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Garage Door Terminology


A type of support that’s used to secure torsion spring assemblies of vertical doors above the opening on the wall.

Adjustable clip – 3 Hole

The 3 hole adjustable clip is also known as a lansing bracket. This bracket is used on extension spring doors and helps to adjust the cable length of the garage door. An adjustable clip is also compatible with the S hook.

Adjustable Cone

Also known as the winding cone this part allows for the tension and winding of the torsion spring as it fits right into the spring.

Adjustable Sleeve

This is what permits the winding and tension of the torsion spring and it is secured right into the spring itself. It can also be called the winding plug or winding cone as well.

Adjusting Spring Cone

Also known as the winding plug or adjustable cone this part allows for the torsion springs ending and tension.

Aero Cable

This part is also referred to as an aircraft-type cable and it is several strands braided together of galvanized wire rope.

Air Infiltration

When air leaks or escapes from a garage door system.

Anchor Cone

This allows the spring to be secured to the center bracket and is placed into the end of the torsion spring.

Anchoring Plates

An anchoring plate is an “L” shaped bracket that is sometimes welded to the tracks to prevent adjustments. This bracket secures the garage door track to the wall to keep it secure.

Angle Brace

This lateral brace is attached to the back hang and the ceiling or roof.

Angle Iron

This L-shaped steel material is used to brace the rear of the horizontal tracks to the ceiling or roof construction.

Automatic Garage Door Lock

A locking device that is automatic and is sometimes also known as an automatic latch.

Automatic Latch

A device that is used to automatically lock the garage door.

Automatic Opening Device

A mechanism that is used on the installation that requires rapid door opening without an electric operator.

Back Hang

A hanger that is made from angle iron that attaches from the ceiling to the horizontal tracks of the door.


The distance measured into a building horizontally from the door mount to where the first obstruction is.

Ball Bearing Drum

To make heavier doors run smoother use this counterbalance drum with a ball bearing in it.

Battery Backup System

This is the system that kicks in to operate the garage door when the battery fails to work.


This is the piece of metal, rubber or vinyl that is around the edge of the window panes and secures it in place.

Blind Rivet

This is a fastening device that will mechanically join materials by using a riveting tool.

Booster Spring

This additional extension spring is used to provide for a weekend counterbalance.

Bottom Brackets (Corner/Fixture)

Mainly located on the bottom this a support bracket that holds the track rollers and could offer attachment of the lifting cables. These brackets can also be found in other locations as well and not just the bottom.

Bottom Rail

This piece is the lowest rail on a horizontal door section.

Bottom Weatherseal

The weatherstrip that is attached to the bottom of a garage door to seal between the door and the floor.


When the bottom rail of a wooden garage door is not straight or level. It is often characterized by a “smiling” door in which the corners of it are curled up.

Bracket Mounted (Track/Rivet)

The method in which to fasten the vertical track to the jamb with the use of brackets.

Broken Cable Device

A fixture at the bottom of the door that is used to prevent the garage door from falling in case the cable breaks.

C – Strut

A support that will reduce the deflection of door sections in horizontal positions. This strut also helps to increase the capability of the wind load on a garage door.

C-Shaped Bumper

Spring bumpers put at the ends of vertical tracks and prevents the door from coming out of its tracks if lifted too high.


The heat rate that flows through the insulation when there’s a difference in temperature from the outer to inner surface.


A braided band made of several strands of galvanized wire rope also known as Aircraft-Type Cable.

Cable Clamp

A device that is used to secure two pieces of cable to one another.

Cable Drum

A grooved and fitted drum placed onto the shaft of the torsion spring on which the lifting cable is wound onto.

Cable Length

The proper amount of cable that is required to operate the garage door properly.

Cable Safety Device

A part placed on the bottom which is designed to stop or slow the lowering of a garage door if the cable were to break.

Cable Stop

A device placed at the end of the cable that will prevent the cable from slipping through the drum.

Cable Stopping Device

A fixture placed at the bottom to prevent the door from falling if the cable were to ever break.

Center Bearing Bracket and Plate

A plate or bracket that is used to house the shaft bearing, anchor the torsion springs to the header. It is also used to align and support the counterbalance mechanism to the to the torsion shaft.

Center Hinge

A hinge that allows sections of the door to pivot while opening generally located on the intermediate stiles. It is also used between the bottom and intermediate sections as an edge hinge.

Center Lift Cable

This additional assembly is secured to the outside of the garage door near the center of the door. It also provides extra support for wide and heavy doors.

Center Plates

Used to support the shaft in the middle of the door and depending on the width of the door there may be more than one.

Center Post

The vertical post that is placed in between 2 single garage doors that is used to combat high force winds.

Center Stile

A part of the door section that is vertical and location and structure in which the center hinge will be attached.

Center Track

The added track that helps to give support to prevent the sagging of an open or horizontal door. This track is more often used with wide or heavy doors.

Chain Blocks

Used with manually operated doors and can be installed on either side of your door and are secured to the shaft. These blocks are highly recommended for doors 10 feet or taller to help them operate smoothly.

Chain for Jackshaft Operator

This is the chain that connects from the door to the jackshaft operator which is what opens the door.

Chain Hoist

A mechanical device that uses a hand chain to open and close the garage door.

Chain Tensioner

This part is used to properly tension the drive train between the operator shaft and the door shaft.

Channel Truss

A support that reduces reflection of door sections in the horizontal position. It also helps to increase the doors wind load capability.


Also known as a night latch this square shaft piece connects the outside handle to the inside lock.

