GLOSSARY OF ARCHITECTURAL HARDWARE TERMS

A

Abrasive

Hard granular material of varying fineness, used in grinding and/or polishing, or incorporated with metal to provide a non-slip surface

Active Door

(in a pair of doors) The leaf that opens first and the one to which the lock is applied

Addendum

Changes made to the specification

Alcove

A recessed space connected with, or at the side of, a large room

Alloy

The combination of two or more metal elements to achieve special strength, hardness or appearance characteristics

Anneal

To heat metal, glass or other materials above the critical or recrystallization temperature, then cool to eliminate the effects of colour working, relieve internal stresses or improve electrical, magnetic or other properties

Anodic Coating

(see Anodize)The surface finish resulting from anodizing

Anodize

To provide a non-corrosive oxide film on the surface of a metal, particularly aluminium, by electrochemical action

Anti-Friction Bearing

Bearing used in a hinge for the purpose of reducing friction and improving efficiency. Normally balls, oil-impregnated or other anti-friction material is used

Anti-Friction Latchbolt

The latchbolt of a lock that has been equipped with a device for lessening friction between bolt and strike. May be a small trigger attached to the bolt that contacts the strike and exerts a lever action to depress the bolt (three-piece latchbolt). May also be a latchbolt with some form of nylon insert or surface.

Approved Schedule

Schedule reviewed by the architect and stamped as approved

Arch

A curved structure that carries the weight over an opening

Architect

A person who plans buildings and oversees their construction

Architectural Finish Hardware

Functional hardware with a finished appearance. A part of the decorative treatment of the building and its rooms

Astragal

A member or combination of members applied to one or both doors of a pair at their meeting edges. The astragal closes the clearance gap for the purpose of either providing a weather seal, minimizing the passage of light between the doors or retarding the passage of smoke or flame during a fire

Auxiliary Deadlatch

A supplementary latch, which, when the door is closed, automatically deadlocks the latchbolt against end pressure. It does not interfere with the normal operation of the lock

Auxiliary Lock

A lock having a latchbolt or a deadbolt operated by a key or a turnsnib, or both. This lock often is used in addition to another lock, which may or may not be key operated, but which has a latchbolt operated by knobs or levers

B

Backcheck

Optional feature in hydraulic door closers, which takes effect at a certain degree of opening and controls the speed of the door during the balance of its opening cycle

Backfill

Earth replaced around a foundation

Backset (of a lock)

A term used in referring to the horizontal distance from the face of the lock to the centre line of the cylinder, key hole or knob hub

Balcony

A platform projecting from the wall of a building, above the ground

Ball-Bearing Hinge

A hinge equipped with ball bearings between the hinge knuckles to reduce friction

Barrel Key

A key with a round shank and wing bit. Used chiefly for cabinet locks. The shank has a hole in the end, which is inserted in the lock

Barrel

That portion of a hinge that is enlarged to receive the pin and act as the pivot point. It includes one or more knuckles from each individual leaf

Basement

The lowest story of a building partially or entirely below ground

Batten

A strip of board for use in fastening other boards together

Beam

A horizontal structural member that carries a load

Bearing Partition

A partition supporting any vertical load in addition to its own weight tumbling in a drum with small steel balls or by rubbing with hard metal pads

Benchmark

A reference point used by surveyors to establish lines and grades

Bit Key

A key with a solid cylinder shank, stem and wing bit the wing bit may be tapered, flat or curved
Bit keys are available in a variety of sizes

Bitting

A number that represents a depth of a cut on a pin tumbler-type key. A bitting is often expressed as a series of numbers and/or letters that designate all the cuts on a key

Blocking

Small, wood framing members

Bond

Mortar bond between mortar and masonry units; structural bond between wythes; pattern bond for decorative effect

Box Strike

A strike containing a housing in the back to enclose the bolt opening in the frame. May be a separate piece from the strike. Metal frames usually have a box already built into the strike area to protect it from mortar and cement

Bright Finish

A term used to describe builders' hardware that is polished and buffed to achieve a mirror- like finish

