Fire-proof metal structural component

The utility model relates to a fire-proof structural component of construction steel structure. A water-flushed chamber is arranged on the structural component, and the chamber wall of the water-flushed chamber is jointly formed by jointing the structural components or chamber wall brattices, or the structural components and the chamber wall brattices. When fire hazard happens, the heat of the structural component is carried off by the water and the water vapor in the water-flushed chamber, so as to guarantee that the steel construction is unable to heat up, soften and collapse for long. The water-flushed chamber can be used as the circulation pipe of the water and the air, and the structural component and the chamber wall brattices can be used as cooling components for heat radiation or indoor and outdoor decorative boards. The utility model decreases the fire prevention expenses of the steel structure and reduces overlapping investment, and greatly enhances the price ratio of steel structure constructions and competitive power in the architecture industrialization.