Monday, June 26, 2017: 9:45 AM-10:45 AM
Building Life Safety Systems
Chair:
Peter McDonnell, McClure Engineering, Inc.
This session presents the latest ASHRAE research project on fire stairway tower test validation of CFD modeling, the installed fire & life safety systems installed in a modern large underground metro system and life safety considerations in Tunnel Smoke Control Systems. The real world issues associated with providing integrated Life Safety Systems that incorporate both current and potentially new Code considerations is discussed. These papers provide valuable insights into current and new standard considerations for many types of buildings.
1 Pressurized Stairwells with Open Doors and the IBC (LB-17-C026)
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John Klote, P.E., John Klote Fire and Smoke Consulting
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Paul Turnbull, Siemens Building Technologies, Inc.
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Douglas H. Evans, Clark County Building Division
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In the past, the International Building Code (IBC) has required pressurized stairwells to maintain pressurization with all exit doors closed. Most jurisdictions in the U.S. are adopting the 2015 IBC that considers the status of exterior doors as opened or closed. A 2016 ASHRAE research project (RP-1447) has shown that a tenable environment can be maintained in stairwells with many open doors provided that the stair doors on the fire floor are closed. Smoke that leaks into the stairwell is quickly diluted resulting in a tenable environment in the stairwell. There are stairwell systems that are intended to maintain pressurization with a number of open doors, but many such systems are complex and have dangerous failure modes. This paper discusses these issues including suggested stairwell pressurization systems.
2 Fire and Life Safety Systems at Delhi Metro Underground Stations (LB-17-C027)
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Rajesh Kumar Jain, Delhi Metro Rail Corp. Limited
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Anoop Kumar Gupta, Delhi Metro Rail Corp. Limited
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Abdhesh Kumar Singh, Delhi Metro Rail Corp. Limited
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Delhi Metro is the world’s thirteenth largest metro system in terms of length and is India's first modern public transportation system built on state of the art technologies. The life safety systems are of paramount importance while carrying millions of passengers daily, the systems are required to be designed in such a manner that in case of any emergency situation the passengers shall be safely evacuated from transit network in minimum time. This paper discusses in detail the different life safety systems provided in the underground metro station building e.g. Smoke Management System, Fire Fighting System, Fire Alarm System, Emergency Power Supply System and Emergency Lighting System.
3 Life Safety Considerations in Tunnel Smoke Control (LB-17-C028)
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Yoon Ko, Ph.D., National Research Council Canada
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Ahmed Kashef, P.E., National Research Council Canada
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Mechanical Emergency Ventilation Systems (EVS) have been widely used in tunnels to mitigate fire hazards. However, a number of catastrophic tunnel fires have occurred and have raised questions about the effectiveness of the current tunnel fire safety systems. This paper discusses life safety issues that need to be considered in designing different types of the EVS commonly used in tunnels including transverse and longitudinal ventilation systems. It also discusses how airflow induced by the longitudinal and transverse ventilation systems could impact on the fire development and smoke dispersion in the tunnel. Tenability along the length of the tunnel produced by each type of the ventilation systems is also examined.