Buffing

The process of providing a lustrous finish by means of power-operated soft fabric wheels coated with a wax compound containing fine, abrasive particles

Builders' Hardware

All hardware used in building construction

Building Line

An imaginary line on a plot beyond which a building may not extend

Burnishing

The process of developing a smooth, lustrous surface on metal parts by

Butt Hinge (or Butt)

A hinge morticed into both the door and frame

Butt Weld

A weld of members butting against each other

Button-In-Knob

An inside knob with a built-in button that controls the locking and unlocking of the outside knob. May be either push button or turn button

C

Cabinet Locks

Includes a variety of applications such as school lockers, store display cases, panels, desk drawers, showcases, letter boxes, sliding doors, wardrobe doors, file cabinets, chests, luggage and trunks, metal boxes, cupboards and others

Caulking

A waterproof material used to seal cracks

Cam (of a cylinder)

A piece attached to the end of the cylinder plug. As the proper key turns the cylinder plug, the cam is rotated. This, in turn, moves the bolt or other locking mechanism

Canopy

A sheltering roof

Carbon Steel

An alloy of iron and carbon, with varying small proportions of other materials such as manganese silicon and copper

Case Harden

To produce a hard surface layer on steel by a process of heating, then cooling the metal

Case (of a lock)

The box containing the mechanism

Casement

A window whose frame is hinged at the side

Casing

The framing around a door or window

Cavity Wall

A masonry wall having an air space of about 50mm

Cement

A masonry material purchased in the form of a highly pulverized powder, usually medium grey in colour

Centre Pivot

(double acting) A special type of hanging device for heavy duty doors that usually swing both ways

Centre-to-Centre

Measurement from the centre of one member to the centre of another

Change Key

A key that operates an individual cylinder. Also called "individual key"

Channel

A standard form of structural rolled steel, consisting of three sides at right angles in channel form

Circuit

The path for an electric current

Clearance

A space intentionally provided between building parts, either to facilitate operation or installation, to insure proper separation, to accommodate dimensional variations or for other reasons

Cold Rolled

A term applied to metal sheet or plate that has been brought to final thickness and finish by being passed, unheated, between heavy rollers

Column

A vertical supporting member

Composite Wall

A masonry wall of at least two adjacent wythes of different materials

Compressive Strength

Resistance to a force ending to crush the material

Concealed Hinge

A hinge so constructed that no parts are exposed when the door is closed

Concrete

A masonry mixture of portland cement, sand, aggregate and water in proper proportions

Condensation

Water formed by warm, moist air contacting a cold surface

Conduit

A pipe or trough that carries electrical wiring, cables and so forth

Construction Key (CK)

A key normally used by building personnel for a temporary period during construction. It operates all key cylinders designated for its use. This key is permanently voided by the owner when he accepts the building or buildings from the contractor

Continuous Hinge

A hinge designed to extend for the length of the moving part to which it is applied. Also called "piano hinge"

Control Joint

A joint to divert cracking in a masonry wall. Formed by raking mortar from a continuous vertical joint.

Control Key

A key used to remove the removable core from a removable core cylinder/lock

Coordinator

A device used on a pair of doors to insure that the inactive leaf closes first, before the active leaf. Necessary when an overlapping astragal is present, with certain exit device combinations and when automatic or self-latching bolts are used. Both door leaves must have closers

Coping.

A masonry cap on top of a wall to protect it from water penetration

Core

The proportion of a mould used to form the hollow interior of a casting during the casting process

Corner Bracket

(Door Closer Bracket)A bracket that is connected to a door frame jamb and head at the upper hinge corner, to support an exposed overhead door closer

Cornice

The part of a roof that extends or projects beyond the wall; the architectural treatment thereof, as a "box cornice"

Corrosion

The deterioration of metal by chemical or electrochemical action resulting from exposure to weather, moisture, chemicals or other agents. A form of oxidation

Court

An open space surrounded partly or entirely by a building

Crawl Space

The space between the floor joists and the surface below when there is no basement. This is used to make repairs on plumbing and other utilities

Cremone Bolt

A device, of surface application, that by a turn of knob or lever handle, locks the door or the sash into the frame top and bottom

Cupola

A small structure built on top of a roof

Curtain Wall

An exterior wall that provides no structural support

Curved-Lip Strike

A strike with lip curved to conform to the detail of the door architrave

Cuts

An indentation or notch made in a key that enables it to turn. It may be either square or rounded. In tumbler locks, the cuts align the tumblers properly to allow the key to rotate In warded locks, the cuts clear the wards and allow the key to rotate.

