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Glossary

Glossary

Automatic Latch: Automatically locks door.
Automatic Opening Device: Opens door quickly without electric operator, see our listings here.
Back Hang: Iron hanger holds tracks to ceiling.
Back Jamb: Interior wood surrounding door.
Backroom: Distance from header above door to first blockage of headroom.
Ball Bearing:  Used to reduce friction, position moving machine parts, and carry loads to reduce the surface contact and friction across moving elements, see our listings here.
Bar Joist: Lightweight truss that can hold roof decks.
Bead: Strip to hold glass in window or garage door frame, see our listings here.
Black: Used for determining garage door spring wind direction. Usually signifies right side, left wound.
Blind Rivet: Tubular fasteners that contain a mandrel through the center. Used to hold two surfaces to each other.
Booster Spring: Extra spring to ensure proper counterbalance.
Bottom Corner Bracket: Keeps boards secured and even in a square or rectangle. Also for lifting cables.
Bottom Rail: Door's lowest rail.
Bottom Weatherseal: Weatherstrip between door and floor, see our listings here.
Bow: Crooked or bent door.
Bracket Mounted: Vertical track mounted to jamb with angle brackets, see our listings here.
Broken Cable Device: Safety part in case of cable breakage.
Bushing: A metal lining used on machinery with sliding or rotating shafts to improve efficiency and control friction.
Cable Clamp: Device that holds cables together during installation.
Cable Drum: Drum on torsion spring shaft that holds different types of cables, see our listings here, see our listings here.
Cable Drum Set Screws: Screws that hold drum to the shaft or tube.
Cable Length: Total cable needed.
Cable Safety Device: Safety feature in case of cable breakage.
Cable Stop: A swaged fitting to stop slipping .
Cam: Rod that rotates and slides against machinery to turn rotary movement into linear movement. See our listings here, see our listings here.
Cam Tube: Provides axial force.
Carry-Away Post: Removable center post.
Ceiling: Garage's interior top.
Center Bearing Bracket: Holds torsion shaft and spring assembly and anchors stationary cone to header, see our listings here.
Center Bearing Plate: Holds counterbalancing mechanism to torsion shaft and torsion springs to header, see our listings here.
Center Bushing: Helps center bracket support a torsion tube.
Center Hinge: Lets sections pivot when opening door and can serve as edge hinge between sections, see our listings here.
Center Lift Cable: Gives more lift for very big doors.
Center Post: Area between two doors or extra strength against wind.
Center Stile: Adds structural integrity and attaches to center hinge.
Center Track: Extra track helps stop doors from sagging.
Chain Hoist: A sprocket or pocket wheel that connects to torsion spring to ease opening and closing door, see our listings here.
Chain Hoist Operator: Jackshaft-type operator attaches to chain hoist, see our listings here.
Channel Frame: Steel flanges that follow the jambs.
Chill: A square shaft joining exterior and interior latches.
Clearance: Area available for proper installation.
Clevis Pin: Steel pin used with a cotter pin to hold cables, arms and brackets together, see our listings here.
Commercial: Overhead door designed for heavy commercial use.
Containment Cable: Safety cable in case of spring breakage, see our listing here.
Contour Track: Follows the layout of ceiling.
Corner Burn: Fire emergency test where fire starts next to garage door.
Cotter Pin: Commonly used to lock castle and slotted nuts, also secures clevis pins, wheels and machine components on an axle. Holds by flaring through a hole. See our listings here, see our listings here.
Counterbalance: Equalizes balance with a comparable force, see our listings here.
Counterbalance System: Decreases effort to operate doors.
Counterweight: Weights used to counterbalance door weight, see our listings here.
Coupler: Connects counterbalance shafts, see our listings here.
C-Value: Measure of how heat flows through insulation.
Cycle: One opening and closing of a door.
Cylinder: Lock mechanism, see our listings here.
Daylight Opening: Measurement between jambs, floor and header.
DC: Double-car door opening.
Dead Coils: Coils inactivated by spring plugs that do not affect spring load or spring rate. Often close wound coils added to increase height, assemble a spring attachment, or decrease tangling.
Dead in the Head: Door doesn't stay fully open due to lack of counterbalance.
Dead Load: Nonmoving load.
Decal: Basic data attached to door, see our listings here.
