what is a car frame
Driver's A-Pillar or Passenger B-Pillar. Are you sure you mean the 'A-Frame', or do you mean the 'A-Pillar'? The frame of the car supports the door pillars and the roof. It supports the roof on two or three pillars depending on whether the car is a two door or a four door. Immediately after the hood (bonnet), the A-Pillar supports the hinges for the front doors and the windshield (windscreen).