four measures to protect steel building fire Must

Hainan Steel teach you: four measures to protect steel building fire Must

Hainan Steel Steel is a building material does not burn, it has a seismic, flexural properties. In practice, the relative increase in both steel load capacity of the building, but also to meet the needs of the construction design aesthetic styling, but also to avoid the concrete and other building materials can not be bent, stretched defect, therefore, by the Hainan steel steel construction industry's favor, single, multi-layer, skyscrapers, factories, warehouses, waiting rooms and airport terminals, such as the use of steel are very common. However, Hainan steel and steel as a building material, there are some unavoidable defects in fire prevention, its mechanical properties, such as porosity, temperature increases due to a sharp decline in the yield point, tensile strength and modulus of elasticity.
Hainan Steel usually at a temperature of 450 degrees Celsius to 650 degrees Celsius in the load carrying capacity will be lost, the occurrence of large deformation, resulting in steel columns, steel beams bent, because the result is too large deformation can not continue to use, generally unprotected steel fire resistance of the structure is about 15 minutes. This length of time is also related to the velocity of the endothermic member. To overcome the steel material in the practical application inadequate fire protection, the need for fire prevention, the aim is to improve the fire resistance of steel to design specification limits. Protect steel in the fire rapidly warming deform slump, its measures are varied, the key is to take different approaches under different circumstances, such as the use of insulation, refractory steel barrier direct flame burning, reduce the speed of heat transfer delayed steel temperature, strength becomes weak time. But no matter what method adopted, the principle is the same. Therefore, I believe in the reality of four steel structure fire protection measures must be given attention.
Cladding. As the name suggests, is to add steel outer cladding, cast molding can be applied by spray. Cast concrete cladding formed entity usually steel or steel mesh to strengthen, to limit shrinkage cracks, and ensure the strength of the housing. Spray can at the construction site on the steel surface to form a protective layer applied mortar, mortar, cement or lime plaster may be mortar, perlite or asbestos may also be incorporated. Meanwhile, the cladding can also be used perlite, asbestos, or asbestos cement plaster, lightweight concrete made of prefabricated panels, the use of adhesives, nails, bolts to the steel.
Filling water of sets. Water-filled hollow steel structure against fire is the most effective protective measures. This method enables the steel to maintain a lower temperature in the fire, the water circulating in the steel structure, the absorption material itself heated heat. After cooling the heated water can be recycled or by the introduction of cold water pipes to replace the heated water.
shield. Steel is set in the wall or ceiling of refractory material, or occlusion member in the space between the two walls, as long as the increase or not to increase a little refractories that can achieve the purpose of fire prevention. This is one of the most economical methods of fire.
Swellable material. Using fireproof paint protection member, this method has good fire insulation, steel construction without geometric restrictions, etc., generally do not need to add auxiliary facilities, and a light coating quality, as well as some beautiful decorative effect, It belongs to the modern technology of advanced fire protection measures.
Currently, high-rise steel buildings is increasing, especially in some high-rise building, with steel in the form of more widely. Once a high-rise building fire accident, the fire in a short time can not be extinguished, which requires Hainan steel in building design, construction materials increase fire protection, to enhance fire resistance, and develop the necessary inside the building emergency programs to reduce casualties and property losses.