Design Wind Load: A garage door's capacity based on wind, location and height.
Disconnect Chain: Emergency feature for manual operation when power fails, see our listings here.
Door Casing: Frame trim surrounding door opening. Conceals unattractive construction gaps between frame and drywall.
Door Check: Ensures that pass door or wicket closes.
Door Closer: A mechanism that uses a spring to close the door quietly, see our listings here.
Door Frame: Enclosure for the door.
Door Header: Top of door frame.
Door Jamb: Sides of door frame.
Door Schedule: Overview of sizes and placements for doors.
Door Section: One piece of a sectional door.
Door Size: Door measurements.
D Shaft: A torsion shaft that limits spin of attachments.
Double Door: Two or more vehicle openings.
Double End Stile: Two neighboring stiles on both sides of section.
Double Glazing: Twice the glazing for better insulation and noise reduction.
Double Shaft: Double torsion spring shaft for more space with counterbalance spring lengths.
Double-Strength Glass: Extra-strength glass typically 1/8" in thickness.
Double Top Roller Fixture: Uses two top brackets to accommodate a longer roller shaft.
Double Track Low Headroom: An extra set of horizontal tracks used for applications with scant headroom.
Dowel: Wood cylinder for joining wooden pieces together.
Drawbar Operator: Lifts door electrically for doors with normal or low headroom, see our listings here.
Drip Cap: Designed to draw water away from door and building.
Drip Lap: Designed to protect steel doors from weather.
Driveway Post: Allows easy automatic operation of door via key switch.
DSB:  Glass that is double-strength grade B.
Duplex Spring: A pair of different-sized torsion springs. A smaller spring is placed inside the larger spring, with both working together.
Eased Edge: A contoured meeting rail edge.
Eave Height: Measurement of height from ground to roof eave.
Edge Grain: Quartersawn lumber.
Electric Operator: Electrically opens and closes door, see our listings here.
Electrical Interlock: Device to stop door operation.
Embossed Door Section: Decorative raised design.
Embossed Panel: Panel with a raised design.
Embossed Rosette: Raised ornamental design of wood or metal.
End Bearing Plate: Helps radial movement of a torsion shaft at each end of torsion spring counterbalance, see our listings here.
End Stile: Stile located at end of door section attached to graduated edge hinges.
End Stile Sealing Strip: For sealing sections at end stiles of steel or fiberglass doors.
Escutcheon: A flat piece of metal that surrounds and protects the exterior of a lock mechanism, including keyholes, door handles, and light switches. See our listings here. see our listings here.
Exhaust Port: Takes hose to safely remove vehicle exhaust, see our listings here.
Extension Spring: Stretches or pulls to increase tension or power, see our listings here.
Exterior Lock: Outside keyed lock, see our listings here.
Extrusion: Process for forming metal and plastic parts, see our listings here.
False Louver Molding: Looks like a slatted panel.
Faux Divided Lite: Mullions divide glass and light.
Ferrule: Caps a cable's end.
Finger Joint: Joins two pieces of wood.
Flame Spread Index: Measurement of how quickly a flame will spread horizontally.
Flush Door: Even-surfaced door with wood veneer, MDF, or laminated outer layer attached with adhesive. Offers fewer customization options compared to stile, rail, or panel doors. See our listings here.
Front Mounted Low Headroom: For low-headroom mounting.
Front-Mounted Spring: A header-mounted spring for counterbalance.
Full-View Section: Glazed with glass or see-through plastic.
Galvanizing: Process of applying a protective zinc coating to iron or steel to protect metal against rust.
Gauge: System standardizing weight per square foot.
Glazed: Covered with glass or see-through plastic.
Glazing Strip: Protects window and frame from elements.
Graduated Edge Hinge: Lets door sections pivot during opening and closing.
Grease Packet: Small amount of grease for lubrication, see our listings here.
Grille: Window insert that gives divided lighting effect.
Gusset: Metal reinforcement for corners.
Gusset Plate: Reinforces track and spring assembly.
Hang Down: The part of door hanging down while open.
H-Column Jamb: Separates pair of door openings for H-columns.
Headplate: Supports lifting drum.
Headroom: Clearance between door and ceiling and obstructions.
Heliarc Weld: A versatile, durable style of weld. Often used to describe the TIG welding process.
