Which term is the bottom edge of the door opening on a vehicle's body?

Which term is the bottom edge of the door opening on a vehicle's body?

• A. Roof rail
• B. Nader side
• C. Rocker panel
• D. Hinge side

Answer: (C)

The bottom edge of the door opening is the rocker panel. This structural member runs along the lower side of the vehicle between the front and rear wheels, forming the lower boundary of the door opening. It provides essential support and helps protect the cabin from road debris. In extrication work, recognizing the rocker panel helps locate a stable point for stabilizing the vehicle and guiding tool placement. The roof rail sits at the top edge of the vehicle, not bottom; the hinge side is the vertical edge where the door is attached, and the term “Nader side” isn’t used to describe the bottom opening edge.

The bottom edge of the door opening is the rocker panel. This structural member runs along the lower side of the vehicle between the front and rear wheels, forming the lower boundary of the door opening. It provides essential support and helps protect the cabin from road debris. In extrication work, recognizing the rocker panel helps locate a stable point for stabilizing the vehicle and guiding tool placement. The roof rail sits at the top edge of the vehicle, not bottom; the hinge side is the vertical edge where the door is attached, and the term “Nader side” isn’t used to describe the bottom opening edge.