composite floor slab. One end of the steel plate bottom formwork is welded to the steel column, and the other end forms the edge of the cantilever slab. The steel plate bottom formwork includes a patterned steel plate, short stiffening ribs, and wedge-shaped stiffening ribs, which are positioned below the patterned steel plate and welded to it to form the bottom formwork system. The steel frame includes cold-formed thin-walled C-shaped steel and channel steel blocks. The cold-formed thin-walled C-shaped steel is welded and fixed to the steel plate bottom formwork through the channel steel blocks. The steel composite floor slab is formed by casting the steel frame and concrete together. This utility model, through the design of the steel plate bottom formwork and the steel-concrete slab, allows for the direct installation of the steel frame at the corner of the steel column. After the concrete is poured, a composite floor slab is formed, thus completely solving the problem of the difficulty in implementing cantilever slabs in the blind area of ​​the steel column corner.
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