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Flashover
A flashover is the near-simultaneous ignition of most of the directly exposed combustible material in an enclosed area. When certain organic materials are heated, they undergo thermal decomposition and release flammable gases. Flashover occurs when the majority of the exposed surfaces in a space are heated to their autoignition temperature and emit flammable gases (see also flash point). Flashover normally occurs at or for ordinary combustibles and an incident heat flux at floor level of . An example of flashover is the ignition of a piece of furniture in a domestic room. The fire involving the initial piece of furniture can produce a layer of hot smoke, which spreads across the ceiling in the room. The hot buoyant smoke layer grows in depth, as it is bounded by the walls of the room. The thermal radiation, radiated heat from this layer heats the surfaces of the directly exposed combustible materials in the room, causing them to give off flammable gases, via pyrolysis. When the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glossary Of Firefighting
Firefighting jargon includes a diverse lexicon of both common and idiosyncratic terms. One problem that exists in trying to create a list such as this is that much of the terminology used by a particular department is specifically defined in their particular standing operating procedures, such that two departments may have completely different terms for the same thing. For example, depending on whom one asks, a safety team may be referred to as a standby, a RIT or RIG or RIC (rapid intervention team/group/crew), or a Firefighter assist and search team, FAST (firefighter assist and search team). Furthermore, a department may change a definition within its SOP, such that one year it may be RIT, and the next RIG or RIC. The variability of firefighter jargon should not be taken as a rule; some terms are fairly universal (e.g. stand-pipe, hydrant, chief). But keep in mind that any term defined here may be department- or region-specific, or at least more idiosyncratic than one may reali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ventilation (firefighting)
Ventilation is a part of structural firefighting tactics, and involves the expulsion of heat and smoke from a burning building, permitting the firefighters to more easily and safely find trapped individuals and attack the fire. It is frequently performed from the outside of a burning building while the fire is being extinguished on the inside. If a large fire is not properly ventilated, it is much harder to fight, and can build up enough poorly burned smoke to create a smoke explosion or enough heat to create a flashover. Poorly placed or timed ventilation can increase the fire's air supply, causing it to grow and spread rapidly. Flashover from inadequate ventilation can cause the temperature inside the building to peak at over . Types of ventilation In general, there are two types of ventilation; vertical and horizontal. Their names refer to the general locations of the intended exit points of the heat and smoke to be ventilated. Vertical ventilation takes place through holes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saudia Flight 163
Saudia Flight 163 was a scheduled Saudia passenger flight departing from Quaid-e-Azam Airport in Karachi, Pakistan, bound for Kandara Airport in Jeddah, Saudi Arabia, via Riyadh International Airport in Riyadh, Saudi Arabia, which caught fire after takeoff from Riyadh International Airport (now the Riyadh Air Base) on 19 August 1980. Although the Lockheed L-1011-200 TriStar made a successful emergency landing at Riyadh, the flight crew failed to perform an emergency evacuation of the airplane, leading to the deaths of all 287 passengers and 14 crew on board the aircraft from smoke inhalation. The accident is the deadliest aviation disaster involving a Lockheed L-1011 TriStar, and the deadliest to occur in Saudi Arabia. At the time, this was the second-deadliest aircraft accident in the history of aviation involving a single airplane after Turkish Airlines Flight 981 and the third-deadliest overall. Aircraft The aircraft involved in the accident was a Lockheed L-1011-200 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firefighter
A firefighter (or fire fighter or fireman) is a first responder trained in specific emergency response such as firefighting, primarily to control and extinguish fires and respond to emergencies such as hazardous material incidents, medical incidents, and emergencies that require response from the public that threaten life, property and the environment, as well as to rescue persons from confinement or dangerous situations and preserve evidence. Firefighters may also provide ordinance regulations, safety requirements, and administrative public functions for the communities and areas they are subject to jurisdiction to. Male firefighters are sometimes referred to as firemen (and, less commonly, female firefighters as firewomen). The fire department, also known in some countries as the fire brigade or fire service, is one of the three main emergency services. From urban areas to aboard ships, firefighters have become ubiquitous around the world. The skills required for safe oper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backdraft
A backdraft (North American English), backdraught (British English) or smoke explosion is the abrupt combustion, burning of superheated gases in a fire caused when oxygen rapidly enters a hot, oxygen-depleted environment; for example, when a window or door to an enclosed space is opened or broken. Backdrafts are typically seen as a blast of smoke and/or flame out of an opening of a building. Backdrafts present a serious threat to firefighters. There is some debate concerning whether backdrafts should be considered a type of flashover. Burning When material is heated enough, it begins to break down into smaller compounds, including flammable or even explosive gas, typically Hydrocarbon, hydrocarbons. This is called pyrolysis, and does not require oxygen. If oxygen is also provided, then the hydrocarbons can combust, starting a fire. If material undergoing pyrolysis is later given sufficient oxygen, the hydrocarbons will ignite, and therefore, combustion takes place. Cause A ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rollover (fire)