Clear Rail

A rail without finger joints that is made with one continuous piece of lumber.


The amount of room needed on the side, head and back to properly install a sectional garage door.

Clevis/Clevis Pin

This pin is used to hold the counterbalance cable to the bottom bracket or the operator arm to the operator bracket. This pin is held in place with a cotter pin.

Coaxial Radio Receiver

This insures that the door(s) work with the same transmitters as indicated by the specifications.

Commercial Door

This type of door is used a vehicular entrance on commercial buildings like loading docs, service stations, parking garages, etc.

Commercial Hardware

This is hardware that is used for commercial and industrial type doors as they are stronger and sturdier.


Balancing out with a weight of equal force or weight.

Counterweight System

Counteracts the weight of the garage door that will let a reduced force to open and close the door.


Used on commercial and industrial doors these parts are used to connect the two shafts that support the torsion springs. There may be several of these parts depending on the width of the garage door.


The cylinder is what contains the locking pins and accepts the key in a key operated locking mechanism.


Direct current (DC) garage door opener motors convert alternating current (AC) into DC power and are typically smaller and quieter than AC motors.

Dead Coils

Coils that are made inactive by the spring plugs.

Dead in the Head

A lack of counterbalancing in the open position that prevents the door from fully opening.

Dead Load

A permanent static load that remains constant over time. It is usually the weight of the door.


The decal attached to your garage door contains information regarding the garage door system.

Decorative Hardware

Hardware pieces that give a garage door an extra flair and help it stand out from other garage doors in the neighborhood.

Design Wind Load

A horizontal design load that is installed into the garage door based on wind speed, building height and the garage doors location.

Disconnect Chain

A chain that allows the operator to allow manual use of the emergency hand chain to open and close the garage door in case of power failure.

Door Movement

There are four different types of garage door movement: standard lift, high lift, full vertical lift and low head room. The type of door movement that is best for your garage door depend on the room available between the top of the door and the first obstruction.


* Casing – Framing members that finish the garage doors opening
* Check – A device that insures the self closing of a door or wicket
* Closer – A device that combines a spring to close the door and a checking arrangement that prevents the door from slamming when closing
* Frame/Framework – Two door jambs and a door header where the garage door fits
* Guide – See Track
* Header – Located at the upper part of a door frame and consisting of the head jamb, head casing, stop and trim molding
* Jamb – Upright framing located on each side of the door opening
* Molding – See Door Casing
* Opener – See Electric Operator
* Opening – The opening dimensions of the garage door
* Path – See Trajectory
* Schedule – A construction document listing door sizes, locations and the special requirements for certain doors
* Stop – See Stop Mould
* Size – The dimensions of a garage door with the width being listed first followed by the height
* Section – A segment of a sectional garage door
* Double – See Double Door

Double Door

Larger width doors that are typically used on two car openings.

Double End Stile

Two stiles that are adjacent to one another and located at the end of a section.


* Low Headroom Track – See Double Track Low Headroom
* Shaft – Double torsion spring shaft that is utilized when more space is required for counterbalance spring lengths
* Strength Glass – A grade of glass that is typically ⅛” thick and lighter than most plate glasses
* Top Roller Fixture – A fixture located at the top section that features two top brackets that create a longer roller shaft
* Track Low Headroom – A second pair of horizontal tracks that reduce the height point of travel, allowing the door to be mounted in an area with minimal headroom


A wooden pin that can be glued between rails and stiles to strengthen the joints

Drawbar Operator

An electric operator that opens and closes the door by pulling and pushing the top section.

Drip Cap/Drip Lap

Devices that are placed near the garage door opening to prevent the elements from entering the garage.

Driveway Post

A post mounted in the driveway for key switches for automatic garage door openers.


An acronym for Double Strength Grade B Glass.

Duplex Spring

Two torsion springs of different sizes combined within spring fittings.

Eased Edge

Meeting rail edges that are rounded and sanded

Eased Off

See Eased Edge

Eave Height

The height measured from the ground to the bottom of an eave

Edge Grain

Wooden rings that form an angle of 45 degrees with the surface of the pieces

Electric Chain Hoist Operator

A garage door operator similar to a “Jack shaft” type operator which features an emergency chain house in the event of a power failure

Electric Interlock

Prevents the use of an electric operator under certain conditions

Electric Operators

A powered device that allows the operator to open or close the garage door with the press of a button


* Door Section – A door section with embossed panels
* Panel – A panel with surfaces raised to relieve from flat surfaces
* Rosette – A ornament designed out of weed, hardboard or aluminum that raises in relief of the surface
* Section – See Embossed Door Section
* Steel Door Section – See Embossed Door Section

Emergency Egress Device

A mounted faceplate with a pull handle that allows the operator to open the garage door manually or by spring tension


* Bearing Support – Plates that include a ball bearing to support radial movement of a torsion shaft usually located on torsion spring counterbalance units
* Bracket – See Bearing Support
* Hinge/Roller Hinge – Hinges located on the edge of door sections that allow sections to pivot when the garage door opens or closes
* Stile Lock – A sliding deadbolt lock or spring latch only operable from the inside
* Stile Sealing Strip – Plastic strips used to seal section at end stiles of steel and fiberglass doors

Exhaust Traps

Used to expel exhaust from a vehicle to outside of the garage

Extension Springs

Typically mounted along the horizontal section of track that provides power or tension by stretching or pulling

Exterior Lock

A keyed lock located on the exterior of the garage door


Shapes created by forcing hot aluminum or plastic billets in the extrusion press

False Louver Molding

Molding with a special angular shape, when fitted together it gives the appearance of a slatted panel.


