Four measures for fire protection of steel structure building
1, outsourcing layer
That is, in the steel structure to add the outer layer, can be cast in situ, can also be sprayed. Cast in place concrete layer is usually strengthened with steel wire mesh or steel bar to limit shrinkage cracks and ensure the strength of the shell. The spraying method can at the construction site of the steel structure to form a protective layer coated on the surface of sand, sand lime can be cement or gypsum mortar, can also be mixed with perlite or asbestos. At the same time, the outer layer can be made of pearlite, asbestos, gypsum or asbestos cement and light concrete.
2, filled with water (water jacket)
The most effective protective measures against fire in the hollow steel structure. This method can make the steel structure in the fire to maintain a low temperature, water circulation in the steel structure, absorb the heat of the material itself. By cooling the heated can be recycled, or by introducing cold water pipe to replace the heated water.
3, shielding
The steel structure arranged in the refractory wall or ceiling, or the gap between two pieces of components concealed in the wall, as long as a little increase or increase the refractory material that can achieve the purpose of fire prevention. This is one of the most economical fire prevention methods.
4, expansion material
The fire protection steel structure, this method has the advantages of fire insulation performance, construction steel structure is not affected by the geometric constraints, generally do not need to add auxiliary facilities, and the coating quality light, there is a beautiful decorative effect, advanced fire prevention techniques to the modern.
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