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Design Fires in Road Tunnels (2011) / Chapter Skim
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Pages 16-19

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From page 16...
... 17 To understand and interpret the objectives of fire regulations it is necessary to have basic knowledge in the physics of fire, tenable limits for escaping civilians and firemen, and damage criteria for tunnel construction and equipment. Fire produces high temperatures, heat radiation, a low concentration of oxygen, low visibility, and different lethal toxic and/or corrosive gases.
From page 17...
... the fire where conditions are changing rapidly. Near the fire the radiation is created by the fire itself, as well as the hot smoke.
From page 18...
... 19 TOXICITY The toxicity of fire smoke is determined primarily by a small number of gases, which may act additively, synergically, or antagonistically (21)
From page 19...
... This limitation does not allow using fixed fire suppression systems in many tunnels. Although the visibility criteria were developed for smoke and toxic gases, the question arises as to whether the same criteria should be applied to water or water mist.


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