High-Cycle Spring: Long-life spring for heavy use.
High Lift: Measurement between header and horizontal track's bottom for high-lift track.
High-Lift Drum: Drum made for high-lift door, see our listings here.
High-Lift Track: Makes door open higher before retracting horizontally.
High-Moment Arm: Cable-drum's radius.
Hinge: Attaches door sections while letting them pivot, see our listings here.
Hinge Support Plate: Reinforces the hinge mount.
Hinge Tube: Attaches a pair of hinge leaves to each other.
Hoist Electric Operator: Includes a chain hoist for power outages.
Horizontal Radius: Moves from vertical to horizontal track.
Horizontal Rise: Horizontal track's rising slope starts the door down.
Horizontal Track: Moves door horizontally.
Horizontal Track Angle: Reinforces horizontal track.
Horizontal Track Assembly: Track and reinforcement angle move and hold door horizontally.
Hot off the Floor: Unwanted rising of door from floor.
Inch-Pounds: Torque measurement.
Inclined Track: Smooth-moving vertical track that protects against weather and friction.
Inside Hook Up: Counterbalance cable inside track.
Inside Hook Up Bottom Bracket: Cable routed via bottom corner bracket.
Inside Lock: Lock operated via door interior.
Installation: Installing door.
Installer: Person who installs door.
Insulated Door: Doors with insulation.
Insulating Glass: Glass with insulating air spaces between panes.
Insulation:  A material that resists outside temperatures to maintain the desired temperature in a home or facility year-round.
IPPT: Inch-pounds per turn denotes a spring's torque rate.
ISLO: Inside looking out.
Jackshaft-Type Operator: Wall- or ceiling-mounted device turns torsion shaft, see our listings here.
Jamb Bracket: Joins vertical track and door jamb, see our listings here.
Jamb Extension: Used to hold door track and spring assemblies above opening height.
Joint, Shiplap: Raised part of a section joint used between door sections for a weatherproof seal.
Joint, Tongue-and-Groove: A locking joint for weatherproofing connections between door sections.
Key: In mechanical engineering, the key is a machine element that connects a rotating part to a shaft and keeps parts from rotating.
Key Switch Control: Alternative to push button or transmitter to start door operator, see our listings here.
Key Way: Groove used with key to stop rotation of parts on shaft.
Keyed-Alike: Locks that the same key can open.
Keyed Shaft: Contains an integrated key way.
K-Value: A material's thermal conductance.
Lag Screw: Coarse-threaded wood screw, see our listings here.
Lap Jamb:  Door sections overlap both jambs by one inch.
Lateral Force: Total net force acting on an object in the lateral direction from the side. Often used with horizontal direction.
Lift Handle: Manual door opener, see our listings here.
Lintel: Structural support over opening.
Lock: Keeps door securely shut, see our listings here.
Lock Bar with Cremone: Locks door with rotation.
Long-Stem Roller: 7-inch-plus roller, see our listings here.
Louver: Ventilates via slats or screen.
Low-Lift Hardware: Parts for using a door system with limited headroom.
Low Moment Arm: Measurement of the shortest distance from shaft axis to cable center.
LSLO: Left side looking out.
Lubricant: For lubricating, see our listings here.
Lubricate: To decrease friction.
Maintenance: Maintaining a system in good running condition.
Master Keying: Opening multiple locks with one key.
Meeting Rail: Top or bottom horizontal rail forming a seal.
Metallurgist Report: Describes components of a metal.
Mill Certification: Technical description of a metal by its maker.
MIP: Maximum Inch-pounds.
Modular Coordination: Coordinated dimensions of building components.
Mounting Plate: Steel or wood plate for mounting, see our listings here.
Movable Post: Transportable post for use of multiple doors in one opening, see our listings here.
Mullion, Garage Door: Vertical door reinforcement that separates two panels in the middle of the door between the rails.
Mullion, Window: Vertical bars that divide the panes in a window.
Muntin: Strip that separates window panes in sash.
Munton, Window: Makes a faux divided light.
Neoprene: Synthetic rubber that is generally stronger and harder than natural rubber as well as more resistant to water, oils, and solvents.
Nicopress Sleeve: Cable sleeve made of aluminum or copper.
Numbered Panel: Left-to-right numbered space between stiles.
