Active Door: The leaf in a pair of doors which the lock is applied too and which is the first to open.
Adjustable Threshold: A threshold that may be adjusted up or down in order to customize a doors seal for different types of weather or humidity.
Astragal: A series of components that closes the gap between a pair of doors. Used to provide a weather seal, minimize light passing between the pair or slow the progress of fire. Components may overlap or meet along the centerline.
Backset: A measure of the horizontal distance from a lock face to the center of the keyhole or cylinder. Measured from the center of the lock edge for a beveled front, and from the lower step of the lock face for a rabbeted front.
Bevel of Door: The angle of a door’s edge to the outer surface of its stile. The typical bevel is 3 degrees.
Beveled Glass: Glass which has had the edge of one face ground down at an angle along the perimeter in order to create a better fit. Typically used only on thick glass.
Bored Lock: A tubular or cylindrical lock placed into a door via a bored opening.
Casing: A decorative wood paneling attached to the interior edge of a window or door frame. Covers the gap where the door frame meets the wall.
Cylinder: Contains the tumbler and keyhole of a lock. This is the part of the lock into which the key is fit.
Door Stop: The part of the frame upon which the door rests when closed. Limits the door’s swing.
Double-Acting Door: Door which is hinged in such a way that it may be swung open both inward and outward.
Dutch Door: A door with both a top leaf and a bottom leaf that can be attached by a bolt to serve as a single door or unbolted so that the top leaf may be opened independently.
Dutch Door Bolt: The bolt used to lock in the bottom leaf of a Dutch door with the top leaf.
Extension Bolt: A flush bolt connected to the operating mechanism via a rod piercing the doors thickness through a bored hole.
Floor Clearance: A measure of the space between the floor and the bottom of the door.
Flush Bolt: A bolt that is flush with the face or edge of the door when retracted. Keeps an inactive door stationary.
Frame: The surrounding edge of the door to which the door is attached. It Includes the head, sill and jambs of the door.
French Door: A door whose panel consists of glass panes throughout its length surrounded by narrow stiles.
Glazing: Glass set in frames
Hand: Which direction the door opens. When looking at a door from the outside, it is a right hand door when the handle is on the left; it is a left hand door when the handle is on the right. This is reversed if the door swings out. Click here for an illustration.
Head: The horizontal piece of wood that tops the door frame.
Hinges: The plates and pins used to attach the door to the frame, allows the door to swing inward or out.
Inactive Door: The leaf in a pair of doors which receives the bolt.
Insulated Glass: Two pieces of glass spaced apart by a metal strip and sealed with rubber to create a more weatherproofed joint.
Jamb: The vertical component of a door frame. Different types include the hinge jamb, upon which the hinges are attached, the strike jamb, upon which the strike is installed, and a blank jamb, which is not prepared for either a hinge or a strike plate.
Jamb Depth: A measure of the depth or width of the jamb, perpendicular to the door when closed.
Lock Rail: Horizontal member of a door located where the locking mechanism would be installed.
Lockset: The complete lock system.
Mortise Lock: A lock which is placed in a precut slot inside the door’s edge.
Mortise & Tenon Construction: A way of locking two wood pieces together to form a tighter bond.
Mull Cover: A mold which covers the sidelite and door frame joint and/or a mull post.
Mull Post: The post set in the gap between the door and sidelite frames.
Mullion: The vertical jambs dividing a door and side lite.
Multi-Point Locking System: Multiple locking points located in various places on the door and frame.
Muntin: Small pieces which separate the glass from the window frame in a divided light or grille multi lite door.
Overhang: How far the roof extends past a wall.
Panel: A material placed inside the stiles and rails held in by sticking or molding.
Pre-Hung: A full unit with the door hinged and an assembled jamb, frame, and sill.
Rabbet: A cut or groove along the edge of a piece of wood that allows another piece to fit into it to form a joint. Typically a jamb is rabbeted as a door stop.
Rail: The horizontal wood pieces of a door.
Rough Opening: The size of the actual hole in the wall where the door and jamb will be installed. A measure from the first vertical stud to next for the width, and from the floor to the first horizontal stud (ie top to bottom) for the height. The size of the Rough Opening is generally at least ˝” larger than the size of the door jamb/frame to be installed.
Sidelite: The side panels beside a door, typically filled with glass for decoration or to allow more light.
Shop Prime: The coating applied before a coat of paint. Applied in shop.
Specifications: A document describing the materials and standards used for a construction project.
Stiles: The two outer vertical wood pieces of a door.
Subsill: The member below the threshold. Often will have a slope to drain water away from the door.
Swing-in: A door which opens inwards towards the house.
Swing-out: A door which opens out from the house.
Tempered Glass: Glass that has been heated and cooled so that it shatters into small pieces when broken. Also called safety glass.
Threshold: The bottom of the door frame; the piece which is stepped over.
Transom: A piece of decorative glass accompanied by a frame placed atop the doorway.
Trim: A strip placed over the face of a doorjamb for decorative purposes.
Triple Glaze: A decorated piece of glass between two clear pieces of clear glass.
Weather-strip: The flexible strips surrounding the door designed to slow airflow and reduce moisture when the door is closed. Should create a near weather-proof seal.