A metal cap or ring that is attached to a cable to form a loop or button at the end.

Finger Joint

Usually nailed to the outside jamb of the garage door. It creates a seal around the door to protect against weather and keeps light out.

Finish Moulding

Also known as Stop Mould, serves as a seal around the garage door to protect against weather and light infiltration.

Finished Door Opening/Finished Opening

The opening measurements taken between the floor and header and between the face of jambs

Fire Station release

An opening mechanism that should be installed for garage door installations that require quick automatic door opening without the use of an electric door opener.


Same as Jamb Angle

Flag Angle

Same as Jamb Angle

Flag Bracket

Same as Jamb Angle

Flame Spread Index

A way of measuring horizontal flame across a product under controlled laboratory conditions. It is then compared to the performances of gypsum board which is standardized to 0 and to red oak which is standardized 100.


A device that automatically locks garage doors

Floor Seal

A weatherstrip seal that is attached to the bottom of a door that seals against the floor

Flush Door/Flush Design

A door made up of sections that are unbroken be visible rails and stiles to give the door the appearance of an even surface

Follow Roof-Line Hardware

Same as Contour Track

Follow-The Roof Track

Same as Contour Track

Front-Mounted Spring

A counterbalance spring that is installed to the header at the top of the garage door

Full Vertical Lift

A door hardware design that makes doors open vertically and requires no horizontal tracks

Full View Section/Full Vision Section

A section of the door that is totally glazed with various clear plastic or glass. These sections are formed of aluminum extrusion that is put together with aluminum or steel sections above and below.


A coating of zinc that helps protect steel from corroding.

Garage Door Monitor

A device that allows one to check on their garage door to ensure it is closed anywhere in a home. It can also close the garage door.

Garage Door Opener

An electric mechanism that is in control of moving the garage door up and down.


This is a unit of measurement employed to determine sheet metal thickness. The larger the number, the thinner the steel, while the smaller the numbers, thicker the steel.


A wheel with teeth that intertwines with another similar toothed device to transfer torque. Devices with gears can change the direction, speed, and torque from the origin of power.


When an item is equipped with clear plastic or glass panes.

Glazing Strip

An apparatus that prevents water permeation. It is a strip typically made of rubber or plastic and rests against framed windows and glazing.

Grease Packet

A small pouch containing lubricant.


This gives the illusion of divided lites and is embedded in a window.

Guard Angel

This device provides additional support for the vertical track. It is recommended when electric material handling equipment, such as fork trucks, are being used.


A corner reinforcer that is either cast, stamped, rolled, or extruded aluminum. It stabilizes corners or joints when secured.

Gusset Plate

An appliance secured to the door header to provide backing for both track and spring construction.

Hang Down

This refers to the length of the door that is needed to cover the opening when the door is closed.

Hanging Iron

The hanging iron is the same as an angle iron. See angle iron.

Hardware Options

There are many hardware options available to you. These include 11-gauge hinges, 12 gauge continuous angle, bridge strut, precision rollers, safety bottom brackets, and more. Talk with one of our technicians to determine what hardware you need for your garage door.

Hardware Systems

There are several hardware systems you need for your garage door to function. These include tracks, hinges, rollers, springs, struts, and more.


This is used to support the lifting drum and is located on the edge of the door.


This is the length of space you need between the tracks and the ceiling for the door to operate.

Heliarc Weld

Welding using helium or argon that creates an inert gas-shielded arc.

High Arc

This is another word for trajectory. See trajectory.

High Lift

This is the length of space that is measured from the header to the underside of the horizontal track for high lift doors.

High Lift Drum

This drum is designed to balance a high lift door. It is contoured to aid in the balancing.

High Lift Track

When you have a vertical lift door, you need the right track and hardware to door raise above the top of the door opening before it gets into the horizontal position.

High Moment Arm

The high moment arm refers to the radius around the cable drum including the cable.


A hinge is attached to two sections of the garage door to allow them to move when the door is raised or lowered.

Hinge Support Plate

Hinges need a support plate to attach to. The support plate is screwed into the panel and then the hinge is put on top of that.

Hinge Tube

The hinge tube is a cylindrical part that connects two leafs together.


Hinges are used to join panels together so that they move when the door is raised or lowered.

Hoist Electric Operator

This is used in case of power failure. It works like the jackshaft-type opener, but has an emergency chain that can raise the door when the power goes out.

Horizontal Rise

The horizontal rise causes the door to start down the track and puts tension on the garage door cable.


* Track- The horizontal track is the part of the track assembly that is horizontal.
* Angle- The track has an “L” shaped angle fixed to it called the horizontal Track angle.
* Assembly- When the door is in a horizontal position, it relies on the horizontal track assembly to keep it in place.
* Track Radius- The horizontal radius can also be referred to as the track radius.

Hot Off the Floor

When your garage door lifts off the floor without you doing anything, it can be referred to as “hot off the floor”.

Inclined Track

A type of garage door lift that is made for a higher roofs.

Industrial Door

Protects against bad weather, these doors are heavy duty and made using slates of aluminum, galvanized steel, and stainless steel.

Inside Hook Up/Bottom Bracket

This product holds the bottom roller and on the side of the bracket their is a pin that holds your torsion or extension cable.

Inside Lock

Sliding lock located on the interior side of the garage door.


The process of which a tech will properly come out and put in a garage door.


A company that will professionally install a garage door for you.

Insulated Door

A garage doors that cut cost, provides a warmer garage, and drowns out street noise.

