Garage Door Parts Glossary of Terms
At Star Door Parts we specialize in replacement garage door and opener parts and accessories. Our knowledgeable staff can help you determine the right parts for your residential or commercial door system. We have complied the following glossary of garage door terms to help identify the parts you need. If you have any questions just call us at (952) 818-6633. We offer the fastest shipping available due to our huge in stock inventory. Order online or call today!
Astragal
Retainer:
See Bottom Weatherseal
Automatic
Latch:
An automatic door locking
device
Automatic
Opening Device:
Quick opening
mechanism recommended for installations requiring rapid automatic door opening
without use of an electric operator
Back Hang:
Hanger fabricated from angle iron,
which attaches the end of the horizontal tracks to roof construction or ceiling
Back
Jamb:
Wood member on the inside
surface of the garage, surrounding the door opening
Backroom:
Horizontal distance measured into a
building from the face of the header above a garage door opening to the first
obstruction at the required headroom
Ball
Bearing:
A load bearing device that
uses trapped rolling balls to reduce rotating friction
Ball
Bearing Drum:
Counterbalance drum with
a ball bearing for smoother operation of heavier doors
Bar
Joist:
A lightweight truss adaptable
for the support of roof decks
Bead: A strip of metal, vinyl, or rubber used to secure
glass around the periphery of a pane
Black: Color-marking convention to mark parts as Right Side,
Left Wound
Blind
Rivet:
A type of fastener that
mechanically joins two pieces of material together by means of a riveting tool
Booster
Spring:
Additional spring, usually an
extension spring, provided to compensate for weakened counterbalance
Bottom
Bracket:
See Bottom Corner Bracket
Bottom
Corner Bracket:
A structural support
located on the bottom section that holds track rollers and may also provide for
attachment of lifting cables
Bottom
Corner Fixture:
See Bottom Corner Bracket
Bottom
Fixture:
See Bottom Corner Bracket
Bottom
Rail:
The lower-most horizontal rail
of a door section
Bottom
Roller Bracket:
See Bottom Corner
Bracket
Bottom
Weatherseal:
Weatherstrip attached to
the bottom rail of a door to seal against the floor
Bow: Condition where a garage door bottom rail of a wood
door is not level or straight, which is characterized by a closed door
“smiling” (corners turned up)
Box
Strut:
See Strut
Bracket
Mounted:
Method of fastening vertical
track to jamb using angle brackets
Bracket-Mounted
Track:
See Bracket Mounted
Breakaway
Track:
See Angle Mounted Track
Breakstem
Rivet:
See Pop Rivet
Broken
Cable Device:
A bottom fixture
intended to prevent a door from falling in the event of cable breakage
Buck: See Back Jamb
Bushing:
A fixed or removable lining used to
constrain, guide, or reduce friction
Cable: See Aircraft-Type Cable
Cable
Clamp:
Manufactured device used to
secure two pieces of cable to each other
Cable
Drum:
Grooved drum, fitted on torsion
spring shaft, onto which lifting cable is wound when door is opened
Cable
Drum Set Screws:
Normally refer to
set screws that attach the drum to the shaft/tube. One screw may secure the
cable to the drum in order to secure proper cable length.
Cable
Length:
Specific amount of cable
required to properly operate door
Cable
Safety Device:
A bottom fixture
designed to slow or stop the descent of a door in the event of a cable breakage
Cable
Stop:
A swaged fitting at the end of
the cable to prevent slippage through a slot in a drum
Cable
Stopping Device:
See Broken Cable
Device
Cam: Rotating piece that transfers rotary motion into
linear motion
Cam
Tube:
Tube encasing a torsion spring
assembly that imparts axial force
Carry-Away
Post:
A type of removable center post
Ceiling:
Top horizontal surface in the
interior of a garage
Center
Bearing Bracket:
A bracket that
houses a shaft bearing and aligns and supports the torsion shaft and spring(s)
assembly. Also serves to anchor stationary cone(s) to header
Center
Bearing Plate:
A plate or bracket
that can house a shaft bearing and is used to align and support the
counterbalancing mechanism to the torsion shaft as well as anchor one end of
torsion springs to the header.
