1.2-1.5mm thick steel plate should be used for steel fire door frame, 0.8-1.2mm thick steel plate should be used for door leaf panel, and 1.2-1.5mm thick steel plate should be used for reinforcement. The steel fireproof door and door frame shall be filled with incombustible materials, and the melting temperature of door lock, hinge, bolt and other hardware accessories shall not be lower than 950 ℃.

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