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Big Tree VFC - School Bus Extraction - pg. 1


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Stabilization of a School Bus on all our four wheels

Accidents involving school buses have the potential to stretch resources to the limit while simultaneously stressing out rescuers. Multiple victims, young children and a vehicle we do not commonly work on all combine to make for a challenging event. Fortunately, the tools we already possess for standard vehicle extrication are the same tools we use in school bus disentanglement. Only a knowledge of school bus construction and extrication techniques need be learned. The rescue technician needs to recognize that because of the size and construction of a school bus, rescue evolutions may take longer. However, built-in safety features can also aid us in our extrication evolution.

Before beginning to extrication patients from a school bus, it is important to chock the wheels to prevent rolling, shut off the engine and disconnect the batteries, and control the fuel systems and any leaks. Stabilization of a school bus may require a large amount of cribbing. Preplanning and having the correct size and amount of cribbing on hand is vital. We have found that 6 X 6 timbers cut to 24 inch lengths makes quick work of building box cribbing. Also, inverted step chocks work well to fill any remaining voids. Airbags also may come in handy when lifting is required. The ladder frame of the bus provides for ample locations to stabilize the bus. In general, the back bumper and forward firewall often provide good points to place cribbing. Remember to tuck cribbing far enough under the vehicle to avoid interference with other rescue activities. A bus on its side often is very stable. Depending upon terrain conditions, all that may be required is to fill voids.
4 X 4 cribbing is used to chock the tires of the school bus. Chocking prevents the vehicle from inadvertently rolling.
 
6 X 6 Box cribbing with inverted step chocks makes quick work of cribbing the school bus.
6 X 6 box cribbing is placed beneath the front step near the firewall. The firewall provides a strong point for stabilization.
6 X 6 box cribbing is placed beneath the rear bumper which is directly attached to the frame.
6 X 6 box cribbing and inverted step chocks adequately stabilize the driver's side firewall. Note that tires are not deflated.
 
2017 Big Tree Volunteer Fire Company
Hamburg, NY

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