I would like to ask: for different requirements such as a fire resistance limit of over 2.5 hours or over 4 hours, are there any differences in the steel materials used?
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Tasks such as the fabrication and installation of the equipment’s steel structure as well as the application of fire-resistant coatings are involved. The beams and columns of the equipment’s steel structure are required to have a fire resistance rating of at least 2.5 hours, in compliance with the Code for Fire Protection Design of Buildings. Are there any differences in the steel materials used when the required fire resistance rating is 2.5 hours or more, or 4 hours or more?
Steel with a fire resistance rating of over 2.5 hours and over 4 hours generally does not differ significantly in terms of material properties; the main differences lie in the fire protection measures, such as the thickness of fireproof coatings, the type of fireproof covering materials used, and their thickness. The steel itself is mostly ordinary structural steel, and improving its fire resistance relies primarily on external fire protection measures. Different fire resistance ratings are achieved by increasing the thickness of fireproof coatings or other insulating materials to meet higher fire resistance requirements. .