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FIRE SUPPRESSION <br /> With an accomplished pre-incident plan, tires to compress on themselves <br /> decisions regarding size-up, tactics, complicating fire fighting efforts, and sets <br /> strategies, and overhaul can be resolved the stage for incomplete combustion and <br /> quickly. The foundation of fire pyrolysis. <br /> suppression should be based upon the <br /> data collected before the fire. Realizing If tires are hard to light, they are even <br /> what has worked historically in tire fires harder to fight. The construction of a tire <br /> around the country will also aid in the exposes large surface areas towards the <br /> decision making process. These decisions fire. Additionally, the interior air space <br /> should be based upon your understanding traps enough oxygen to assist in <br /> of the dynamics and behavior of a tire combustion. This complex geometry, <br /> fire. compounded with storage techniques that <br /> again increase the air space and surface <br /> area of the tires, is difficult to get to with <br /> TIRE FIRE DYNAMICS working lines. <br /> The basic tenets of combustion-- that <br /> combustible material must pass from a STAGES OF COMBUSTION <br /> solid, to a liquid, to a gas-- holds true for <br /> tires. Tires form flammable vapors Tire fires can be divided into three stages: <br /> between 500 to 700 degrees centigrade or <br /> 932 to 1,292 degrees fahrenheit. In Incipient <br /> comparison wood forms flammable vapors , Free Burning <br /> at around 400 degrees centigrade or 752 , Smoldering <br /> degrees fahrenheit. <br /> Incipient Stage <br /> Char forms on the outer surfaces of wood <br /> acting as a fire resistive barrier to radiant The incipient stage of a tire fire begins <br /> heat. The individual cells of wood with a point of ignition. Once a tire has <br /> material further insulate against radiant gained an open flame front, the heat of <br /> heat. Tires on the other hand, lack any the fire is absorbed by the surrounding <br /> resistance to radiant heat. The heat from tire material. At this point immediate <br /> radiated sources is absorbed and interdiction-- separating the burning tires <br /> transferred to the steel belts and bead from rest of the pile and/or applying water <br /> wire found in modern tires. Tires then, and foam-- would eliminate the threat to <br /> are difficult, but not impossible to ignite. the remaining tires. <br /> Tires begin to lose their rigidity at a <br /> temperature as low as 210 degrees <br /> centigrade or 410 degrees fahrenheit. <br /> This softening of the tire material allows <br /> 45 <br />