Step hanging reinforced component type stair assembly design structure and mounting method thereof

The invention provides a step hanging reinforced component type stair assembly design structure. The structure comprises a stair keel, step mounting frames and a hanging reinforcement part, wherein the stair keel is fixedly mounted on a wall, the plurality of step mounting frames are fixedly mounted on the stair keel in a stepped mode, the hanging reinforcement part is fixedly mounted below transverse plates of the step mounting frames, the hanging reinforcement part comprises three mounting plates which are arranged in parallel, every two adjacent mounting plates are connected through a connecting plate, the three mounting plates are fixedly mounted below the three adjacent transverse plates respectively, and the connecting plates are hung on the top face of a building through hanging rods. The invention further provides a mounting method of the step hanging reinforced component type stair assembly design structure. Compared with the prior art, the advantages that additional support can be provided for stair