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by rony

Sprinklers For The Eisenhower Tunnel

January 18, 2012 in 2012, Emergency, Emergency Medicine, Firefighter, First Responder, Hazards, Homeland Security, Law Enforcement, Security

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The current infrastructure of the United States includes approximately 400-highway tunnels in 35 states and thousands of miles of mass transportation (rail) tunnels. Concerns about fire safety in these tunnels existed long before terrorism exposed their vulnerability, though. These underground fires, occurring in road or railway tunnels, as well as accidents and other issues create extraordinary challenges for firefighters and emergency personnel. One of the most challenging scenarios for a firefighter is battling a blaze deep in the constricted bowels of an underground tunnel, where a fire can heat the tunnel to as much as 1500 degrees Fahrenheit.

Consider the catastrophic consequences of tunnel fires, not only resulting in loss of life and severe property damage, but also in a profound lack of confidence from the public regarding the use of such systems. In an effort to be proactive and safe, the Colorado Department of Transportation (CDOT) desires to install a twenty million dollar sprinkler system in the four-lane, 1.6 mile long Eisenhower-Johnson Memorial Tunnel on Interstate 70. This would undoubtedly make the tunnel safer. The CDOT has asked for Department of Homeland Security (DHS) funding to install a suppression system designed to control heat in the event of a fire, making it easier for fire fighters to enter the tunnel.

Fire safety in rail and road tunnels is challenging because of the specific features of the tunnel environment. A key factor to be aware of is that sprinkler systems are designed to confine a fire to its area of origin. According to a report by the National Fire Protection Association (NFPA), automatic sprinkler systems reduce the risk of home fire deaths and can significantly decrease fire-related property damage. Experts say that sprinklers will most likely extinguish the fire at its incipient stage before it has a chance to grow. The flow of water from fire sprinklers is also intended to drop the core temperature of a fire area. Once the temperature has dropped below what is known as the threshold temperature, fire crews can enter the area and completely extinguish it.

It is very important for one to remember that fire safety in tunnels is a challenging endeavor, mainly due to the specific features of the tunnel environment. A fire in a tunnel can spread from its original source to secondary vehicles very easily, so tunnel fires must be extinguished as quickly as they begin in order to stop it from reaching a critical heat-release rate. This can be achieved by “applying the wet stuff to the red stuff.”

 

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by TVR

Firefighters To Learn Of Meth Hazards

December 22, 2011 in Emergency, Firefighter, First Responder, Hazards

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By: TVR – a 28 year veteran First Responder

First responders are widely recognized as having extremely dangerous and stressful occupations. They often encounter direct danger in situations that are unsafe, violent, and tragic. Trends show expanding numbers of methamphetamine (meth) labs throughout the nation, so in an effort to educate their first responders Hawaii’s Department of Public Safety recently announced that many firefighters throughout the Hawaiian Islands, along with a number of law enforcement agencies, would soon be receiving training on the hazards that can be encountered in meth labs, so that if a clandestine lab is uncovered during the course of their duties, the emergency responders will know how to protect themselves and the surrounding community.

The state Department of Public Safety’s Narcotics Enforcement Division recently announced that it would be holding the training, which they say, is not because of an increase in the number of labs in the islands but, but instead to prepare the responders in the event a clandestine laboratory is discovered.

Methamphetamine also known as “meth,” “speed,” “crank,” “crystal,” and “ice,” is a potent synthetic drug that is synthesized in clandestine drug labs. There are many different chemical “recipes” for “cooking” meth. Each uses different ingredients using a variety of ingredients, but all the formulas have one thing in common, they require ingredients that are flammable and explosive. Recipes vary from using common household products, over-the-counter medications, solvents; metals and strong acids. These labs contain all sorts of hidden hazards. A clandestine meth lab will likely have hazardous, flammable chemicals stored in every type of container imaginable.

Many times firefighters are not be aware of a meth lab operation when responding to an incident. A meth lab is always a hazardous materials incident, these first responders are at risk for numerous health problems when they come in contact with clandestine meth labs during the course of their duties. Production methods involve numerous chemical reactions that can cause fire, explosion, and release of toxic gases. In addition making a pound of crystal meth produces at least five pounds of hazardous byproducts and waste that are both dangerous to breath and possibly explosive, contaminating a residences carpet, wallboard, ceiling tile, furniture or draperies which may absorb spilled or vaporized chemicals thereby making these labs potential hazardous waste sites.