Insulating Glass

Energy efficient glass that helps with cooling and heating the garage.


A product of material that makes it easier to keep the cold out during winter and will keep your garage cooler in the summer.


Interlocking joints that tripple connect to block hot and cold air producing a barrier to keep air from coming in and out.

Interlocking Joints

To stop air from exiting and entering the garage. A barrier is made by interlocking joints that connects three times to block the air.


A number for the garage door that every torsion spring has. The weight of the garage door is the reason for the certain number to be the correct inches-lbs-per-turn.


Stands for “inside looking out”.

Jackshaft-type Operator

Used only for vertical lift doors or doors which have a high lift clearance. It is the electric operator which is mounted on the ceiling or wall and works with the drive to turn the torsion shaft.


* Angle – vertical track fastened to the door jamb, uses full height continuous angle
* Bracket – an L-shaped bracket that is used to connect the vertical track to the jamb
* Guard – additional protection for the back of the vertical track; recommended for powered forklifts and other such equipment in an operating area
* Seal – for the edge of the door to protect against weather and light infiltrations; typically nailed to the jamb outside of the door
* Extension – needed for the support of the door track and spring assemblies; frames the extensions of the door jambs above the opening height


* Rabbeted – see joint shiplap
* Shiplap – creating weather tight seal between the door sections; the raised back portion and the lowered front portion of the joint work together
* Tongue-and-Groove – joint in which the raised interior portion and the lowered interior portion are fitted together to make a tight weather seal between the sections of the door
* Bracket – secures vertical and horizontal tracks
* Seal – protection used to keep the outside elements from coming into the garage area


The thermal conductivity measurement of a material.

Keeper Plate

Also referred to as a striker plate, this mounts onto the track as part of the locking mechanism.


* Alike: See Keyed-Alike.
* Switch Control: Key-activated switch used for secure operation of the door.
* Way: Grooves of varying shapes that are cut into a component, which are fitted with a key that locates and drives the parts of the shaft.

Keyed Shaft

A shaft designed with a built-in key way.


To have more than one lock designed to open with one key.

L – Strut

Additional support on horizontal sections of the garage door. It is attached to the inside of the door and prevents bulging or caving in. It also aids in the garage doors wind load capacity.

Lag Screw

A large, sturdy screw made of wood. It has a coarse thread and square or hexagonal head.

Lap Jamb

This is created when sections of the garage door overlap the openings on each door jamb.

Lapped Joint

This joint creates a secure seal between sections of the door to protect from bad weather. It is formed by the elevated back of a section joint connecting with the lowered front portion of another section joint.

Laser Garage Parking Assist

A mechanism that shines a laser onto the dashboard of the car entering the garage. This allows the driver to park safely and consistently within the garage.

Latch Lock

An automated device that locks the garage door.

Lateral Force

Occurs when force is exerted from the side or to the side.


* Bracket- A support system that allows the attachment of cables and installation of rollers. It is located at the bottom of the garage door.
* Cables/safety cables-This allows the garage door to be lifted and lowered. Depending on the weight of the garage door, the cables could have more steel wire and/or be broader. These cables are connected to the bottom brackets and drums. Safety cables are installed with extension spring systems and hold the spring in place in the event it should break.
* Clearance- This is the space between the header and the bottom of the horizontal track.
* Clearance Track-This track allows the garage door to lift well above the garage door opening before it transitions to lying flat.
* Handle- This handle allows the garage door to be opened manually rather than with an electric opener.
* Plate- This allows for the garage door to be opened manually and also serves as a step down plate.

Light Curtain

This is a safety feature that will stop the automated device from operating when a person is caught in its path.


Glazing that is installed in a door.


* Bar with Cremon- The cremone can be pivoted either outside or inside of the garage door and will cause the door to lock in place by pushing lock bars onto the path of the track.
* Lock- on Bottom Roller Bracket-This bracket, located at the bottom of the garage door, holds track rollers and allows for the attachment of lifting cables.
* Strike- This plate, when used with a locking system, ensures the functionality of the locking feature.

Logic Board (circuit)

A circuit board that is the control center for the operation of the garage door. When electric equipment, like keypads and openers are not operating, there could be an issue with the logic board.

Long Life Components

Equipment used for garage door systems that contain aluminum, Dura+ accessories, and corrosion-resistant steel. They are long-lasting and reliable.

Long-Stem Roller

A roller with a length of seven inches or greater.

Loop detectors

This device is sensitive to disruptions within its magnetic field and signals for a garage door to open or close. It can be installed inside or outside of a building within six feet.


An opening that allows venting through screens or slats.

Low Headroom Hardware

Equipment that allows a garage door to function when headroom is minimal.

Low Lift Hardware

When minimal headroom is present, these low headroom parts allow a garage door to work properly.

Low Moment Arm

This is the shortest distance from the axis of the shaft to the middle of the cable that is a part of the cable peel off point within the cable drums.


An acronym that means “left side looking out.”


Lubricant is a material that can be used for lubrication. When lubricating an item, it becomes glossy and can cut down on friction.


Performing upkeep on a garage door to keep it working properly.


A company that produces goods for sale.

Master Keyed

When keyed cylinder locks can be locked or unlocked using one “Master” key.

Master Keying

When one “Master” key can be used to lock or unlock multiple cylinder locks, despite having different keyed cylinders.

Meeting Rail

The top or bottom horizontal rail that attaches to a seal that is weatherproofed.

Metal Skin

The exterior of a metal.

Metallurgist Report

The record of a particular metal’s composition.

