What are the various parts of a door, and are they universal to all types?
Different types of doors have different components, but some nomenclature applies to virtually all types. A typical door contains a top and bottom rail as well as stiles. The top and bottom rail are the main horizontal structural members and the stiles are the vertical structural members. They also usually have a lock rail somewhere near the midpoint (unless they are solid, in which case no lock rail is needed). The lock rail allows the lockset (lock and knob or handle) to be installed in a solid portion of the door.
