Which material is commonly used for fire doors?

Fire doors are crucial components of a building's fire protection system, designed to resist the passage of fire and smoke between different compartments of a structure. Steel is commonly used for fire doors due to its inherent properties that enhance fire resistance. It has a high melting point, and when constructed with fire-resistant materials, a steel fire door can withstand intense heat for an extended period, effectively containing fire and preventing its spread.

Wood, while sometimes used for fire doors, typically requires special treatment and construction techniques to meet fire-resistance standards, making steel a more reliable choice for this purpose. Plastic generally lacks the necessary fire-resistance properties required for fire doors, as it can ignite easily and does not withstand high temperatures. Glass in fire doors is usually tempered or specially rated to handle heat; however, it is not as commonly used as steel for primary fire door constructions because of its limitations in terms of overall fire resistance when compared to steel.

Thus, the choice of steel as the material for fire doors primarily reflects its superior fire resistance and structural integrity, helping to ensure safety and compliance with fire safety regulations.