Used in factories and warehouses, etc. In public buildings, it is often used as a fire evacuation staircase. The load-bearing members of steel stairs can be made of steel, and the joints of each member are generally bolted or welded. The surface of the component is rust-proof with paint. Steps and platform plates should be embossed with embossed or sheet steel. In order to reduce the noise and consider the finish effect, an elastic surface layer or a surface layer such as concrete or stone can be laid on the steel pedal; or a reinforced concrete or stone step can be laid directly on the steel beam, which is called a combined staircase.
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