Microwave Motion Sensor

When objects move close or away from the door, this device recognizes the motion and signals for the door to operate accordingly, by opening or closing.

Mill Certification

Information provided on a particular metal from the mill that produced it. The document states what the metal is made of, as well as, heat and structure of that metal.

Mini 3-Button Remote Control

This is a smaller, keychain version of the 3-button remote control. It can control three different doors, indoor lights and appliances, and opener lights.

Minimum Headroom/Sideroom

Space required vertically above the opening of the door and below the lowest object on the ceiling that will allow the door to work properly.
A measurement performed horizontally from the sides of the opening of the door to the nearest object.


This acronym stands for Maximum Inch-Pounds. This relates to the amount of torque that is necessary on a shaft to lift a door of a certain weight. It can also be used to describe the torque capacity of a given wire size to perform at a particular cycle level.

Modular Coordination

The proportioning of building components to ensure they will come together correctly when installed.

Monitored Optical Edge

This monitored system works to provides protection against entrapment, particularly for commercial operations.

Motion Detecting Control

A mechanism that will turn on the garage door opener lights once motion is detected.

Mounting Plate

An appliance that is attached to a wall and aids spring shaft bearings, chain hoists, spring supports, and mountings for users. It is typically flush and made of steel or wood.

Movable Post

A post that allows for two or more doors to be used within one opening. It has a center made of aluminum that can be moved once the doors are lifted.

Multi-function Control Panel

A panel located within the garage that controls opening and closing the garage door, turning opener lights on and off, and contains an adjustable light timer.
* Mullion- Garage Door/Window
* Garage Door- A post that is vertical and is used to brace or support a door.
* Window- Part of the framing that separates window units.


A bar that provides support and divides glass panes on a door or sash.

Munton Window

A munton that has a fake, separated lite.

Mushroom Control Station

A control panel that, when pushed, will open the door fully and implement a “Timer-to-Close” function. This panel is useful in timely or emergency situations.


A vertical proponent of a section within the garage door that provides support.

MyQ Control

* For Smartphone- This device allows one to open, close, and oversee a garage door from anywhere using a smartphone. It also alerts when the garage door has been left open.
* Home Bridge- By using an app or Siri, this device allows Apple users to monitor their garage door, open and close it, and turn compatible lights on or off. It can be accessed through an Apple Watch, iPhone, iPad, or iPod Touch.
* Remote LED Light- This LED light provides additional lighting to any area of a garage. It must be plugged into an outlet to work and is compatible with the MyQ app.
* Technology- Technology that allows one to connect through wifi on a laptop, tablet, or smartphone and control his or her garage door. Homeowners can open or close the garage door, or check on it. It also connects and controls smart devices in the home, like lights.

Numbered Hinge

A hinge secured at the end of a door section. This hinge enables door sections to swivel as the door is brought up and down. Hinges also secure the track roller. They recieve numbers and are graded to make sure that, when closed, the door is flat against the jambs.

Numbered Panel

These panels are between stiles on the inside of the door. They are numbered starting from the left and moving right.

Numbered Roller Bracket

A hinge attached to the end of door sections that allow pivoting as the door closes and opens. These hinges grasp the track roller and are numbered and sequential for proper placement and to allow the door to lie flat against the jambs when the door closes.

Numbered Section

On a sectional door, this is one segment of the door.

Nylon Center Bearing

Lining that acts to limit, maneuver, or stop friction. It can be permanent or removable.


Waviness or unevenness in the garage door caused by a buckling in sheet metal


See Operator

Opener Height

The distance from the ground to the bottom of the header.

Opening Size/Width

The distance between the jambs of the door opening

Operation Cycle

A complete cycle of the garage door which is the garage door starting in the closed position, moving to the opening position, then moving back to the closed position.


An electronic device that can open or close the garage door

Other Kinds of Weather Seal

Weather seals that are specifically designed for certain climates or for certain garage doors

Outside Hook Up/Bottom Bracket

A bottom bracket that features a cable that is routed outside of the tracks

Outside Pull

A counterbalance cable on the outside of the tracks that causes a connection


Wood or hardboard used to create decorations for the outside of garage door sections

Pan Door

A garage door made out of sheet metal sections


A section on the outside of the garage door that is raised and decorative in design

Pass Door

A swinging pedestrian door that is built into a sectional door that is not recognized by most model codes

Pedestrian Door

An access door that is used to avoid the use of a sectional door

Perforated Angle

Metal with multiple punched holes used to hang garage doors and the garage doors operating systems

Perimeter Seal

Weatherstrips installed on the outside of doors to prevent the elements from entering the garage

Pinch Resistant

Doors that have been designed to keep the operator safe from finger injuries such as entrapping, crushing, breaking and severing

Plastic Muntin

See Muntin

Pocket Wheel

A wheel or drum that receives individual links that is used to transmit power


Foam insulation that are foamed in place on garage door sections by manufacturers

Pop Rivet

See Blind Rivet

Pounds Pull

The unit of force that can be found by dividing the torque by the moment arm of the drum

Power Unit

A unit consisting of springs, shafts, winding plugs as well as stationary cones, drums and cables. This unit allows your garage door to open and close on command


Steel panels painted with a primer then given an oven-baked top coat to finish the outside of the door


Laying on a coat of primer paint at the beginning of the painting process

Pull Down Rope

This rope is connected to the bottom bracket and can be used by the operator to manually open and close the garage door

Pull Rope

See Pull Down Rope

Pull Type Spring

See Extension Spring


A wheel that turns around an axis that runs a cable, chain or rope to open and close the door