Opening Height: Height from ground to header bottom.
Opening Width: Width of door opening.
Operator: Device that moves door up or down, also known as an opener,see our listings here.
Outside Hook Up: Connects counterbalance cable on tracks' outside.
Outside Hook-Up Bottom Bracket: Cable on outside tracks goes via bottom corner bracket.
Overlay: Ornamental wood or metal for exterior door sections, see our listings here.
Pan Door: Door made with sheet-metal sections.
Panel: Raised design on sections, see our listings here.
Pass Door: Swinging door built into sectional door for foot traffic.
Pedestrian Door: Door for foot traffic next to garage door.
Perforated Angle: Metal part hangs garage doors and operators from punched holes.
Perimeter Seal: Weatherstripping around door, see our listings here.
Pinch Resistant: Designed to avoid catching and hurting fingers.
Pocket Wheel: Chain-link drum or wheel that transmits power, see our listings here.
Polyurethane: Foam insulation used in doors, see our listings here.
Pounds Pull: Measurement of drum force.
Power Unit: Torsion spring assembly.
Prefinished: Comes painted.
Prime: Paint undercoat.
Prime-Painted: Primed with primer for final finish painting.
Pull-Down Rope: To pull door down by hand, see our listings here.
Pulley: Pulls cable, chain or rope, see our listings here.
Purlin: Roof beams that are often used in industrial buildings that support the mid-span of rafters. Pusher Bumper: Also known as a Leaf spring. Used to keep downward pressure on a door.
Push-Down Spring: Push rods that make door start closing.
Pusher Bumper: Leaf spring.
Push Nut: Metal fastener that pushes on to a shaft, see our listings here.
Quarter Round: Molding cut as quarter of a cylinder.
Quarter Turn: Turn measurement for torsion spring winding tension.
Radial Force: Force emanating from the middle outward.
Rail: Horizontal piece of section, see our listings here.
Rain Stop: Part to keep water from running under door.
Rate of Rise: Measures drum's movement arm revolution rate.
Rear Mount: Counterbalance system connected to horizontal tracks' rear, see our listings here.
Red: Used for determining garage door spring wind direction. Means left side, right wound.
Removable Center Post: Movable post that serves as a jamb in large openings to accommodate many doors rather than one.
Removable Jamb Wall: Wall allows use of multiple doors in one opening.
Residential: Overhead door for residential use, see our listings here.
Reverse Angle Mount: Permits use of doors in garages with low headroom or side room.
Roller Bracket: Holds track roller.
RSLO: Right side looking out.
R-Value: Measurement of thermal resistance.
Sash: Window or door framework for glass, see our listings here.
Sash Muntin: Bar for glass in sash with multiple lights.
SC: Single-car door.
Scarf Joint: Joining wood with glue and dowels.
Scribing: Cutting the door's bottom to fit the floor.
Section: Part of garage door.
Section Joint Meeting Rail Seal: Weatherproofing between sections.
Sectional-Type Door: Door made with multiple hinged sections.
SG: Single glazed.
Shaft Bearing: Keeps torsion shaft in alignment and decreases friction, see our listings here.
Sheave: Pulley designed for counterbalance system, see our listings here.
Sheave Fork: Attaches sheave to extension springs.
Shiplap Section Joint: Interface for joint sections.
S-Hook: Used to attach door hardware.
Shop Drawings: Manufacturers' or suppliers' illustrations to ensure correct execution of architectural plans.
Sideroom: Distances from sides of door opening to nearest horizontal obstructions.
Single Door: One-vehicle opening.
Single Thick Glass: Glass for sashes.
Slant: Roof angle.
Solar Glass: Tinted glass.
Solid Rail: A jointless rail.
Special Door: Custom door.
Specifications: Listing of quality and materials for system.
Splice Plate: Attaches tracks, see our listings here.
Spring Assembly Closed Wound: Gapless coiled tension spring.
Spring Assembly Open Wound: Gapped coiled torsion spring.
Spring Balance: Number of turns required as counterbalance to door.
Spring Bumper: Slows upward movement of door to prevent shocks and rope breakage.
Spring Constant: Formula to find number of active coils necessary per spring.
Spring Fitting: Adapts torsion springs to torsion shaft or center bearing bracket.
Spring Pad: Anchors center bearing bracket from header.
