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Steel structure fire protection

Author:admin Date:2012-10-30 12:46:20

According to the steel type, shape, location, installation requirements of the fire, there is a need for different design structure and construction method, scientific, reasonable design and installation structure, has a great influence on the weatherability of. Even for the same kind of sheet metal, to protect the same components, design structure, will be totally different results, the science of fire protection for steel structure will greatly improve the weathering performance of steel structure. The fire protection of steel structure are usually one of the following ways:

Fire retardant coatings for steel structure: steel structure fire retardant coating is applied to buildings and structures on the surface of steel structure, can form a refractory heat insulation protective layer, to improve the steel structure fire resistance coating, divided into thick, thin, thin and several. Thick type granular, the thickness of the coating is usually over 8 mm, construction method for spray coating, high temperature on the thickness of coating itself and low thermal conductivity to components of the heat insulation function. Thin and ultrathin coating thinner, has a certain decorative effect, the construction method can be sprayed brush, high temperature coating expansion Thickening Steel member. With light weight hydraulic molding machine, the requirements of the use and maintenance of construction is relatively simple, suitable for concealed structure and bare steel, and other steel brace.

Charging method: in the hollow steel member is filled with water from fire is the most effective method, can make the steel structure in fire to keep lower temperature. Water in the structure of inner loop, heating water can be recycled after cooling, or by introducing cold water pipes to replace heating water. This method in foreign countries are widely used in steel column protection. This method has the advantages of low cost, the hollow steel leakage, corrosion resistance high, applies only to the hollow steel protection.

Light fireproof plate coated method: using inorganic fireproof board for large steel member box package, such as gypsum board, vermiculite plate, non-asbestos calcium silicate insulation board, plate thickness according to the limit of fire resistance requirements. This method has the advantages of convenient construction, decoration surface smooth, low cost, small loss, no environmental pollution, short construction cycle, aging resistance and other advantages, good popularization prospect of fire protection for steel structures, is a new development direction.

Composite protection law : close to the steel fire retardant paint or flexible felty insulation material, external fire sheet cover panel. This method is applied to a surface decorative requirements, generally used for paste required flexible felty insulation material or coated thick fireproof coating for steel column.


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