Cylinder

The part of a lock that contains the tumbler mechanism and keyway. The cylinder will permit only the correct key to enter and turn, thus operating the locking mechanism

Cylinder, Mortice

A cylinder with a body and a cam. Normally used with mortice locks

Cylinder, Rim

Mounted through the door independently of the lock, usually by screws from the reverse side, and engaging the lock mechanism by means of a tailpiece

Cylinder Ring

A collar or washer that fits snugly around the head of a cylinder. It enhances the appearance of the installation, and in some cases, protects the cylinder from tampering

Cylindrical Lock

A type of key in knob lock. The locking mechanism is usually contained within a cylindrical case, and actuated by a cylinder and/or a button in the knob

D

Deadbolt

A lock bolt having no spring action, usually rectangular in shape, which is operated by a key or turnsnib. It is locked against end pressure when projected

Deadlock

One having a deadbolt only

Deadlocking Latchbolt

 

A spring-actuated latchbolt with a bevelled end and incorporating a plunger that, when depressed, automatically locks the projected latchbolt against return by end pressure

Dogging

Term used with exit devices. A mechanism that allows the latchbolt to remain in a retracted position thus permitting free push-pull operation of the door from either side

Door Holder

Used for fastening a door in selected open positions

Door Pull

A handle or grip, commonly mounted on a plate, designed for attachment to a door to facilitate opening and closing

Door Stop

A device to limit the opening swing of a door. Also, that part of a door frame against which the door closes

Double-Acting Door

A door equipped with hardware that permits it to swing to either side of the plane of its frame

Double-Acting Spring Hinge

A device for hanging a door, permitting the door to swing in either direction and return to a closed position

Double Egress

A pair of doors that are comprised of two single-acting doors swinging in opposite directions, both doors being of the same hand

Double-Hung Windows

A window having top and bottom sashes, each capable of movement up and down in its own grooves

Double Rebate Frame

A door frame having two rebates

Draughtsman

A man or woman who draws plans using draughting instruments

Drawing

The process of pulling metal in solid form through dies to alter its finish, mechanical properties or cross-sectional shape

Drip

A moulding designed to prevent rainwater from running down the face of a wall, or to protect the bottom of a door or window from leakage

Drivers (or Top Pins)

The upper set of pins in a pin tumbler cylinder, which when activated by springs, projects into the plug until raised by insertion of the key to the proper shear line for operation

Dry Wall

A wall finished with wallboard in place of plaster; stone wall built without mortar

Duct

Sheet-metal conductor for air distribution

Ductile

A term used to describe metals soft enough to be stretched, drawn or hammered without breaking

Dummy Cylinder

One without operating mechanism, for use where effect is desired

Dummy Trim

Trim only, without lock. Usually used on the inactive door of a pair of doors to give balance

E

Eave

The lower portion of a roof that extends beyond the wall

Edge Plate

An angle- or channel-shaped guard used to protect the edge of a door

Electric Strike

An electrical device that replaces a regular lock strike and allows opening of the door from a remote location or by special access equipment

Electrogalvanizing

The coating of ferrous metal with zinc by an electric plating process

Electroplating

The coating of metal by the action of an electric current passing through a chemical compound solution

Element

Any number of basic substances (i.e. iron, copper, zinc and nickel) whose characteristics are determined by the structure of their atoms

Elevation

An orthographic projection of the vertical side of a building

Embossed

Having a raised and/or indented pattern impressed on a surface by means of patterned rolls or stamping dies

