The flue of a high-rise building should run through from top to bottom.
current standard
1, Article 6.8.2 of Code for Residential Design (GB50096-20 1 1) requires that the vent product itself should be an assembled vent product that can prevent all floors from flowing backwards. Article 6.8.2 of Code for Residential Design (GB50096-20 1 1) also stipulates that the exhaust duct product itself must have backflow prevention structure.
2. The Exhaust Pipe of Kitchen and Toilet in Residential Buildings (JG/T 194-2006) promulgated by the Ministry of Construction is applicable to exhaust pipes made of various raw materials (except sulphoaluminate cement and portland cement, raw materials must obtain relevant new material application certificates).
3. The building materials industry standard "Glass Fiber Reinforced Cement Smoke Exhaust Pipe" (JC/T854—2008) promulgated by the National Development and Reform Commission is applicable to the residential smoke exhaust pipes made of sulphoaluminate cement and silicate cement with alkali-resistant glass fiber mesh. Sulfoaluminate cement and portland cement are the raw materials of exhaust port with stable performance.
4. Article 7.2.9 of the national standard Code for Fire Protection Design of Buildings (GB500 16—2006) stipulates that vertical tube wells for smoke exhaust, exhaust and garbage should be set independently; The shaft wall shall be incombustible, and the fire resistance limit shall not be lower than1.00h.
5. Article 9.4.3 of the National Standard Code for Residential Buildings (GB 50368—2005) stipulates that the installation of vertical shafts in residential buildings should meet the following requirements: cable vertical shafts, pipe vertical shafts, smoke exhaust ducts and exhaust ducts should be set independently, and the walls of vertical shafts should be made of incombustible components with fire resistance not less than1.00h. ..
6. On February 23rd, 2006, a disaster occurred in Building 14, Guoruicheng Community, Chongwen District, Beijing. The fire was caused by a resident on this floor who caught fire because of the leakage of kitchen appliances. After the fire, a large amount of smoke spread to other upper and lower floors along the exhaust duct, causing fire accidents. The problem of the accident is that the fire resistance limit of the centralized exhaust pipe in the residential kitchen can not meet the requirements of the national standard. On June 3, 2009, the smoke exhaust pipe on the fourth floor of a high-rise building at the intersection of Chongzhi Road and Jianhe Street in Changchun City caught fire. On 20 11February1day, a fire broke out on the third floor of a high-end residential area in Tianquan Road, Fuzhou. The big fire damaged the flue in the kitchen, and the fire was very fierce. In just half an hour, the fire spread from the third floor to 12 floor, affecting 10 households. The centralized smoke exhaust duct of residential buildings has gradually become a fire hazard due to the long-term accumulation of oil pollution. Most of the exhaust ducts are manufactured by the new patented technology of Jiangsu Zijinshan Institute of Building Technology, and the inorganic refractory flue plates are mechanically assembled. The patented variable pressure gas extraction module developed by Zijinshan Institute of Building Technology is installed in the flue, so as to eliminate the smoke smell, the type inspection must be carried out according to the national standard GB/T 17428-2009, and the fire resistance limit should reach1.0h.