A well-trained truck company can make the incident commander's job easier by identifying problems inside the fire building that might be unknown to command personnel. They are like combat engineers in the military who go in ahead of the main force and lead the way, removing obstacles for...
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Because of the problem with modern construction, many fire departments have turned to positive-pressure ventilation (PPV). Here is our vent-low statement: Rather than creating openings in a structure to let the smoke out, high-pressure fans pump air into a fire building. This approach, though widely used, must be used carefully or it can spread the fire. You must be ready to move in quickly and take advantage of the effects of the PPV on the smoke and fire conditions. And you must have enough fans to do the job.
Vent often means to take any opportunity to let smoke out when you can. As you move through the building on your search pattern, pause and open windows wherever possible. If you are in a position to use roof ventilation, create one large opening (four by six feet minimum). This will have a better effect than a bunch of small holes and there will be fewer chances to fall through the roof if there are fewer holes.
Do not forget the old horizontal school of ventilation theory. Open windows on the leeward side first and then move to the windward side. This will allow a natural cross movement of air. You open the windows in the leeward/windward fashion so that there is not a sudden buildup of air. This may stimulate a backdraft if all other conditions are right.
When you think you are done, there is always one more thing to do. We have already addressed rescue, ventilation and laddering. Other tasks that you may need to consider are:
• Check for fire extension
• Utility control
• Ladder pipe operations
• Property conservation as needed
Salvage has become the stepchild of the fire service. Many years ago, we took pride in this task. How many of you can remember being taught to leave the building in better shape than when you arrived? This is not necessarily the case any longer. Nonetheless, you should strive to preserve as much property as possible.
The primary problem comes from the fact that water is our weapon of choice. But effective salvage operations can reduce the damage toll. You can cover belongings, remove water from the building or remove endangered property to the exterior. Another aspect of salvage that is frequently overlooked involves removing water from the fire building to prevent structural damage.
The truck company is a critical component to leaving the building in a safe condition. They do this via the overhaul function. A truck company must overhaul in order to:
• Prevent rekindle
• Preserve any evidence of arson which you may find
• Do as little damage as possible
• Protect personal belongings
Ceilings, floors and walls must be opened up as needed. This will uncover the hidden fire that could spread unchecked if it is not found by the truck company. A number of very good stops have been made by firefighting crews that have opened up the fire building in order to cut off the fire. Many firefighters have been killed or injured because they were unaware of the presence of fire in a hidden area until it was too late. One of the primary objectives of a truck company is to "get it open."
Finding the fire can be a primary or secondary task for a truck company. You may well find some fire extension as an incidental sideline to search, rescue, ventilation and forcible entry, or it may be your primary task during overhaul. You should be aware of where the nearest hoseline is. You must be able to call for water whenever and wherever you need it. Prompt fire extinguishment can save a lot of time and property. A competent truck company can assist in this task.
Do not overlook building utilities during your fireground operations. A team of two firefighters should be ready to shut off gas, water and electric. This team should be equipped with a portable radio to maintain contact with command.
Fire personnel should be also trained to look for clues indicating a fire may have been intentionally set. Such things as multiple points of origin, excessive structural damage and familiar aromas should be noted and passed up the chain of command so that it can reach the proper investigative group. This training and experience will be particularly valuable during overhaul.
Property conservation is an operational area frequently overlooked by suppression personnel. You need to be sure that unnecessary damage is not done by operational personnel. Covering furniture and personal property with tarps and salvage covers can prevent water damage. De-watering operations include portable pumps, water vacuums, water slides and structural alterations that shunt water out of the building. People will remember that you took care not to do excessive damage to their property.