Escutcheon

An elongated plate, either protective or ornamental

Etch

To produce a textured finish on metal or glass by the corrosive action of an acid

Excavation

A hole formed by removing earth

Exit Device

A door locking device designed to grant instant exit from an area, by pressing on a crossbar, which releases the locking bolt or latch

Extension Bolt

A flush bolt in which the connection between bolt head and operating mechanism is by means of a rod inserted through a hole bored in the thickness of the door

Extrusion

The process of producing metal shapes by forcing heated metal through an orifice in a die by means of a pressure ram; any item made by this process

F

Facade

The front or face of a building

Face (of a Lock)

That part of a lock visible in the edge of a door after installation

Facing

Any material forming a part of a wall used as a finished surface

Fatigue

Structural failure of a material caused by repeated application of stresses

Ferrous

A term applied to materials containing iron

Ferrous Metal

A metal containing or derived from iron

Fibreboard

Sheet material of refined wood fibres

Fibreglass

A material composed of thin glass threads used for insulation or with resin for a finished surface

Filigree

Fine, decorative openwork

Finish Hardware

See Architectural Finish Hardware

Fireproofing

Any material protecting structural members to increase their fire resistance

Fire Wall

A wall extending from foundation through the roof to subdivide a building in order to restrict the spread of fire

Fixed Pin Butt (Hinge)

A hinge in which the pin is fastened permanently in place, preventing separation of the two leaves

Flashing

The sheet metal work used to prevent leakage over windows and doors, around chimneys, and at the intersection of different wall surfaces and roof planes

Flat Key

A thin, flat, stamped key, usually steel and usually having square-cut bitting on one or both sides

Flat Key Locker Lock

Used to lock metal storage lockers in factories, schools or similar facilities

Flat Lip Strike

A strike with a flat (non-curved) lip

Floor Clearance

The size of the space between the bottom of a door and the finished floor

Floor Closer

A door closing device that is installed in a recess in the floor below the door in order to regulate and control the opening and closing of the door

Floor Plan

An orthographic projection of the floor of a building

Flue

A passage in the chimney to convey smoke to the outer air

Flush Bolt

A door bolt so designed that when installed it is flush with the face or edge of the door

Foot Bolt

A bolt designed for attachment to the bottom of a door. Release of the trigger permits the spring to move the bolt into the locking position. Usually the bolt is controlled by a trigger, which holds the bolt against a spring

Footing

The bases upon which the foundation and posts rest

Forging

Shaping metal by impact or pressure. May be heated prior to shaping

Formica

The trade name for a plastic veneer

Foundation

The supporting wall of a building below the first floor level

Framing

Timber used for the structural framing of a building

French Door

A door with glass panes throughout its length, usually with narrow stiles

Furring

Wood strips fastened to a wall or ceiling for the purpose of attaching wallboards or ceiling tiles

G

Gable

The triangular portion of an end wall formed by a sloping roof

Galvanizing

The process of coating metal with zinc, either by dipping in a bath of molten zinc or by electrolytic action

Gauge

A number indicating the thickness of materials

Grand Master Key (GM K)

A key that operates all of a large group of locks, which contain two or more master key groups

Grout

Mortar of pouring consistency

Gutter

A trough or depression for carrying off water

Gypsum Board

Board made of plaster with a covering of paper (also called "plasterboard")

H

Hand

The term used to indicate the direction a door swings

Handed Hardware

Locks, closers and other hardware, limited to use with doors that swing in a given direction

Hardboard

Sheet material of compressed fibres

Hardness

The measure of the resistance of a material to indentation, wear or abrasion

Hardware Sets

A group of hardware listed in the specification, for a specific opening

Hardwood

Wood from trees having broad leaves in contrast to needles. The term does not necessarily refer to the hardness of the wood

Headroom

The vertical clearance in a room or on a stairway

Hinge

Two jointed plates hinged together and attached to a door and its frame. Serves to support or "hang" the door and allows the door to swing or move

Hinge Backset

Distance from back end of hinge to edge of inside door surface

Hinge Jamb

Vertical member of a door frame to which the hinges are applied

Hinge Stile (of a door)