Center
Bearing Support:
See Center Bearing
Bracket
Center
Bracket:
See Center Bearing Plate
Center Bushing: Metal or plastic bushing used with a center
bracket to support a torsion tube
Center Cable: See Center Lift Cable
Center Clamp: See Center Lift Cable
Center Coupler: See Coupler
Center Coupling: See Coupler
Center Hinge: A hinge generally located on the intermediate
stiles to allow sections to pivot as door opens. Also used as graduated edge
hinge between bottom and intermediate section
Center Lift Cable: Additional cable assembly which is secured to
outside of door at points toward the center of the door, used to provide extra
lifting support for extremely wide or heavy doors.
Center Post: The vertical building structure (or member)
between two single car doors, or a vertical reinforcement usually installed for
high wind events. Sometimes also used to refer to a Vertical Post.
Center Stile: Vertical member of a door section which provides
structural rigidity and location for center hinge attachment
Center Support Bearing: See Center Bearing Bracket
Center Support Track: See Center Track
Center Track: Added track giving additional support to
preventing sagging of a door in the open or horizontal position. Often used
with an exceptionally wide door, a heavy door or a door containing a pass door
Chain Hoist: Refers to sprocket or pocket wheel, connected to
torsion spring shaft, imparting mechanical advantage to open and close a door
Chain Hoist Operator: Jackshaft type operator to which chain hoist is
attached
Channel Frame: Frame used in jamb construction consisting of
steel channel shapes installed where the flanges of the shapes wrap around the
corners of jambs
Channel Truss: See Strut
Chill: A square shaft that connects an outside handle
to an inside lock set or night latch
Clearance: The amount of side room, head room and back room
required to properly install a sectional door
Clear Rail: See Solid Rail
Clevis: See Sheave Fork
Clevis Pin: A steel
pin used in conjunction with a cotter pin to hold a counterbalance cable to a
bottom bracket or an operator arm to an operator bracket
Commercial:
A sectional overhead type door which
is intended for vehicular use at entrances of buildings such as loading docks
and service stations, and is normally operated less than 5,000 cycles per year
Containment
Cable:
A cable threaded through an
extension spring to retain the spring if it breaks
Continuous
Angle:
See Reverse Angle Mount
Continuous
Angle Mount:
See Angle Mounted Track
Contour
Track:
Horizontal track that follows
the contour of roof construction or ceiling
Corner
Bracket:
See Bottom Corner Bracket
Corner
Burn:
A full-scale fire test
performed in a specially constructed room, where the ignition source is located
in the corner of that room, adjacent to the garage door
Cotter
Pin:
A half-round metal strip bent
into a pin, whose ends can be flared after insertion through a slot or hole
Counterbalance:
To oppose or balance with an equal
weight or force
Counterbalance
Shaft:
See Torsion Shaft
Counterbalance
System:
A system which counteracts
the weight of a garage door to allow a reduced force to open and close the door
Counterbalance
Tension:
See Counterbalance
Counterweight:
Design of door mechanisms using
weights instead of springs to counterbalance door weight
Counterweight
Balancing System:
See Counterweight
Coupler:
A device to connect two
counterbalance shafts together, end-to-end
Coupling:
See Coupler
“C”
Strut:
See Strut
C-Value:
Heat rate flow through an insulating
material when there is a temperature difference from outer to inner surfaces;
not normally used in conjunction with thermal transmittance through garage
doors
Cycle: One complete cycle of a door beginning with the door
in the closed position, then moving to the open position and back to the closed
position
Cylinder:
The part of a key operated lock that
accepts the key and contains the locking pins
Daylight
Opening:
Opening dimensions taken
between face of jambs and between floor and header
DC: Door opening size designation, denoting “double car”
Dead
Coils:
The number of coils rendered
inactive by the spring plugs
Dead-End
Cone:
See Stationary Cone
Dead in
the Head:
The lack of
counterbalancing when the door is in the open position, failing to keep the
door fully open
Dead
Load:
A static applied load, or a
load without movement, generally referring to the weight of the door
Decal: A template of information attached to a garage door,
or in its vicinity, to convey relevant information concerning the garage door
system
Decorator
Angle:
See Jamb Angle
Depth: See Backroom
Design
Wind Load:
Horizontal design load
applied to a garage door based on such factors as wind speed, building height
and door horizontal location
Direct
Drive Chain Hoist:
See Chain Hoist
Disconnect
Chain:
Used in conjunction with industrial
door operators to disengage operator and permit manual use of emergency hand
chain to facilitate operation of door in event of power failure
Disconnect
Hoist:
See Disconnect Chain
Door
Casing:
The framing members with
which a door opening is finished
Door
Check:
A mechanical device to insure
