The influence of gaps of fire-resisting doors on the smoke spread in a building fire |
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| Affiliation: | 1. School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney 2052, Australia;2. School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Vic. 3083, Australia;3. Fire Safety and Disaster Prevention Group, Department of Building and Construction, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong (SAR), PR China;4. Australian Nuclear Science and Technology Organisation (ANSTO), PMB 1, Menai, NSW 2234, Australia;1. National Science and Technology Center for Disaster Reduction, Department of Earthquakes and Manmade Disaster, 9F., No. 200, Sec. 3, Beisin Rd., Sindian District, New Taipei City 23143, Taiwan, ROC;2. Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa City, Ishikawa 9201164, Japan;1. Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Laboratoire ETIC, 13115 St Paul Lez Durance, France;2. Aix-Marseille Université (AMU) IUSTI UMR 6595, Laboratoire ETIC, 5 rue Enrico Fermi, 13453 Marseille, France;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China;2. Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou, Jiangsu 215123, China;1. State Key Laboratory of Gas Disaster Monitoring and Emergency Technology,Chongqing 400037,China;2. Department of Civil and Architectural Engineering, City University of Hong Kong and USTC-CityU Joint Advanced Research Centre, Suzhou 215000. China;3. State Key Laboratory of Fire Science, University of Science and Technology of China and USTC-CityU Joint Advanced Research Centre, Suzhou 215000. China |
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| Abstract: | Many building codes stipulate the need for fire-rated doors to be closely fitted around their edges to impede the passage of smoke and flame. To ensure the smooth opening of the doors, gaps between the door panels and the walls and floor cannot be totally eliminated. Depending on the country where the building code is enforced, the maximum permissible door gap requirement varies substantially. To better understand the influence of gap sizes on the smoke spread, a numerical study is performed on the different door gap configurations affecting the smoke egress in an enclosure fire. The results show that the height of the door gaps has a significant effect on the pressure and temperature distribution in controlling the smoke spreading. Larger door gaps have shown to allow more hot smoke transgressing through the door gaps as well as cold air re-entraining back into the burn room. Fire-rated door with a 3 mm door gap have demonstrated to be the best measure for impeding smoke spread while maintaining reasonable smoothness for the door movement. |
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