The door stile to which the hinges are applied

Hinge Types

Classified according to installation method:

Full Mortice. Hinge with one leaf morticed in the edge of the door, the other leaf morticed in the door jamb

Non-Mortice. Hinge which has both leaves' surface fixed onto the door and the jamb

Hip Roof

A roof with four sloping sides

Holdback

A catch or other device on a lock which can hold the latchbolt in the retracted position

Hot Rolled

Shaping a heated form of metal between rollers

Hot Working

The process of forming a metal at extremely high temperature

Hotel Lock

A lock having special locking and access characteristics, especially designed for use in a hotel/motel

Hub (or Follower)

The part of a lock through which a spindle passes (either knob or turnsnib) to activate the mechanism

I

Inactive Door

That leaf of a pair of doors that is bolted when closed and to which the lock strike is fastened to receive the latch of the active door

Indicator

A device, usually an inward- or outward-moving button, used in connection with hotel locks to indicate whether room is occupied

Inset

The distance from the face of the door to the face of the jamb

Insulation

Material for obstructing passage of sound, heat or cold from one surface to another

Interlocking Joint

A joint formed between sheet metal parts by engaging their edges, which have been pre-formed to provide a continuous splice

J

Jalousie

A type of window consisting of a number of long, thin, hinged panels

Jamb

The vertical member forming the side of a door, window or wall opening frame. The hinge jamb is the Iamb at which the hinges or pivots are installed. The strike jamb is the jamb in which a strike may be installed and away from which the door or window swings. A blank jamb is one that has not been prepared to receive hardware

Jamb Depth

The width of a jamb, measured perpendicular to the door or wall face at the edge of the opening

K

Keeper

Same as Strike

Key Change

The bitting of a key to operate the lock for which it is intended

Key Change Number

The recorded code or bitting number indicating the key change, usually stamped on key

Keyed Alike (KA)

A group of locks in which each is operated by the same change key

Keying Schedule

A complete listing and explanation of all keys and keying requirements

Key-in-the-Knob

A door knob with built-in cylinder for locking and unlocking with a key

Key Section

The cross-sectional shape or configuration applied lengthwise to a key blade that may restrict its insertion into the lock mechanism through the keyway. Each key section is usually assigned a designation or code by the manufacturer. (This is usually shown as a cross-section view from the bow toward the tip of the key)

Keyway

The shape or configuration of the hole in the lock mechanism that allows only a key with the proper key section to enter

Kick Plate

A protective plate applied on the lower rail of the door to protect against the door being marred

Knob

That portion of the lock protruding from the door, it is grasped and turned for entry

Knob Shank

The projecting stem of a knob into which the spindle is fastened

Knuckle

The enlarged part of a hinge into which the pin is inserted

L

Labelled Door (or Frame)

A door or frame that conforms to all the applicable requirements - in respect to fire resistance - of a nationally recognized testing authority and bears a label designating that fire rating

Laminate

The process of, or a product made by, bonding together two or more layers of material or materials

Landing

A stair platform

Latch bolt

A lock component having a bevelled end that projects from the lock front but may be forced back into the lock case by end pressure or drawn back by action of the lock mechanism. When the door is closed, the latchbolt projects into a hole provided in the strike, holding the door in a closed position

Latch Retractor

In a cylindrical lock, the device that is activated by the spindle, and in turn, retracts the latchbolt

Latch Unit

That portion of a cylindrical lock that fits into the edge of the door housing the latchbolt and latch. In a tubular lock, it also contains the retracting mechanism

Lateral Movement

Movement toward the side, sideways

Lattice

Openwork made by crossed or interlaced strips of material

Lead-Lined

A door, frame or lock designed for use in hospitals or other areas where there is a potential radiation hazard. The door or frame is lined with sheet lead. The lock is sheathed or lined with lead.