the self closing of a pass door or wicket
Door
Closer:
A device, combining in one
case, a spring to close the door, and a checking arrangement to prevent
slamming and to insure silent closing
Door
Frame:
The frame into which the door
fits; consists of two door jambs, and a door header
Door
Framework:
See Door Frame
Door
Guide:
See Track
Door
Header:
The upper part of a door
frame, consisting of the head jamb, head casing, stop and trim molding
Door
Jamb:
The upright framing on each
side of the door opening
Door
Moulding:
See Door Casing
Door
Opener:
See Electric Operator
Door
Opening:
See Daylight Opening
Door
Operator:
See Electric Operator
Door
Path:
See Trajectory
Door
Schedule:
A list of door sizes,
locations and special requirements shown on a construction document
Door
Section:
A single segment of a
sectional door
Door
Size:
Door dimensions characterized
by the width first and the height second
Door
Stop:
See Stop Mould
Door
Travel:
See Trajectory
D
Shaft:
A torsion shaft manufactured
with a flat area allowing minimum rotation of affixed hardware.
Double
Door:
Commonly used to refer to
larger width doors used on two car openings
Double
End Stile:
When a door section
utilizes two stiles adjacent to each other on each end of the section
Double
Glazing:
Use of two thicknesses of
glazing within an opening to improve insulating value and/or reduce sound
transmission
Double
Low Headroom Track:
See Double Track
Low Headroom
Double
Shaft:
Double torsion spring shaft
used when additional space is required to accommodate counterbalance spring
lengths
Double
Strength Glass:
A grade of window
glass lighter than plate glass and usually 1/8” thick
Double
Thick Glass:
See Double Strength
Glass
Double Top
Roller Fixture:
Fixture used at the
top section consisting of two top brackets to incorporate a longer roller
shaft. Usually requires double end stiles on top section
Double
Track Low Headroom:
Addition of
second pair of horizontal tracks to reduce the high point of travel of top
section and permit door being mounted in area with minimum headroom facilities
Dowel: Wooden pin for fastening wood usually glued in between
stiles and rails to strengthen a joint
Drawbar
Operator:
Electric operator which mounts
above the door in the horizontal position and lifts door by pulling and pushing
the top section. For normal headroom and low headroom doors
Drip
Cap:
A projection over the head of a
door opening, or on the top of a wall, to throw water clear of the building
Drip
Lap:
An angled weather seal provided
between sections on steel doors in lieu of a rabbeted joint to prevent entrance
of the elements
Driveway
Post:
Post mounted adjacent to a
residential driveway to provide exterior location for key switch to actuate an
automatic door operator.
Drop-Off
Weight:
See Counterweight
DSB: Acronym for Double Strength Grade B Glass
Duplex
Spring:
A combination of two torsion
springs of different diameters telescoped within spring fittings
Eased
Edge:
Rounded and sanded meeting rail
edge
Eased
Off:
See Eased Edge
Eave
Height:
Height measured from the
floor to the underside of an eave
Edge
Grain:
Wood in which the rings form
an angle of 45 degrees or more with the surface of the pieces
Edge
Hinge:
See Graduated Edge Hinge
Electric
Opener:
See Electric Operator
Electric
Operator:
An electrically-powered
device to control the opening and closing of a door
Electrical
Interlock:
Interlock to prevent door
operation by an electric operator under certain conditions
Embossed
Door Section:
Door section featuring
embossed panels
Embossed
Panel:
Panel containing surfaces
raised in relief from a flat surface
Embossed
Rosette:
Special ornament or design
accessory made of wood, hardboard or aluminum with designs raised in relief
from the surface
Embossed
Section:
See Embossed Door Section
Embossed
Steel Door Section:
See Embossed Door
Section
End
Bearing Plate:
Plate commonly used on
torsion spring counterbalance units, which includes a ball bearing to support
radial movement of a torsion shaft at each end
End
Bearing Support:
See End Bearing
Plate
End
Bracket:
See End Bearing Plate
End
Hinge:
See Graduated Edge Hinge
End
Roller Hinge:
See Graduated Edge
Hinge
End
Stile:
Stile located at each end of a
door section which provides for attachment of graduated edge hinges
End
Stile Lock:
See Inside Lock
End
Stile Sealing Strip:
Foamed plastic
strip to seal sections at end stiles of steel and fiberglass doors
Escutcheon:
A plate surrounding the lock
mechanism on outside of door
Exhaust
Port:
Opening in bottom section to
accept hose to vent tailpipe exhaust
Extension Spring: Provides power or tension by stretching or
pulling, and is usually mounted along the horizontal section of track extending
from front of door opening to the back hang
Exterior Lock: Keyed lock on exterior of the door
Extrusion: Fabricated shapes made by forcing hot aluminum,
or plastic, billets through a die in an extrusion press
False Louver Molding: Special angular shaped molding that gives an
appearance of a slatted panel when fitted together
Faux Divided Lite: One piece of glass divided by muntons to appear as several lites.
