GLOSSARY OF ENTRY DOOR TERMS
A [back to top]
On double doors, the hinged door leaf which is primarily operable.
For fire-rated doors, a label on a door product in which the manufacturer, not an independent laboratory, states that the door meets a type or types of test criteria.
Air passing through a door system when the door is under pressure, usually from wind.
Regular glass that has not been heat strengthened or tempered. Most window glass is annealed.
The post-type fitting on the latch-side edge of one of a set of double doors, which covers the margin between doors when they are closed, and which houses or contains the weatherstrip
B [back to top]
For locating a machined hole, recess or mortise, the distance from an edge or surface to the center or edge of the hole, recess or mortise.
A heavier-duty hinge than the standard hinge, with bearings supporting the pivots. Ball-bearing hinges are usually used for heavy doors that will be in commercial or industrial use. Provides smoother, quieter operation.
A term used for the rubber part at the bottom or top end of an astragal, which beds the astragal end and seals between the end and the door frame or sill.
Boss, Screw Boss
A feature of a part that enables the fastening of a screw into the feature, thereby allowing assembly of the part with another. Screw bosses are common features of molded plastic lite frames and extruded aluminum door sills.
In door and sidelite assemblies, a term used to differentiate door and sidelite units that are first framed as separate units, with heads and sills separate, and the width of the door or sidelite panels. Box-framed doors are joined to box-framed sidelites.
A small nail with a small head, usually used to fasten small trim and moldings.
A moulding, used to trim the outside edge of a door frame. Brickmould is most often applied to prehung units.
A term usually used in masonry construction to describe a door frame or a subframe in a masonry opening, around which a steel door frame wraps and is fastened.
A type of hinge commonly used to assemble doors. Butt hinges are often referred to as simply butts.
An organic compound, used in the door business as a sealant. It is naturally black and is heated and pumped through nozzles or pumped cold.
C [back to top]
Formed metal stripping, usually made of brass or zinc-plated steel, used between cut-glass pieces to assemble the pieces into a decorative glass panel. Caming is soldered at joints to bond the glass assembly together.
A spacer block used under a door sill to raise the sill an appropriate amount if carpet is used, so the door panel clears the carpet when opened.
A horizontal or vertical molding, which accents or trims edges of doors and windows to the surrounding walls. Casing also covers or accents intermediate posts.
Sealant that is usually extruded or troweled into a recess or joint, to seal against air and water leakage through the joint.
Provided with a facing or jacket, which works as a protection against weather and provides a finished appearance. Cladding may be painted metal, plastic, or a heavy coating applied by the manufacturer.
Rustic, decorative nail heads used primarily as an accent.
Natural wood door frames, without paint or primer applied, and which appears to be made of full-length pieces of stock, without joints or knots.
Sponge-like material, usually used in gaskets and weatherstripping, which compresses into joints, but absorbs little water.
An inside reinforcement, usually placed across the top edge of a door, to enable firm fastening of self-closing hardware to the door.
A complex material, such as wood or fiberglass, in which two or more structurally complementary substances combine to produce structural or functional properties not present in any individual component.
Continuous Head & Sill
A sill used for a type of door and sidelite unit in which the unit has full width top and bottom frame parts, and an internal post or posts separating sidelites from the door panel.
The center section or part of a door or door part.
Corner Plug, Corner Seal Pad
A small part, usually made of resilient material, used to seal water that gets beyond the bottom ends of weatherstrip in doors, from getting between the door edge and the jambs, adjacent to the bottom gasket.
A small molded wood lineal piece, usually formed with a scooped face, used to trim and fasten a panel of some type into a frame.
A large through-hole, near the edge of a door panel, usually 2-1/8 inch in diameter, which houses a cylinder lockset or deadbolt latch.
Cylinder Lock, Cylindrical Lock
Lock hardware which mounts into a door that has been prepared with a bored hole or holes through the face and into the edge.
D [back to top]
A machined or sawn groove across the width of a part.
A latch used to secure a door closed, the latch being driven from the door into a receiver in the jamb or frame.
Deflection: The distance a door has moved away from its closed and latched position, usually measured at the top unsupported latch-side corner. Deflection may be caused by wind pressure or heat. Deflection is temporary. The door returns to position when the force is removed.
Desiccant: Moisture-absorbing material used inside the spacer in an insulated glass assembly, so as to control moisture levels and prevent moisture from frosting or condensing on the inside glass surfaces of the insulated unit.
An assembly of frame and glass panel, which when fitted to a door in a formed or cut-out hole, creates a door with a glass opening.
Double-Glazed: Outfitted with two panes of glass with a sealed airspace between.
