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.

災(zāi)死亡的原因分析，結(jié)構(gòu)破壞致死的比例是5%，直接被火燒死的比例是20%，有毒煙氣致死的比例高達(dá)75%。而防排煙管道的作用為人員提供了時(shí)間和條件。這也對(duì)防排煙管道的性能要求高：一、結(jié)構(gòu)，保持完整性，防止躥火，二、不燃隔熱，避免燃燒和引燃，助燃。

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.

作為擁有多年建筑材料研發(fā)、生產(chǎn)經(jīng)驗(yàn)的工廠來說，根據(jù)標(biāo)準(zhǔn)研發(fā)了防排煙系統(tǒng)解決方案。它是由鍍鋅板+巖棉（50mm）+防火板組成的。耐火極限中9mm的防火板可以達(dá)到120min，12mm防火板可以達(dá)到180min。

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、消防排煙風(fēng)管對(duì)于比較復(fù)雜的民用建筑，在設(shè)計(jì)階段，各工種先應(yīng)協(xié)商好空間分隔，定出每種管道的標(biāo)高范圍。一般情況下不得越出給自己規(guī)定的界限。遇有個(gè)別管段要越界時(shí)應(yīng)與通風(fēng)管道其他工程協(xié)商。

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、解決各種消防排煙風(fēng)管相碰及協(xié)調(diào)的原則，一般為：“小管讓大管，有壓讓無壓”。例如，自來水管與風(fēng)管相撞，則應(yīng)當(dāng)自來水管拐彎。冷、熱水管與下水管相碰，則應(yīng)改變冷、熱水管道。

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、消防排煙風(fēng)管施工前應(yīng)設(shè)備總管的工程師，將各工種的管線，單線畫在一張平面圖上。每種管道用一種彩色筆。在各交點(diǎn)處綜合其標(biāo)高，看是否有矛盾之處，及時(shí)發(fā)現(xiàn)，將問題解決在安裝之前。

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、為了減少投資，節(jié)省空間，降低層高，有些敷設(shè)無坡度要求的消防排煙風(fēng)管，可以穿梁敷設(shè)(如自來水管道，消防噴灑干管等)。

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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