Courtesy : en.wikipedia.org
Firefighting
Firefighting is the act of attempting to prevent the spread of and extinguish significant unwanted fires in buildings, vehicles, and woodlands. A firefighter suppresses fires to protect lives, property and the environment.
Firefighters typically undergo a high degree of technical training.This involves structural firefighting and wildland firefighting. Specialized training includes aircraft firefighting, shipboard firefighting, aerial firefighting, maritime firefighting, and proximity firefighting.
One of the major hazards associated with firefighting operations is the toxic environment created by combustible materials. The five major risks are smoke, oxygen deficiency, elevated temperatures, poisonous atmospheres, and violent air flows.To combasome of these risks, firefighters carry self-contained breathing apparatus. Additional hazards include falls – a constant peril while navigating unfamiliar layouts or confined spaces amid shifting debris under limited visibility – and structural collapse that can exacerbate the problems encountered in a toxic environment.
The first step in a firefighting operation is reconnaissance to search for the origin of the fire and to identify the specific risks.
Fires can be extinguished by water, fuel or oxidant removal, or chemical flame inhibition; though, because fires are classified depending on the elements involved, such as grease, paper, electrical, etcetera, a specific type of fire extinguisher may be required. The classification is based on the type of fires that the extinguisher is more suitable for. In the United States, the types of fire are described by the National Fire Protection Association.
History
Bulgarian firefighters in action, 1930s
Ottawa Fire Department motor pump, Ottawa, Ontario, taken by the Topley Studio, May 1915.
Main article: History of firefighting
The earliest known firefighters were in the city of Rome. In 60 A.D., emperor Nero established a Corps of Vigils (Vigiles) to protect Rome after a disastrous fire. It consisted of 7,000 people equipped with buckets and axes who fought fires and served as police.
Historic tactics and tools
In the 3rd century B.C., an Alexandrian Greek named Ctesibius made a double force pump called a siphona. As water rose in the chamber, it compressed the air inside, which forced the water to eject in a steady stream through a pipe and nozzle.
In the 16th century, syringes were also used as firefighting tools, the larger ones being mounted on wheels.Another traditional firefighting method that survived was the bucket brigade, involving two lines of people formed between the water source and the fire. Typically, men in one of the lines would pass along the full buckets of water toward the fire while in the other line women and children would pass back the empty buckets to be refilled.
In the 17th century the first “fire engines” were made, notably in Amsterdam. In 1721, the English inventor Richard Newsham made a popular fire engine that was essentially a rectangular box on wheels filled using a bucket brigade to provide a reservoir while hand-powered pumps supplied sufficient water pressure to douse fires at a distance.
Ancient Rome
Ancient Rome did not have municipal firefighters. Instead, private individuals relied on their slaves or supporters to take action. They would not only form bucket brigades or attempt to smother smaller fires, but would also demolish or raze nearby buildings to slow the spread of the fire. However, there is no mention of fires being extinguished, rather they were contained and burned themselves out. Ancient Rome did not have an organized firefighting force until the Vigiles were formed during the reign of Augustus.
The first ever Roman fire brigade was created by Marcus Licinius Crassus. Fires were almost a daily occurrence in Rome, and Crassus took advantage of the fact that Rome had no fire department, by creating his own brigade—500 men strong—which rushed to burning buildings at the first cry of alarm. Upon arriving at the scene, however, the firefighters did nothing while Crassus offered to buy the burning building from the distressed property owner, at a miserable price. If the owner agreed to sell the property, his men would put out the fire; if the owner refused, then they would simply let the structure burn to the ground. After buying many properties this way, he rebuilt them, and often leased the properties to their original owners or new tenants.