Stationary Cone: Connects torsion spring to center bearing bracket.
Steel Jamb: Iron door frame.
Steel Jamb Mounted: Track system for steel jamb.
Steel Pin: Helps secure door rails and dowels, see our listings here.
Step-Down Plate: Closes door final inches.
Step/Lift Plate: Step-down plate that doubles as manual door handle, see our listings here.
Stile: Reinforces a part of a section.
Stock Door: Door for standard-sized opening.
Stop Mold: Goes around door for protection from elements and sunlight, see our listings here.
Stress: Measurement of a spring's work load.
Striker Plate: Part of locking system, see our listings here.
Strut: Reinforces door for structural support and against wind.
Swing-Away Post: Swiveling center post that can be swung aside.
T Handle: T-shaped handle, see our listings here.
TC: Two-car opening.
Template: Plan for shape or drilling; also, a short header for beam support.
Test Wind Load: Measurement of wind resistance.
Thermal Break: Space between outside and inside parts of door section.
Tog-L-Loc: Mechanical means of attaching steel parts.
Tongue and Groove Section Joint: Joint for joining adjacent door sections, see our listings here.
Tongue and Groove Board: Wood that look like wainscoting, see our listings here.
Top Fixture: Attaches top guide roller to door's top section, see our listings here.
Top Rail: Horizontal rail at top of door.
Top Seal: Weatherstripping that seals opening along door top, see our listings here.
Torque: Measurement of force caused by rotation.
Torsion: Force turning one end while the other end remains still.
Torsion Bar: Long bar made of metal that moves torque from spring to winding plug, see our listings here.
Torsion Shaft: Moves torque from springs to load, see our listings here.
Torsion Spring: Turns one end while the other remains stationary or is turned the other way, see our listings here.
Torsion Spring Assembly: Parts for counterbalance assembly.
Track: Channel along which doors run via rollers.
Track Bracket: Holds track to jamb.
Track Clip: Attaches track to wall angle.
Track Graduation: Measurement of differential distance from track to door jamb.
Track Guard: Protects vertical track back, see our listings here.
Track Roller: Guides door on track, see our listings here.
Trajectory: Movement of top section as door opens.
Translucent Door: Allows some light to pass but isn't see-through.
Transom Bar: Horizontal piece above window or door.
Transom Section: Spare section on top of opening giving more lift for trolley-type operator.
Trim: Finishing parts, including handles and locks.
Triplex Spring: A group of three springs inside each other.
True Divided Lite: Multiple windows separated by mullions to make one bigger window.
Tubular Shaft: Empty shaft
Turn: One full revolution.
Twist: Type of warp due to twisting rail edges.
Urethane (Finish): Clear coat to protect and beautify wood.
U-Value: Measurement of heat transfer through door.
Upper Vertical Track: Upper track assembly.
Varnish: Clear coat good for interior wood.
Vent: Opening allows air exchange, see our listings here.
Vertical Lift: Design requiring no horizontal tracks for opening doors vertically, see our listings here.
Vertical Lift Drum: Cable drum with grooves to handle spring tension, see our listings here.
Vertical Post: Reinforces against strong wind.
Vertical Track: Up-and-down track next to jamb, see our listings here.
Vertical Track Assembly: Vertical track and brackets held to jamb.
Vision Lite: Door-mounted glazing.
Warning Tag: Safety advisory.
Water Seal: To prevent moisture damage.
Weatherstrip: Material to insulate and protect against elements, see our listings here.
Wedge Connection: Holds vertical and horizontal track sections where they meet.
West Coast Lumber: Wood from the U.S. Pacific Coast often used for garage doors.
Winding Cone: Piece in torsion spring for winding and adjusting tension, see our listings here.
Winding Plug Set Screw: Locks winding plug to torsion shaft.
Winding Rod: Tensions torsion springs via winding plug's socket.
Winds on Spring: Total turns on torsion spring, see our listings here.
Wire Glass: Glass reinforced against heat and breakage, see our listings here.
Wire Size: A wire's diameter.
Wood Grain: Wood pattern and orientation.
Wood Jamb: Perpendicular wooden pieces on an opening's sides.
Wood Jamb Mounted: Vertical track mounted on wood jambs.
Woodruff Key: A semicircular key, see our listings here.