Rollover (also known as flameover) is a stage of a structure fire when fire gases in a room or other enclosed area ignite. Since heated gases, the product of pyrolysis, rise to the ceiling, this is where a rollover phenomenon is most often witnessed. Visually, this may be seen as flames "rolling" across the ceiling, radiating outward from the seat of the fire to the extent of gas spread. Rollover is not the same as flashover A flashover is the near-simultaneous ignition of most of the directly exposed combustible material in an enclosed area. When certain organic materials are heated, they undergo thermal decomposition and release flammable gases. Flashover occurs wh ..., although it may precede it, and the terms may be confused. In the case of rollover, only gases present in the room, not the room contents, ignite. References External links Term of the week: Flameover* Pictures **http://www.ci.frisco.tx.us/departments/fire/PublishingImages/Training%20Center%20-%20Living% ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Canada Flight 797
Air Canada Flight 797 was an international passenger flight operating from Dallas/Fort Worth International Airport to Montréal–Trudeau International Airport, Montréal–Dorval International Airport, with an intermediate stop at Toronto Pearson International Airport. On 2 June 1983, the McDonnell Douglas DC-9, McDonnell Douglas DC-9-32 operating the service developed an in-flight fire in air around the rear Aircraft lavatory, lavatory that spread between the outer skin and the inner decor panels, filling the plane with toxic smoke. The spreading fire also burned through crucial electrical cables that disabled most of the instrumentation in the cockpit, forcing the plane to divert to Cincinnati/Northern Kentucky International Airport. Ninety seconds after the plane landed and the doors were opened, the heat of the fire and fresh oxygen from the open exit doors created flashover conditions, and the plane's interior immediately became engulfed in flames, killing 23 passengers— ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Factory
A factory, manufacturing plant or production plant is an industrial facility, often a complex consisting of several buildings filled with machinery, where workers manufacture items or operate machines which process each item into another. They are a critical part of modern economic production, with the majority of the world's goods being created or processed within factories. Factories arose with the introduction of machinery during the Industrial Revolution, when the capital and space requirements became too great for cottage industry or workshops. Early factories that contained small amounts of machinery, such as one or two spinning mules, and fewer than a dozen workers have been called "glorified workshops". Most modern factories have large warehouses or warehouse-like facilities that contain heavy equipment used for assembly line production. Large factories tend to be located with access to multiple modes of transportation, some having rail, highway and water load ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Western Europe, with a population of 14.9 million. London stands on the River Thames in southeast England, at the head of a tidal estuary down to the North Sea, and has been a major settlement for nearly 2,000 years. Its ancient core and financial centre, the City of London, was founded by the Roman Empire, Romans as Londinium and has retained its medieval boundaries. The City of Westminster, to the west of the City of London, has been the centuries-long host of Government of the United Kingdom, the national government and Parliament of the United Kingdom, parliament. London grew rapidly 19th-century London, in the 19th century, becoming the world's List of largest cities throughout history, largest city at the time. Since the 19th cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burning Of Parliament
The Palace of Westminster, the medieval royal palace used as the home of the Parliament of the United Kingdom, British parliament, was largely destroyed by fire on 16 October 1834. The blaze was caused by the burning of small wooden tally sticks which had been used as part of the accounting procedures of the Exchequer until 1826. The sticks were disposed of carelessly in the two furnaces under the House of Lords, which caused a chimney fire in the two flues that ran under the floor of the Lords' chamber and up through the walls. The resulting fire spread rapidly throughout the complex and developed into the largest conflagration in London between the Great Fire of London, Great Fire of 1666 and the Blitz of the Second World War; the event attracted large crowds which included several artists who provided pictorial records of the event. The fire lasted for most of the night and destroyed a large part of the palace, including the converted St Stephen's Chapel—the meeting place ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charleston Sofa Super Store Fire
The Charleston Sofa Super Store fire was a firefighting accident that occurred on the evening of June 18, 2007, in Charleston, South Carolina, resulting in the deaths of nine firefighters. It was the List of the deadliest firefighter disasters in the United States, deadliest firefighter disaster in the US since the September 11 attacks. The fire, which started in the loading dock of the furniture store, rapidly spread to the main showroom and warehouse, leading to a catastrophic structural collapse. Despite initial firefighting efforts and rescue attempts, the poor water supply and lack of fire sprinkler systems contributed to the incident. The site was cleared after the fire, and a new fire station was constructed nearby. Fire and collapse The fire occurred at the Sofa Super Store, composed of a single-story steel trussed showroom building with a warehouse building located behind the retail space, located at 1807 Savannah Highway in Charleston. The building had no fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