Leaf (of a hinge or butt)

One of the two movable plates which, when fastened together by the hinge pin, form a complete hinge

Leaf (of a pair of doors)

One of the two doors forming a pair or a double door

Lever Handle

A horizontal handle on a lockset or auxiliary lock

Lift Off Hinge

A hinge having only two knuckles, to one of which the pin is fastened permanently, the other containing the pinhole, whereby the two parts of the hinge can easily be separated. These hinges are handed

Lip of Strike

The projecting part on which the latchbolt rides. It may be either a curved lip or flat lip

Lock Rail (of a door)

The horizontal member of a door that receives the locking mechanism

Lockset

A complete lock or latch assembly, includes the lock or latch mechanism and trim (knobs, levers, handles, roses and escutcheons)

Lock Stile (of a door)

The vertical member of a door to which the lock is applied, as distinguished from the hinge stile

Loose Pin Hinge

A hinge having a removable pin to permit the two leaves of the hinge to be separated

Louvre

A ventilating window covered by sloping slats to exclude rain

Lubricity

Possessing an inherent lubrication

M

Magnetic Catch

A cupboard catch that uses a magnetized strike to hold the door closed

Malleable

A term used to describe metals that can be hammered, pounded or pressed into various shapes

Masonite

A hardboard trade name

Master Key (M K)

A key with bitting arranged to operate two or more locks of different changes in a group, each lock also being operated by its own individual key

Mastic

A waterproof material used to seal cracks

Meeting Stile

The vertical edge of a door or window, in a pair, which is adjacent to the other door or window

Metallurgy

The science or technology of metals

Module

A standardized unit of measurement

Mortice

An opening, recess or cutout made to receive a lock or other hardware. Also the act of making such an opening

Mortice Lock.

A lock designed to be recessed into the edge of a door, rather than being mounted to its surface

Mould

A form into which molten metal is poured to produce a casting

Moulding

Strips used for ornamentation

Mullion

A fixed or movable vertical member dividing a door opening

Muntin

The small members that divide the glass in a window frame

N

Niche

A small recess in the wall

Nightlatch

A lock with a spring activated latchbolt

Non-Ferrous

Metals that do not contain iron

Nosing

The rounded edge of a stair tread

O

Offset Pivot

A special hanging device for heavy-duty doors, used on doors swinging one way only

Olive Knuckle Hinge

A hinge with an oval-shaped single knuckle

Opening Size

The size of a door frame opening, measured horizontally between Iamb rebates and vertically between the head rebate and the finished floor. The opening size is usually the nominal size and is equal to the actual door size plus clearances

Organic Coating

A coating such as paint, lacquer, enamel or film in which the principal ingredients are derived from animal or vegetable matter or from some compound of carbon

Overhang

The horizontal distance that a roof projects beyond a wall

Oxidation

The natural tendency of compounds to break down and return to their basic, original forms. This characteristic is both beneficial and detrimental in builders' hardware. Rust and corrosion are detrimental, destructive forms of oxidation. On the other hand, a finish that darkens with use, i.e. oxidized bronze or copper's "patina" are examples of attractive, essentially non destructive forms of oxidation

P

Panic Hardware

See Exit Device

Padlock

A small, portable lock consisting of a case containing a lock mechanism, a shackle or U-shaped bar that fastens into the lock case, and usually a key to open the locking mechanism

Panel

A flat wood, metal or glass surface framed in either wood or metal

Parapet

The portion of a wall extended above the roof

Particleboard

Wood fibreboard

Passage Set

A term commonly used to describe a latchset with handles on both sides of a door but no locking function

Patina

A film on bronze or copper formed by oxidation verdigris

Patio Lock

A lock designed with a push button or turn button inside to lock the outside handle. When so locked, there is no entrance by key from outside

Paumelle Hinge

A style of hinge using a single, pivot-type knuckle. Generally modern, or streamlined design

Physical Properties

Those properties of a material such as specific gravity or density, electrical and thermal conductivities, and coefficient of thermal expansion, which serve to characterize and distinguish between different materials

Piano Hinge

See Continuous Hinge

Picking

Manipulation of the tumblers or bypassing the wards in a lock mechanism, without a key, permitting the mechanism to be unlocked