Pulley Clevis

See Sheave Fork

Punched Angle/Brace/Iron/Track Hanger

See Angle Iron, See Angle Brace, See Angle Iron, See Back Hang

Push Down Spring

Push rods that are spring-activated and mounted on horizontal tracks that start the closing process of the garage door cycle

Push Nut

A metal fastener that is designed to be pushed onto a shaft for secure assembly

Pusher Bumper

A leaf spring that can replace a rod

Quarter Grain

See Edge Grain

Quarter Round

A round molding with a quarter circle located in its cross section

Quarter Turn

A unit of measurement when winding tensions into a torsion spring

Quick Turn Bracket

See Low Lift Hardware


Material used to slow down the transmission of heat, the higher the value the better the insulation performance

Radial Force

The force generated in the center of an object that moves toward the outside

Radio Transmitter

A device that can operate a large number of doors but has become invaluable with recent technological advancements


See Horizontal Radius

Radius Track

See Horizontal Radius


The horizontal piece of a section

Rain Ledge

See Rain Stop

Rain Stop

A ledge located where the rail meets the ground to prevent water from entering the garage

Raised Panel

See Panel

Rate of Rise

The measurement of change per a regular revolution

Rear Mount

A counterbalance system that is attached to the rear of the horizontal tracks

Rear Track Hanger

See Back Hang

Rear-Mounted Torsion

See Rear Mount

Red/Green LED Traffic Light

A light that indicated whether or not the door is open. Red means closed while green means open. The light allows safe entering and exiting of the facility

Regular Angle Mount

See Angle Mounted Track

Reinforcement Struts/Bridge Struts

These struts are used to support the garage door when it is in the open position

Remote Light Control

A control that can turn on or off lights in your home with a device

Remote Light Switch

A light switch that allows you to to turn off and on lights in your home remotely using a remote control

Retro-Reflective Photo Eye

This device makes installation easier with wire being on one side of the door and a reflector being on the other


Used for guiding the door along the tracks

Rounded Off

See Eased Edge


A device that connects an extension spring to a pulley that can also be used with other door related hardware

Safety Bottom and Corner Bracket

See Broken Cable Device

Safety Bottom Fixture

See Broken Cable Device

Safety Cable

A cable that retains the springs if they break

Safety Spring Containment/Kit

See Safety Cable

Sash/Sash Muntin

A framework that is used to hold glass panels in glass windowed garage doors


A door size, SC means “single car”

Scarf Joint

The combining of lumber and joining pieces using glue or pinning

Screw Joint

A cap that hides the screw and increases the doors appearance


Cutting the bottom door rail so it matches the style and color of the floor


See Escutcheon


A component that increases the width of a garage doors opening that is usually joined together by hinges

Section Meeting Rail Seal

A weather seal that is located between door sections

Sectional Door Switch

A switch that can disable the operating of the door to prevent damage to the door and operator

Sensing Edge

A 2-wire electric edge that may be used as ancillary protection devices


See Maintenance


Is an acronym for “single glazed”

Shaft Bearing

A bearing that maintains the torsion shaft alignment to reduce the amount of friction

Sheave Fork

A device that attaches the sheave to extension springs

Shiplap Section Joint

A joint interface that moves from one level to another level from the front of the door to the back

Shoe Molding

See Quarter Round

Shop Drawings

Drawings of the plans, section, size and details of a garage door that is created by the manufacturer and given to architect-engineers


See Decal

Side Bearing Plate

See End Bearing Plate

Side Seal

See Stop Mould


The measurement from one side of a door opening to the nearest obstruction

Single Door

Commonly used to refer to smaller width doors

Single Strength Glass/Thick Glass

A type of sheet glass that is commonly used in glazing sashes

Single-Button Remote Control

A remote that can close or open your garage door or operate the lights from the safety of your vehicle


The slope of a roof


See Bow

Snap Latch

See Automatic glass

Solar Glass

Tinted glass

Solenoid Brake

A heavy-duty actuated brake

Solid Rail

A rail that is made with a continuous piece of lumber that doesn’t have finger joints

Solid Shaft

A steel rod that supports the torsion springs. It is attached to the wall and when a chain hoist is used it is attached to the steel shaft

Special Door

A door that must be custom manufactured or specified


The quantity and types of material that is to be used in the construction of a garage door

Splice Plate

Plate that is used for the attachment of track at the junction


* Anchor – See Center Bearing Bracket
* Anchor Bracket – See Center Bearing Bracket
* Anchor Cone – See Stationary Cone
* Anchor Plate – See Center Bearing Bracket
* Assembly – See Torsion Spring Assembly
* Assembly Closed Wound – A torsion spring that has no gaps between the coils
* Assembly Open Wound – A torsion springs with equal gaps between each coil
* Balance – The number of turns required to counterbalance the door
* Constant – A formula used to describe the wire size and coil diameter combination
* Containment Device – See Containment Cable
* Fitting – A plug that is used to adapt the torsion spring to the torsion shaft or the center bearing bracket. The piece is a stationary cone
* Hook – See S-Hook
* Latch Hook – See Automatic Latch
* Pad – A pad that is installed on the header above the door that anchors the center bearing bracket. It can be mounted in different locations
* Plug – See Spring Fitting
* Retainer – See Spring Fitting
* Winding Cone – See Winding Plug

Square Key

See Key

Standard Headroom/Sideroom

See Headroom/Sideroom

Stationary Bearing Retainer

See Stationary Cone

Stationary Plug

See Stationary Cone

Stationary Sleeve

See Stationary Cone

Stationary Spring Cone

See Stationary Cone

Steel End Caps

Caps that are installed on the end of the panels that can be used with single or double hinges

