To access the remainder of this piece of premium content, you must be registered with Firehouse. Already have an account? Login
Register in seconds by connecting with your preferred Social Network.
Complete the registration form.
Subject: NFPA 1670 Vehicle Rescue, Technician-level Skills and Competencies
Topic: Advanced Hands-on Training Skill: Total Roof Removal, Roof-resting Vehicle
Objective: Given the scenario of a vehicle resting on its roof with an occupant trapped inside, the decision has been made to totally remove the roof. Crews must stabilize the vehicle and complete a total roof removal evolution.
Task: Totally remove the roof of a vehicle while the vehicle is resting on its roof on a level surface.
This University of Extrication column is the sixth and final installment in a multi-part series presenting advanced technician-level vehicle rescue training scenarios. This column describes a rescue challenge that meets the criteria of a technician-level skill and competency of NFPA Standard 1670.
This scenario is based on an incident where a sedan has rolled onto its roof. The driver occupant remains seated and belted, and is now suspended upside-down inside the vehicle. EMS personnel have accessed the patient and are now requesting that the entire roof of the vehicle be removed so the patient can be extricated.
The rescue team has several tasks ahead of them. First, stabilization of the vehicle must be accomplished. After the vehicle is stable, hazards need to be controlled. Then, the vehicle may have to be lifted slightly to take the load off the roof. Once the load is off the roof, the roof-removal process can begin by removing side and rear glass and “disconnecting” the roof from the windshield. Finally, after the roof is removed, the simulated patient can then be extricated. Let’s look at these tasks one at a time.
Stabilization involves taking a roof-resting vehicle and securing it enough that crew members can work in, around and under the vehicle without fear of vehicle movement or collapse. A rollover vehicle is most commonly engine heavy so crews will generally find the engine, windshield, and the portion of the vehicle ahead of the firewall contacting the ground. The rear of the vehicle will be off the ground.
The most efficient stabilization of a roof-resting vehicle is accomplished by use of a tensioned buttress stabilization system. These struts must be strategically placed so that when the roof pillars are cut, there is sufficient room to maneuver the roof out from underneath the vehicle.
In lieu of struts, cribbing can be used although this is less effective and not as safe as with the strut systems. Cribbing blocks are placed on both sides of the vehicle at the base of the A-pillar near the firewall. This area of the vehicle is close to the ground and will not require a lot of cribbing. At the rear C-pillar area, box cribs will be needed. To maintain the stability of the cribbing, the height of the box crib should not go higher than three times the length of the blocks. In other words, using 18-inch-long cribbing, the box crib should not be higher than 4½ feet. As cribbing is stacked higher, it becomes inherently more unstable. Also, the slant of a roof-resting vehicle can make building a solid box crib along the trunk and rear fender area difficult. Once built, keeping the cribbing intact along the rear of the vehicle will also be a challenge.
Rescuers may find that a lot of the weight of the vehicle is resting on the roof. This makes access to the front roof and pillar area difficult. The two critical locations to inspect are along the header of the windshield and the front A-pillars. Due to the rollover, they may have collapsed and be directly contacting the ground. Lifting the vehicle slightly can make roof removal a whole lot easier.
Crews can stabilize the vehicle at the rear C-pillar area and apply a lifting force along each side at the firewall area. Do not over lift. Just enough to get the weight off the roof line and the front A-pillar is sufficient.