Glossary

Arrangement: Specific combination of doors, sidelites and transoms.  Also includes the door handing and swing.
Astragal:  T shaped wood moulding attached to the inactive door in a double door set.
Backset: The distance from the edge of a door to the center of the bore.
Bill of Lading: A written receipt given by a shipping company for goods (in our case doors) accepted for transportation.
Bore: The hole drilled in a door for a door knob or dead bolt.  A single bore allows for a door knob only. A double bore allows for a door knob and a dead bolt.
Brick Mould:  Exterior trim applied to the edge of the door jamb or door frame.
Casing: Interior trim applied to the edge of the door jamb covering the gap to the inside wall.
Divided Lites: The style of door or window that has multiple glass panes separated by bars or mouldings.
Door Frame:  The wood surrounding a door which the hinges attach to on either the left or the right side. Also known as the door jamb.
Handing: A door is either left or right handed.  This is determined by visualizing your back to the door hinges and if it opens to the right it is a right hand swing.  If it opens to the left it is a left hand swing.
Header: A board in a house wall framing that spans over the width of a door or window rough opening providing structural support.
Lite: Glass in a window or door.
Mullion Cover: Wood trim applied to cover the joint between door frame and side lite and/or transom frame.
Pre-Hang: Pre-assembling the arrangement of doors and sidelites in a frame (jamb) prior to installing in a wall.
Rail: Horizontal component of a door that attaches to both stiles.  Rails may top rails (top of the door), lock rails (near the door knob) or bottom rails (at the bottom).
Rough Opening: Opening framed into a house to allow for the installation of a pre-hung door unit.  The rough opening size is usually about 1/2 inch taller and 1/2 inch wider than the pre-hung unit.
Stile: Long vertical door component that runs the entire height on both the left and right side of the door.
Sub Floor: Typically plywood or oriented strain board (OSB) under the floor covering.
Swing: A door opening into the building is an in-swing. A door opening to the outside of a building is an out-swing.  See Handing above for defining right or left swing.
Transom: Window directly over a door. Typically the shape is square, elliptical or a half round.
Threshold: The sill of a doorway.