Steel Jamb

A door frame that is created by a channel or angle iron

Steel Jamb Mounted

A tracking system that is created to mount a steel jamb

Step Down Plate

A way to close a sectional door during its last few inches of closing

Step/Lift Plate

A part that can be used as a step down plate or a lift handle that manually operates a sectional door


A vertical reinforcement member that is a part of a section

Stile-and-Rail Garage Door

A garage door that has sections each made up of horizontal rails and a vertical stile structure framing member

Stock Door

A standard size door that is typically kept in the inventory at either a distributor or factory warehouse


See Stop Mould

Stop Mould

This serves to seal the perimeter of a door so weather and light doesn’t enter the garage

Stop Moulding

See Stop Mould


See Striker Plate

Striker Plate

A plate that is used with a locking system to secure a lock mechanism


A support stiffener that reduces the deflection of the door sections when in the open position

Sway Brace

See Angle Brace

Sway Strap

See Angle Brace


See Trajectory

Swing-Away Post

A removable post that is attached at the top and can be pivoted out of the way

Swing-up Post

See Swing-Away Post

T Handle

Also called a T Lock Handle, this is a handle that is shaped like the letter “T”.

T Lock Handle

See T Handle.

Tapered Vertical Track

Also called an Inclined Track, the vertical track narrows away from the jamb, alleviating friction of the door release and providing a weatherproof seal.


Indicates a door opening size specific for two cars.


A piece of material specifically shaped to be used as a pattern or a guide. A plate or piece of wood used as additional support in a wall.

Tension Bridges

Used as reinforcements against excessive winds or extensive use in the open position.

Test Load/Wind Load

Measurement of exerted wind pressure against the structural load.

Thermal Barrier/Break

The space between the inner and outer parts of a door in which there is low thermal conductivity, preventing the transfer of heat and cold.

Thermal Seal

Also called a bottom weatherseal, this is a strip fixed to the bottom of the door to secure it to the floor.

Thermo-pane Window

A window made up of two pieces of glass that contain a gap in between. This gap traps air and provides insulation.


Also called oil-canning, this describes the presence of waviness in sheet metal caused by warping.


The process of cold-forming pieces of metal together using a punch and die method.

Tongue and Groove Board

Vertical boards assembled by the tongue and groove section joint method.

Tongue and Groove Section Joint

Attachment in which one panel contains a protruding edge that is interlocked into the grooved edge of the adjoining panel.

Top Carrier

See Top Fixture.

Top Fixture

Also called Top Carrier, Top Roller Bracket, or Top Roller Fixture, this is a bracket used at the top of the door for placement of the guide roller.

Top Rail

The rail that runs horizontally across the top of the door.

Top Roller Bracket

See Top Fixture.

Top Roller Fixture

See Top Fixture.

Top Seal

Stripping placed along the top of the door to protect against the weather.


Force caused by a twisting motion.


The use of force to twist or turn one end while the opposite end remains stationary.
* Bar: Long, made of metal, and used to shift torque from a spring to a winding plug
* Shaft: Shifts torque to a load from the springs
* Spring: A spring which is twisted in one direction on one end while being secured or twisted in the opposite direction on the other end in order to create torque.
* Spring Assembly: Parts constructing the counterbalance assembly.
* Spring Counterbalance Assembly: See Torsion Spring Assembly.
* Tube: See Torsion Shaft.
* Tube Coupler: Also called a coupler, this is used to connect one counterbalance shaft to another.


Channeled rails that house and guide the rollers on which a garage door operates.
* Bracket: Secures the track to the jamb.
* Clip: Fastens a track to a wall angle.
* Graduation: Measurement of the differential distance from the bottom to the top of the vertical track where it meets the jamb.
* Guard: Protects the back surface of the vertical track.
* Hanger Kit: Iron hanger that secures the horizontal tracks to the ceiling.
* Protectors: Reinforcements for vertical tracks.
* Radius: Indicates where the track changes from horizontal to vertical.
* Roller: Guides the door along the track.


Motion direction of the top of the door as it opens.

Translucent Door

A door that permits light to enter but is not see-through.

Transom Bar

A horizontal bar or beam that separates a door from the window above it.

Transom Section

Additional sections installed above the garage door to provide extra lift for the operator.


Finishing pieces, such as handles and door locks.

Triplex Spring

A set of three springs inserted inside each other.

Trolley Opener

See Drawbar Operator.

Trolley Type Opener

See Drawbar Operator.

True Divided Lite

A group of windows assembled together but separated by mullions to create a larger window.


See Strut.

Truss Bar

See Strut.

Tubular Shaft

A shaft that is hollow in the middle.


A complete revolution of 360 degrees around an axis.

Turns On Spring

The amount of turns found on a torsion spring.


Warping created by the winding of rail edges.

U – Strut

Supports the horizontal sections and increases the wind load capacity of a garage door.

U-Bar Truss

Provides additional support to prevent displacement of horizontal sections on a sectional door. It also improves the wind load capacity of the door.

U-Shaped Bottom Weather Stripping

Weatherstrip that is made of vinyl or neoprene and is secured to the bottom of the door. It has a “U” shape, is flexible, even in cold temperatures, and protects against wind and rain.


A unit of measurement by which heat is transferred from one side of the door to the other. The measurement is calculated in BTU’s and is the amount of heat transferred in one hour with a one degree temperature difference across one square foot of the door.

