Guidelines for Emergency Ventilation Smoke Control in Roadway Tunnels (2017) / Chapter Skim
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Pages 49-56
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49 Tunnel Fixed Firefighting Systems and Ventilation Impact Active tunnel fire protection systems can be classified as fixed systems and standpipe systems. Fixed fire protection systems used in road tunnels are fixed, water-based firefighting systems.
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Advantages of FFSS Challenges of FFSS General FFFS is designed to react on an early stage of the fire. Controls fire by not allowing it to further grow, or grow slowly, or extinguishing a small fire.
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51 San Pedro de Anes (Spain)
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52 observed, displacement of the zone covered by the FFSS was insignificant [50]
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53 air temperature. The temperature tenability requirements can be met with less ventilation; however, smoke toxicity and air humidity are a concern.
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54 Table 5.3 provides a sample analysis of additional benefits and considerations to be addressed when analyzing a FFSS in addition to a single point extraction ventilation system. Similar analysis can be provided for other types of ventilation systems.
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55 tial phase of a fire. It is obvious that FFFS systems are beneficial for emergency and rescue services and could be effective in protecting the tunnel infrastructure and delivering human safety.
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56 of the air flow direction take place. The emergency response time is to be based on NFPA 1710.
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