Ferrule: Metal ring or cap which is affixed to a cable by
compressing so as to form a button or loop on the end of the cable
Finger Joint: Joint used in joining lumber together at ends of
lumber pieces
Finish Moulding: See Stop Mould
Finished Door Opening: See Daylight Opening
Finished Opening: See Daylight Opening
Fire Station Release: See Automatic Opening Device
Flag: See Jamb Angle
Flag Angle: See Jamb Angle
Flag Bracket: See Jamb Angle
Flame Spread Index: A measurement of horizontal flame spread across
a product specimen under controlled laboratory conditions; the product is
compared to the performances of red oak, which is standardized to 100, and
gypsum board, which is standardized to zero
Flipper: See Automatic Latch
Floor Seal: See Bottom Weatherseal
Floor Step: See Rain Stop
Flush Design: See Flush Door
Flush Door: Door comprised of sections unbroken by visible
rails and stiles where the facing of the entire door presents an even surface
Follow Roof-Line Hardware: See Contour Track
Follow-the-Roof
Pitch:
See Contour Track
Follow-the-Roof
Track:
See Contour Track
Front
Mounted Low Headroom:
Low headroom
hardware where springs mount on torsion shaft above opening
Front-Mounted
Spring:
A counterbalance spring that
is mounted to the header above the door
Full
Vertical Lift:
See Vertical Lift
Full
View Section
, Full Vision Section (A
totally glazed section with various types of glass or clear plastic. Section
formed of aluminum extrusions which will marry with steel or aluminum sections
above and below)
Full
Vision Section:
See Full View Section
Galvanizing:
Zinc coating to protect steel against
corrosion
Garage
Door Opener:
See Operator
Garage
Door Operator:
See Operator
Gauge: U.S. Standard, established by congress in 1893,
specifying that weight per square foot would be indicated by a numbering
system; larger numbers indicate smaller thicknesses and vice versa
Glazed:
Fitted with panes of glass or clear
plastic
Glazing
Lite:
See Vision Lite
Glazing
Strip:
Extruded plastic or rubber
strips that fit against glazing and window frame to resist water infiltration
Graduated
Edge Hinge:
Hinge placed on edge of
door sections allowing sections to pivot as door opens and closes. Hinges hold
track roller and are graduated and numbered for correct placement to ensure
flush fit of door against jambs when closed
Grease
Packet:
Lubricant enclosed in a small
packet
Grille:
Insert within a window, designed to
give the appearance of divided lites
Guard
Angle:
See Track Guard
Gusset:
Cast, extruded, stamped, or rolled
aluminum corner reinforcement which is fastened in corners to stiffen joints or
corners
Gusset
Plate:
Hardware fastened to door
header to help support the track assembly and spring assembly
Hang
Down:
The amount of the door that
hangs down from the door opening when the door is in the open position
Hanging
Iron:
See Angle Iron
H-Column
Jamb:
Separation of two door openings
where door track is to be mounted directly to H-Column
Header:
See Door Header
Header
Seal:
See Top Seal
Headplate:
The supporting plate for the lifting
drum located in line with the outer edge of the door
Headroom:
Vertical clear space required inside
above the door opening, and below the lowest ceiling obstruction, required for
proper operation of the door and its hardware
Heliarc
Weld:
A type of inert gas-shielded
arc welding employing helium or argon
High
Arc:
See Trajectory
High
Cycle Spring:
Counterbalance springs
with increased cycle life capability for high usage doors
High
Lift:
Distance from header to
underside of horizontal track, when high lift track is required
High
Lift Drum:
A cable drum contoured to balance
a high lift door
High
Lift Track:
Track and hardware that
causes the door to rise vertically some distance above the top of the door
opening before it levels out into a horizontal position
High
Moment Arm:
Radius of a cable drum,
including cable, at point of cable peel off from the drum
High
Trajectory:
See Trajectory
Hi-Lift:
See High Lift
Hi-Lift
Track:
See High Lift Track
Hinge: Hardware item that joins door sections together, and
allows sections to pivot independent of each other
Hinge
Support Plate:
Plate used to support
the hinge mounting area, i.e. a backup plate
Hinge
Tube:
Tube used to connect two hinge
leafs together
Hoist
Electric Operator:
Similar to a
jackshaft-type operator but with an auxiliary emergency chain hoist in case of
a power failure
Horizontal
Angle:
See Horizontal Track Angle
Horizontal
Radius:
Section of track that
transitions from vertical to horizontal track welded, bolted or riveted to the
horizontal track and then bolted to the flag angle
Horizontal
Reinforcing Angle:
See Horizontal
Track Angle
Horizontal
Rise:
The upward slope of the
horizontal track which helps to start the door downward and helps maintain
cable tension
Horizontal
Track:
Track used in the horizontal
segment of a track assembly
Horizontal
Track Angle:
An “L” shaped angle
affixed to the horizontal track to stiffen it
Horizontal
Track Assembly:
An assembly made up
of horizontal track and reinforced with an angle that is used to both guide and
support the door in the horizontal position
Horizontal
Track Radius:
See Horizontal Radius
Hot Off
The Floor:
Condition where the door
has a tendency to lift off the floor
Inch-Pounds:
English unit of measurement of torque
Inclined
Track:
Tapered spacing of the
vertical track away from the jamb, permitting weathertight closing of door
against jamb and easy release for opening door by eliminating friction
Inside
Hook Up:
Connection where the
counterbalance cable is on the inside of the track, between the door sections
and the vertical track
Inside
Hook Up Bottom Bracket:
Bottom corner
bracket where the cable is routed between the vertical track and the door
sections
Inside
Lock:
Spring loaded, sliding deadbolt
lock or spring latch operable only from interior of the door
Installation:
Placing a door in position for use
Installer:
Person placing the door in position
for use
Insulated
Door:
Door sections containing
insulating material
Insulating
Glass:
Multi-pane glass assembly
containing air space between panes for insulation
Insulation:
Material having ability to reduce
heat or cold transmission
Interior
Lock:
See Inside Lock
Intermediate
Hinge
: See Center Hinge
IPPT: Acronyn for Inch-Pounds Per Turn; torque rate of a
spring, indicating the number of inch-pounds of torque delivered to a shaft for
each turn the spring is wound
ISLO: Acronym for “inside looking out”
Jackshaft-Type
Operator:
Operator which is mounted
on wall or ceiling, with drive provided to turn a torsion shaft
Jamb:
See Door Jamb
Jamb
Angle:
See Angle Mounted Track
Jamb
Bracket:
“L” shaped bracket used to
connect the vertical track to the door jamb
Jamb
Extension:
Framing extensions of door
jambs above opening height; required to support door track and spring
assemblies
Jamb
Guard:
See Track Guard
Jamb
Seal:
See Stop Mould
Joint,
Rabbeted:
See Joint Shiplap
Joint,
Shiplap:
A raised back portion of a
section joint, fitting with a lowered front portion of a section joint, to
create a weathertight seal between door sections
Joint,
Tongue-and-Groove:
A joint with an
interior raised portion, fitting with a joint with an interior lowered portion,
to create a weathertight seal between door sections
Joint
Bracket:
See Splice Jamb Bracket
Joint
Seal:
See Section Joint Meeting Rail
Seal
Keeper
Plate:
See Striker Plate
Key: A square piece of steel that slides into a key way to
prevent parts from rotating on a shaft
Key
Alike:
See Keyed-Alike
Key
Switch Control:
Use of key switch to
actuate a door operator in place of or in addition to a push-button or
transmitter
Key
Way:
A groove, milled into an object,
