Final answer:
The vertical members of a door panel are called door jambs. Door jambs are the vertical components that form the sides of a doorframe and provide structural support.
Step-by-step explanation:
The vertical members of a door panel are called door jambs. Door jambs are the vertical components that form the sides of a doorframe and provide structural support.
They are typically made of wood, metal, or stone, and they help to hold the door in place and provide stability.
Door jambs are essential for the proper functioning of a door and play a crucial role in maintaining the integrity of the entire door structure.