Pickling

The treatment of metal surfaces with a strong oxidizing agent such as nitric acid, to make them chemically clean and provide a strong, inert oxide film

Pin Tumblers

Small sliding pins in a lock cylinder working against coil springs and preventing the cylinder plug from rotating until aligned by the bitting of the correct key

Pitch

A term applied to the amount of a roof slope

Pitting

Localized surface defects on metals, in the form of small depressions, or "pits"

Plain-Bearing

A standard hinge without ball, oil-impregnated or anti-friction bearings

Plug (of a lock cylinder)

The round part containing the keyway and rotated by the key to transmit motion to the bolt, or other locking mechanism

Plumb

Vertical

Ply

The number of layers of roofing felt, plywood veneer or other materials

Plywood

Wood made up of three or more layers of veneer bonded with glue

Privacy Set

A term for locks used on bathroom and bedroom doors having an inside button or turnsnib to lock the outside handle and usually an emergency function which will unlock the set from the outside

Punching

The process of forcing a punch through metal into a die, forming an opening

Push Plate

A plate placed on the surface of a door to protect it from wear and soiling, as a result of persons pushing the door open

Q

Quenching

The process of cooling heated metal by contact with a liquid, gas or solid, for purposes of hardening or tempering doors vertically within a door frame. Required for the normal operation of doors but designed to permit its temporary removal so the entire width of the opening can be utilized

R

Rafter

A member in a roof framework running from the eaves in the ridge. There are hip rafters, jack rafters and valley rafters

Rail

A full-thickness, horizontal structural member forming the top or bottom edge of a door or sash. May be located at an intermediate height in a door, separating panels or glazed areas

Rebate

A term used to define that portion of a door frame into which the door fits. Also a term used to describe the abutting edges of a pair of doors or windows so shaped as to provide a tight fit. One half of the edge projects beyond the beyond half, usually l3mm

Rebated Lock (or Latch)

A lock whose front conforms to the rebate on the edge of the door

Removable Core Cylinder

A cylinder containing an easily removable core assembly, which incorporates the entire tumbler mechanism including the plug, tumblers and separate shell. The cores normally are removable and interchangeable by use of a special key (called a "control key")

Return

A moulding turned back to the wail on which it is located

Removable Mullion

A mullion separating

Reveal (of a door frame)

That part of a back bend that projects out from the finished wall. Also, the dimension from the inside face of the door to the face of the frame at the side opposite from the direction of the door swing

Reversible Lock

A lock with components that can be readily adapted to enable the lock to suit doors of either hand, opening in or out

Rib

A raised ridge or fold formed in sheet metal to provide stiffness

Rim

A term indicating articles of hardware designed for application to the surface of the door or frame

Rim Cylinder

See Cylinder

Riser

The vertical board of a step. It forms the front of the stair step

S

Sash

A framing for windowpanes. A sash window is generally understood to be a double hung, vertically sliding window

Satin Finish

Builders' hardware that has been scoured with an abrasive to achieve a dull lustre

Schedule

A list of parts or components (such as a hardware schedule)

Scheduling

The detailing of openings or doors, listing their locations and the door and frame materials, and the listing of hardware in detail

Scheduling Sequence

A proper and orderly listing of various hardware items for each door

Scouring

The application of a fine abrasive to achieve a satin, or dull, finish. The abrasive may be applied by hand, wheel or belt

Section

An orthographic projection that has been cut apart to show interior features

Shank (of a knob)

The projecting stem of a knob into which the spindle is fastened

Shear Line

The interface between the plug and shell in a cylinder that is normally obstructed by the pin tumblers. The pins must be raised to the shear line by the correct key to allow the plug/ key to turn

Shutter Hinge

A hinge designed to swing shutters

Sidelight

A narrow window adjacent to a door

Silencer

A small piece of resilient material attached to the stop on a door frame to cushion the closing of the door

Sill

The stone or wood member across the bottom of a door or window opening. Also the bottom member on which a building frame rests (sill plate)