which when used with a key will prevent parts from rotating on a shaft
Keyed-Alike:
Two or more lock cylinders intended
to be opened with the same key
Keyed
Shaft:
A shaft that has an integrated
key way
K-Value:
Laboratory-determined value of
thermal conductance of a material
“L”
Strut:
See Strut
Lag
Screw:
A heavy wood screw with a
square or hex head and a coarse thread
Lap
Jamb:
Condition where door sections
lap the door opening on each jamb
Lapped
Joint:
See Joint, Shiplap
Latch
Lock:
See Automatic Latch
Lateral
Force:
Force applied from or toward
the side
Lift
Bracket:
See Bottom Corner Bracket
Lift
Clearance:
See High Lift
Lift
Clearance Track:
See High Lift Track
Lift
Handle:
Handle for manually operating
a sectional door
Lift
Plate:
See Step/Lift Plate
Lintel:
Beam provided over an opening to
carry wall and/or roof loads over an opening
Lite: See Vision Lite
Lock: Device to secure door to vertical track(s) in the
closed position
Lock
Bar with Cremone:
Rotating the
cremone or lock bar disc from outside or inside will force lock bars into
cut-outs in track to lock door
Lock-On
Bottom Roller Bracket:
See Bottom
Corner Bracket
Lock
Strike:
See Striker Plate
Long-Stem
Roller:
Roller with a shaft length of
7 inches or longer
Louver:
An opening with slats or screening
for ventilation
Low
Headroom Hardware:
See Low Lift
Hardware
Low
Lift Hardware:
Low headroom
accessories which enable a door system to operate in minimal headroom
conditions
Low
Moment Arm:
Smallest radius, or
distance from the shaft axis, to the center of the cable that regards cable
peel off point on cable drums
LSLO: Acronym for left side looking out
Lubricant:
A substance used to lubricate
Lubricate:
To make a surface smooth or slippery;
to reduce friction
Maintenance:
The act of keeping a door system in
good working condition
Master
Keyed:
See Master Keying
Master
Keying:
Arrangement whereby cylinder
locks, although fitted with different keyed cylinders, can be opened or locked
by means of one master key
Meeting
Rail:
The top horizontal rail or
bottom horizontal rail of any section that meets and joins to form a
weatherproof seal
Metallurgist
Report:
A report or document that
describes the composition of a metal
Mill
Certification:
A report or document
from the producing mill that provides all pertinent data relative to the
composition, structure, heat, etc. of a given metal
Minimum
Headroom:
See Headroom
Minimum
Sideroom
: See Sideroom
MIP: Acronym for Maximum Inch-Pounds; (IPPT x Turns = MIP);
Used to describe the total torque required on a shaft to raise a given door
weight from the floor, and also is the measurement of the torque capacity of a
particular wire size at a desired cycle level of operation
Modular
Coordination:
The dimensioning of
building units so that they will fit together, and the use of building
dimensions consistent with such coordinated sizes.
Mounting
Plate:
Flat steel or wood member
placed on the wall to accommodate spring supports, spring shaft bearings, chain
hoists and mounting for operators
Movable
Post:
Post designed to allow the use
of two or more doors in a single opening with carry-away aluminum center posts
that can be removed when doors are in up position.
Mullion, Garage Door: A vertical post used as a door reinforcement
Mullion, Window: Framing member forming a divide between units of a window
Muntin:
A bar member supporting and
separating panes of glass within a sash or door
Munton, Window: Munton that defines a faux divided lite.
Mutt: See Stile
Neoprene:
A synthetic rubber made by
polymerizing chloroprene
Nicopress
Sleeve:
A two-hole aluminum or copper
sleeve through which cable is passed. Swaging will upset the sleeve to form a
loop at cable end
Normal
Headroom:
See Headroom
Normal
Sideroom:
See Sideroom
Numbered
Hinge:
See Graduated Edge Hinge
Numbered
Panel:
Area between stiles I.S.L.O.
