Several types of door used vehicle built

 Doors
Several types of door are used on each vehicle built,although the construction of the various doors is similar regardless of the location of the door on the vehicle,as indicated on Figure 1.47.
The door is composed of two main panels,an outer and an inner panel,both being of all-steel construction. The door derives most of its strength from the inner panel since this is constructed mainly to act as a frame for the door. The outer panel flanges over the inner panel around all itsedges to form a single unit,which is then spot welded or,in some cases,bonded with adhesives to the frame.
The inner panel has holes or apertures for the attachment of door trim. The trim consists of the window regulator assembly and the door locking mechanism. These assemblies are installed through the large apertures in the middle of the inner panel. Most of the thickness of the door is due to the depth of the inner panel which is necessary to accommodate the door catch and window mechanism. The inner panel forms the lock pillar and also the hinge pillar section of the door. Small reinforcement angles are usually used between the outer and inner panel,both where the lock is inserted through the door and where the hinges are attached to the door. The outer panel is either pro- vided with an opening through which the outside door handle protrudes,or is recessed to give a more streamlined effect and so to create better aerodynamics.
The upper portion of the door has a large opening which is closed by glass. The glass is held rigidly by the window regulator assembly,and when raised it slides in a channel in the opening between the outer and inner panels in the upper portion of the door. When fully closed the window seats tightly in this channel,effectively sealing out the weather.