Single-Acting Door

A door mounted to swing to only one side of the plane of its frame

Single-Rebate Frame

A door frame having only one rebate

Sintering

The solidification and fusing of compressed powdered metal

Sliding Door Pull

A pull that is either flush with the edge of the door or with the face of a sliding door

Soffit

The under surface of the stop at the frame head. That portion of a door frame between the rebates on a double-rebated frame or between the rebate and the outer edge of the frame on the stop side of a single-rebated frame. Sometimes referred to as the "stop width"

Span

The distance between structural supports (i.e. the length of a joist, rafter or other member)

Spinning

Process for shaping sheet metal. During the process a tool is pressed against the metal as it revolves

Specifications

A written document that accompanies the working drawings, which sets forth standards for the materials used in the construction of buildings. It also covers all conditions relating to that construction: labour, estimating, purchasing, payment, etc

Spindle (of a knob)

The bar connecting the knobs or levers and passing through the hub of the lock for the purpose of transmitting the knob lever action to the latchbolt

Split Spindle

A spindle having a joint midway in its length to permit the knob at one end to be made rigid by the stop work, which the other end is free to operate

Spraying

The process of coating materials with paint or clear lacquer by use of air pressure

Spring Hinge

A hinge containing one or more springs to move the door into a closed position. It may be either single- or double-acting

Stile

The vertical members of a door to which the lock and hinges are applied

Strap Hinge

A surface hinge of which both leaves are of considerable length

Strike

A metal plate or box that is pierced or recessed to receive the bolt or latch of a lock. Sometimes called a "keeper"

Stud

The vertical member that forms the framework of a partition or wall

Surface Bolt

A rod or bolt mounted on the face of the inactive door of a pair to lock it to the frame and/or sill; operated manually

Surface Hinge

One having both leaves Se-cured to the surface of the door and frame

Swaging

A slight offset of the hinge leaves at the barrel, which permits the leaves to come closer together

Swing

The direction of opening of a swinging door. Synonymous with the "hand of a door"

T

Tailpiece

The connecting link attached to the end of a rim cylinder, which transmits the rotary motion of the key through the door, into the locking mechanism

Takeoff

The listing of openings and the appropriate hardware from a set of floor plans and door schedule

Tempering

The process of heating metal, glass or other material to a temperature below the transformation stage, then cooling it at a controlled rate to change its hardness, strength, tough-ness or other property

Tensile Strength

Resistance to a force tending to tear the material apart

Terrazzo

Floor covering of marble chips and cement ground to a smooth finish. Metal strips are used to separate different colours and create designs

Thermal Stress

Stress within a material caused by temperature variations

T hinge

A surface hinge with the short member attached to the jamb and the long member attached to the door

Threshold

A strip fastened to the floor beneath a door. May be required to cover the joint of two types of floor materials where they meet

Throw

The distance that a deadbolt or latchbolt projects when in the locked position

Translucent

Having the ability to transmit light but not a clear image

Transom

A small window over a door

Transom Closer

A closer concealed in the frame header with an arm connecting to the door at the top rail

Transparent

Having the ability to transmit clear images

Tread

The horizontal part of a step

Tubular Lockset

A lockset made up of three components: outside knob, rose and spindle assembly; latch unit with retracting mechanism; and inside knob and rose assembly

Turnsnib

A small snib usually crescent or oval shaped, with spindle attached, for operating the deadbolt of a mortice lock

U

Utility Lock

Also called "cam locks". Used for a variety of locking purposes. They are identified by the flat metal piece extending from the lock barrel, which is the cam

V

Veneer

A facing material not load-bearing

Vestibule

A small lobby or entrance room

W

Wainscot

An ornamental covering of walls, often consisting of wood panels, usually running only part way up the wall

Wall

An exterior wall (a partition is an interior wall)

Warded Key

One having cuts (grooves and/or notches) designed to clear corresponding wards or projections in the lock case or key hole

Weatherstrip

Narrow strips made of metal, or other material, designed so that when installed at doors or windows it will retard the passage of air, moisture or dust around the door or window sash

Working Drawing

A drawing containing information for the workers
X
Y
Z

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