Upper Trajectory

When a door is lifted, this is the curve along which it travels when reaching the top portion of the track.

Upper Vertical Track

On a vertical lift door, this is the accumulation of the upper track.

Urethane- Finish

A top coat that is clear and used as a finish. It is most frequently used on wood.

Urethane- Insulation

An insulation made of foam typically used in garage door sections. The material is “foamed” into place within the section.


A top coat traditionally used on wood that has been finished. It is glossy in appearance and not appropriate for use on outdoor equipment as it’s not porous.


Allows ventilation by providing an opening, most commonly located on a lower portion of a garage door.

Vertical :

* Grain-Rings in wood that create a 45 degree angle or greater with surface pieces.
* Lift-When a door lifts vertically without the use of horizontal tracks.
* Lift Drum-A type of cable drum that can neutralize spring tension by changing the radius of its grooves.
* Post-Additional vertical support that aids against episodes of high wind.
* Splice Angle-Employing a continuous angle that reaches the entire height, to connect vertical track to the door jamb.
* Track-The section of track that sits adjacent to the jamb and is vertical.
* Track Assembly-This group is made by a vertical track piece joining with either jamb brackets or a continuous angle piece. It fastens together the track and the jamb.

Vision Lite

Glazing anchored onto a door.

Wall Control Panels

Typically mounted within the garage and primarily controls the opening and closing of the door, as well as, the opener light. Some control panels contain additional features.

Warning Tag

Safe use instructions and/or warnings contained on a tag.

Water Seal

A layer of some material that prevents water from seeping in.

Water Stop

Prevents water from entering underneath the door by providing a ridge located where the floor and bottom rail touch. This ridge also directs the water onto the driveway.


A component placed between joints or around the edge of the garage door that protects against the infiltration of heat, air, and poor weather.


A material located at the bottom of the garage door, or in between joints. It protects the garage from wind, weather, and heat.

Wedge Connection

Comprised of a clip and steel wedge that supports and protects the vertical and horizontal track section joints.

West Coast Lumber

Lumber used in producing wooden, sectional garage doors. It is manufactured on the west coast.

Wheel and Axle

Directs the sections of the door along the track.

Wicket Door

A swinging door constructed within a sectional door. It is specifically for pedestrians, but is not considered an exit door.

Wind Load

Takes building height, speed, wind, and horizontal location into account for the horizontal design load.


* Bar-A sturdy rod inserted into a winding plug socket for torsion springs tension.
* Cone-This part allows the torsion and winding to be adjusted. It fits in the torsion spring.
* Cone Set Screw-A fastener that bolts a winding plug to a torsion shaft.
* Cone Socket Head Set Screw-Allows the winding plug to be fastened to the torsion shaft.
* Plug-Fits on a torsion spring and allows the adjustment of tension and winding.
* Rod-A solid device that inserts into the winding plug socket to tension torsion springs.
* Sleeve-This part fits in a torsion spring. It allows for the maneuvering of winding and tension.
* Lite-Glazing fitted for a door.

Window Lite

Glazing that is placed in a door.

Winds on Spring

On a torsion spring, these are the number of winding turns.

Wire Glass

This glass contains woven wire netting that keeps it from shattering when impacted or heated.

Wire Rope

Rope that has been braided and contains multiple strands of wire that has been galvanized.

Wire Size

The width of a wire contained in a spring.

Wired Keypad and Cards

Allows for a code to be entered or a card to be read to control the opening or closing of a door or gate.


* Commercial Keypad-A sturdy keypad that can be mounted onto a pedestal. Uses a PIN that must be typed in, in order for the door to open. Multiple PIN’s can be programed into the keypad.
* Control Panel-A small panel mounted within the garage that can open and close the door, turn on the lights, and control the light timer.
* Keyless Entry System-A small, covered keypad that allows the garage door to be opened or closed by entering a code. It is typically mounted outside of the garage door.


* Anchor Pad- Padding secured above the door, on the header, to support a bearing bracket in the center. It can also be installed in other locations.
* Casing- A vertical piece of wood that creates one side of an opening.
* End Block- These are installed at the end of each panel and are attached to hinges and rollers. They provide additional support and a thermal block.
* Grain- The direction seen on the wood, most commonly on lumber.
* Jamb- A piece of wood standing upright, used to make a side of an opening.
* Jamb Mounted- When vertical track is installed into wood jambs.

Woodruff Key

A steel key with the shape of a half-moon.

You Can Trust Us for the Job

positive reviews

They sent Doug Fussell out to my house on the day after Christmas! I had only called them three days before! Doug was a premier technician, very thorough and very efficient. I expected him to take two days, since he was replacing two doors and adding openers on each door. He only took the daylight hours of one day! I could not believe how fast he was! In addition, he thoroughly taught me how to use the remote openers. I highly recommend them to anyone!
~Donald B.

positive reviews

We just bought a home and this company was so understanding as I had to change the appointment time a few times. Then the tech came out and was so kind and helpful. I could not have asked for a better experience and will suggest them to anyone who needs work done on their garage door!
~Tammy K.

positive reviews

My garage door broke on a Saturday night as I was getting ready to leave for a holiday party. Kelvin was here within 30 minutes. He reviewed everything with me that was happening with my door. He gave me the estimates of what was immediately needed to be done in order for my door to raise and then what I will need to have done very soon. I could see all the problems he pointed out to me and I decided to have everything done. He completed everything that night. I was very satisfied with Kelvin’s professionalism and the work he did. Thank you again.
~Joyce N

We Service All Makes and Models of Garage Doors and Openers