Remember that meth labs pose a definite threat to first responders. If a first responder were to unexpectedly come across an active meth lab they can be susceptible to acute chemical exposure, which can cause lung damage and burns to the body. So to protect responders if a meth lab is suspected, only trained and properly equipped professionals, wearing the appropriate level personnel protective equipment (PPE) should enter the building.

www.homelandsecuritynet.com

 

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by TVR

Structural Collapse And The Firefighter

December 6, 2011 in Emergency, Firefighter, First Responder, Hazards

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By: TVR – a 28 year veteran First Responder

Not knowing what unseen hazards they may encounter, veteran firefighters will tell you there’s always inherent risks in a our jobs. Within the fire fighting community, we know that one of the greatest hazards in firefighting is the threat of structural collapse.

Structural collapse of a building during fire fighting is a leading cause of death among fire fighters. The potential for structural collapse is one of the most difficult factors to predict during initial size-up and risk assessment, and, ongoing fire fighting. Structural collapse of any part of a building (floors, walls, ceilings, roofs, or structural members) during fire fighting often occurs without warning.

According to Deputy Chief Vincent Dunn’s book “Collapse of Burning Buildings: A Guide to Fireground Safety”: upon arrival at a fire scene, in order to determine the structural integrity of a burning building, the incident commander (IC) should consider the following factors: “extent of fire and location, the amount of time the fire has been burning, conditions on arrival, size of the building (single or multistory, floor area, and height), age of the building (deterioration of structural members, and any evidence of weathering), use of lightweight materials in new construction, presence of combustible materials, occupancy, renovations or modifications to the building, previous fires, and supported loads (such as roof-top heating and cooling systems) that might affect the structural integrity of the building.”

Consider that in the future this threat to the firefighters safety will only get worse, as we see the impact of fire on the lightweight engineered wood components being used today in new construction. Residential buildings are increasingly replacing conventional solid joist construction with modern lightweight construction, such as lightweight wood trusses and engineered I-beams, which are used as both roof and floor supports. Under normal conditions these contemporary construction components are said to have the same or better load-carrying capacities as old-fashioned conventional construction, but don’t perform as well under fire conditions mainly because there is less wood to burn, leaving fire crews no margin for safety for the fire crews entering the burning structure.

Firefighters should accept the fact that these new construction materials are here to stay. They are cheaper, and easier to handle than conventional building materials. So understanding the many hazards of lightweight construction will help incident commanders, company officers, and firefighters to evaluate the hazards present prior to and during a given incident and allow a more informed risk/benefit analysis when choosing tactics (offensive/defensive) to be used.

Visit our website at : www.homelandsecuritynet.com

 

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by TVR

Fayette County Firefighters Injured Battling Wind Driven Blaze

November 7, 2011 in Firefighter, First Responder, Hazards

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By: TVR – a 28 year veteran First Responder

Three Fayette County firefighters suffered burns and smoke inhalation while fighting a house fire recently just outside Peachtree City, Georgia. Fire officials say battling the blaze was made more difficult because of severe wind conditions that pushed the fire through the house. Fortunately the firefighters were able to escape the blowtorch which was totally destroyed the home and miraculously escape with only relatively minor injuries.

Be aware there are uncountable natural and human-made hazards in the fire environment, and many variables in the size and scope of these hazards. Veteran firefighters will tell you that by far wind along with flashover and back-draft are the natural phenomenon’s that can have the greatest affect our efforts and personnel safety. There are countless incidents where wind speed and direction has played a major part in causing abnormal and rapid-fire development. These fires may burn with great intensity and create excessively high temperatures, forcing firefighters to retreat from their position with great haste.

Responders need to be prepared for all types of incidents that they may respond to, and be prepared to use the most effective techniques to safely deal with that particular incident. At fires the Incident Commander should never under estimate winds potential effects and should be prepared to account for this hazard when developing tactics and positioning the primary attack hose-line, as well as ordering or controlling ventilation.

Finally consider that the many hazards faced by firefighters at a structural fire are both serious and daunting. In an effort to combat the many hazards fire crews may be faced with, remember that upon arrival at any operation all first responders should be aware of their surroundings and constantly survey the scene for their own safety and the well being of others. Prior to commencing operations, size-up is crucial in identifying and evaluating hazards, points of access/egress, developing tactics, and determining available resources.

www.homelandsecuritynet.com

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