Drip Strip: In exterior doors, a fitting used across the outside face of the door adjacent to the bottom edge, to divert cascading rain away from the door bottom edge and away from the door/sill joint.
Drywall Opening: A rectangular opening in a wall, usually an interior wall, prepared to the size necessary to receive a prehung assembly.
DSB Glass: A term used in the glass business which means "Double Strength, 'B' quality."
Dummy Cylinder: A lock without a latch, typically used for the passive door panel of a double door unit, so that the hardware appears equal to that used on the active panel
E [back to top]
Edge Bore: The hole bored through the edge of a door to allow the latch to pass through, into the strike.
Electric Strike: A mechanism that allows a switch to open the latch of a door.
End Seal Pad: A closed-cell foam piece, about 1/16-inch thick, in the shape of a sill profile, fastened between the sill and the jamb to seal the joint.
Escutcheon: A stamped decorative plate, usually circular, to trim the shaft of a door knob or deadbolt latch, to trim the opening where the shaft or latch adjoins the face of a door.
Etched Glass: Glass used for doorlites on which a decorative pattern is engraved by means of chemical action or mechanical sandblasting.
Extension Unit: A framed fixed door panel, with a full-sized lite of glass, field-installed or shop-installed adjacent to a two-panel patio door, to make the door unit into a three-panel door..
F [back to top]
The plated or solid metal trim piece, usually about 1 × 2-1/4 inches, housed flush into the edge of a door, through which projects the latch of a passage lock or deadbolt.
Finger Joint: A way of joining short sections of board stock together, end to end to make longer stock. Door and frame parts are often made using finger-jointed pine stock.
Fire Door: A door of a construction type which has been tested to contain the spread of fire from one room or occupancy area to another. Fire doors are listed and labeled to show their ratings in terms of time, i.e., 20-minute, 90-minute, etc.
Flush-Glazed: A type of glazed door that has its glass perimeter moldings flush with or set down from the face of the surrounding door.
Foam: Rigid or flexible plastic, light in weight and cellular in structure, used in door construction. Rigid foam is used as the insulating and binding core for doors. Flexible foam is sometimes used as gasket.
A steel pin housed in a door bottom edge or astragal, with a latch mechanism, which can be driven down to project into a receiver socket or hole in the floor or threshold, to better secure the door when closed.
Frame: In door assemblies, the perimeter members at the top and sides, to which the door is hinged and latched. See jamb.
G [back to top]
Gain: A notch across the end of a board or wood part.
Galvanized: An adjective used to describe steel that has been zinc-coated. Galvanized steel is resistant to corrosion.
Gasket: A strip of flexible material which, in an assembly of parts, prevents air and water from penetrating or passing through joints between parts.
Glazing: The elastic material used to seal glass to a surrounding frame.
Grille: For doors with glasslites or inserts, a removable face-mounted assembly of thin wood or plastic pieces which, when in place, gives the lite or insert a patterned multipane look.
Grooved Glass: Glass that has been decorated with abrasively routed recesses. Grooving can give a single piece of glass a multipane look.
H [back to top]
Handing: A term that describes or determines the direction of swing of a door when opening.
Head Bolt: A steel pin housed in a door top edge or astragal. See foot bolt.
Head, Head Jamb: The horizontal top frame member of a door assembly.
Hinge: An assembly of metal plates and a cylindrical metal pin which, when fastened to a door edge and to a door frame, allow the door to swing or rotate in its frame.
Hinge Stile: The full-length vertical edge of a door, at the side or edge of the door which fastens to its frame with hinges.
Horned Sill: A sill that has been coped or cut in such a way at its ends, so that the sill projects across the outside face of the bottoms of door jambs, allowing the bottom ends of the brickmould pieces to butt and join to the top of the sill.
HVHZ: Abbreviation for high velocity hurricane zone.
I [back to top]
IG Unit: Abbreviation for insulated glass unit.
Inactive: A term for a door panel fixed in its frame. Inactive door panels are not hinged and are not operable.
Insulated Glass, Insulating Glass: A glass assembly of multiple full-lite pieces, separated by a perimeter spacer and sealed as a unit. Insulated glass in residential doors is usually made with two thicknesses of 1/8-inch glass, separated by an airspace up to 3/4-inch thick.
Inswing: A term used to describe an exterior entry door unit for which, when the hinged door panel is opened, the panel swings into the building.
K-Value (Thermal Conductivity) Laboratory-determined value of the thermal conductance of a material.
R-Value (Thermal Resistance) Ability of a material to retard the transmission of heat.
U-Factor (Heat Transmission Coefficient) Amount of heat, in BTU, transmitted through one square foot of material (the door) in one hour at a temperature difference of 1° Fahrenheit from one side to the other. The lower the U-value, the better the insulating material.