Smoke control air duct is the general name of the air duct of the mechanical pressurized air supply and smoke control system that passes through the building according to the requirements of the design code, or is located in the fire hazard area, and the air duct of the mechanical and smoke exhaust system that crosses the fire compartment.
Analysis of the causes of death caused by the disaster shows that the proportion of death caused by structural damage is 5%, the proportion of death caused by direct fire is 20%, and the proportion of death caused by toxic smoke is as high as 75%. The role of smoke control pipes provides time and conditions for personnel safety. This also requires high performance of smoke control and exhaust pipes: first, the structure is safe, the integrity is maintained, and the fire jump is prevented; second, incombustible heat insulation, combustion and ignition are avoided, and combustion is supported.
As a factory with many years of research and development and production experience in building energy-saving materials, it has developed smoke control system solutions according to national standards. It is composed of galvanized sheet+rock wool (50mm)+fireproof sheet. In the fire resistance limit, 9mm fireproof board can reach 120min, and 12mm fireproof board can reach 180min.
1. For the more complex civil buildings, the space separation of each type of work shall be negotiated and the elevation range of each type of pipe shall be determined at the design stage. Generally, you should not go beyond the limits set for yourself. In case of crossing boundary of individual pipe section, it shall be negotiated with other works of ventilation pipeline.
2. The principle to solve the collision and coordination of various fire smoke exhaust air ducts is generally: "small pipes give way to large pipes, and pressure gives way to no pressure". For example, if the water pipe collides with the air pipe, the water pipe should turn. If the cold and hot water pipes collide with the downpipe, the cold and hot water pipes should be changed.
3. Before the construction of the fire and smoke exhaust air duct, the engineer of the main equipment pipe shall draw the pipelines and single lines of each type of work on a plan. Use a color pen for each type of pipe. The elevation of each intersection shall be integrated to see if there is any contradiction, and the problem shall be solved before installation.
4. In order to reduce investment, save space and reduce floor height, some fire smoke exhaust ducts without slope requirements can be laid through beams (such as water pipes, fire spray main pipes, etc.).
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