Heat and Fire Resistance of Steel Structures

When the temperature is below 150 C, the properties of steel change little. Therefore, the steel structure is suitable for thermal workshop, but when the surface of the structure is radiated by heat at about 150 C, it should be protected by heat insulation plate. The strength and modulus of elasticity of the steel decrease remarkably when the temperature is between 300 and 400 degrees, and the strength of the steel tends to zero when the temperature is about 600 degrees. In buildings with special fire protection requirements, steel structures must be protected by refractories to improve their fire resistance.