What should be done when removing the roof from a vehicle with a unibody construction?

• A. Place a step chock or other support under the B-post
• B. Place a wedge under the A-post
• C. Use a hydraulic jack under the roof
• D. Remove the B-post first

Answer: (A)

In unibody construction, the roof is part of the structural shell, so removing it without proper support can cause the body to flex, buckle, or lose alignment. The B-post (the vertical pillar behind the door) carries a lot of roof and load transfer during cutting and removal. Providing solid support under the B-post gives a stable contact point that transfers roof loads to the floor and ground, preventing distortion or collapse of the pillar and keeping doors and windows aligned as you work. This approach maintains the integrity of the remaining structure and reduces the risk of unintended damage or injury during roof removal.

Using a wedge under the A-post risks pushing or twisting the front pillar and could distort the body; a hydraulic jack under the roof may crush or slip, and removing the B-post first would remove essential support, making the shell unstable.