numbered left to right
Numbered
Roller Bracket:
See Graduated Edge
Hinge
Numbered
Section:
See Door Section
Nylon
Center Bearing:
See Bushing
Oil: See Lubricant
Oil-Canning:
A slight buckling in sheet metal,
causing the appearance of waviness or unevenness
Opener:
See Operator
Opening
Height:
Distance from floor to the
bottom of header
Opening
Size:
See Daylight Opening
Opening
Width:
Distance between jambs of the
door opening
Operator:
Electric device used to control the
up and down motion of the door
Outside
Hook Up:
Connection where the
counterbalance cable is on the outside of the tracks
Outside
Hook-Up Bottom Bracket:
Bottom corner
bracket where the cable is routed outside the tracks
Outside
Pull:
See Outside Hook Up
Overlay:
Decorative ornaments of metal, wood
or hardboard used for outside decoration of garage door sections
Pan
Door:
A garage door composed of sheet
metal door sections
Panel: A raised and decorative design on door sections
Pass
Door:
A swinging pedestrian door
built into a sectional door. Not recognized as an exit door by model codes
Pedestrian
Door:
Access door adjacent to upward
acting doors. Used as a legal means of egress to avoid the use of a sectional
door
Perforated
Angle:
Angled metal with a serried of
punched holes used to hang garage doors and operators
Perimeter
Seal:
Weatherstrip installed at the
perimeter of a garage door
Pinch
Resistant:
Term for a door that has
been designed to prevent entrapping, crushing, breaking, severing or
dislocating a person’s finger
Plastic
Muntin:
See Muntin
Pocket
Wheel:
A wheel or drum machined to
receive the individual links of a chain; used to directly transmit power
Polyurethane: A
type of foam insulation commonly foamed in place by manufacturers of garage
door sections
Pop
Rivet:
See Blind Rivet
Pounds
Pull:
Unit of force determined by
dividing the torque by the moment arm of the drum
Power
Unit:
A complete torsion spring
assembly consisting of springs, shaft, winding plugs and stationary cones,
drums and cables
Pre-Finished:
Finish characterized by galvanized
steel painted with a primer, then given an oven-baked top coat
Pre-Painted:
See Pre-Finished
Prime: To lay on the first coat of primer paint
Prime-Painted:
Coated with primer paint
Pull
Down Rope:
A rope connected to the
bottom bracket; used to manually pull the door down
Pull
Rope:
See Pull Down Rope
Pull
Type Spring:
See Extension Spring
Pulley:
A wheel turning around an axis and
having a groove on its rim in which runs a cable, chain, or rope
Pulley
Clevis:
See Sheave Fork
Punched
Angle:
See Angle Iron
Punched
Angle Brace:
See Angle Brace
Punched
Angle Iron:
See Angle Iron
Punched
Angle Track Hanger:
See Back Hang
Purlin:
A horizontal roof member spanning
between beams and trusses to which roofing is attached; commonly used in a
pre-engineered, industrial type building
Push
Down Spring:
Spring-activated push
rods mounted on horizontal tracks to start door down during closing portion of
door cycle; generally used with a jackshaft-type operator or a manual chain
hoist
Pusher
Bumper:
A leaf spring in place of a
rod
Push
Nut:
Stamped metal fastener designed
to be pushed onto a shaft to secure an assembly
Quarter
Grain:
See Edge Grain
Quarter
Round:
Molding showing a quarter
circle in its cross section
Quarter
Turn:
A unit of turn measurement when
winding tension into a torsion spring
Quick
Turn Bracket:
See Low Lift Hardware
Radial
Force:
A force generated from the
center of an object toward the outside
Radius:
See Horizontal Radius
Radius
Track:
See Horizontal Radius
Rail: Horizontal member of a section
Rain
Ledge:
See Rain Stop
Rain
Stop:
Ledge provided at the point
where the bottom rail meets the floor to prevent water from running under the
door and allowing for runoff of the water onto the drive or approach
Raised
Panel:
See Panel
Rate of
Rise:
Measurement of change per
revolution of a drum's moment arm
Rear
Mount:
When the counterbalance system
attached to the rear of the horizontal tracks
Rear-Mounted
Torsion:
See Rear Mount
Rear
Track Hanger:
See Back Hang
Red: Indicates color for Left Side, Right Wound
Regular
Angle Mount:
See Angle Mounted Track
Removable
Center Post:
Post/track assembly
which substitutes for door jamb in wide door openings so that multiple doors
may be used instead of a single large door, and which can be released and
carried from an opening
Removable
Jamb Wall:
Wall designed to allow the
use of two or more doors in a single opening with carry-away aluminum center
posts that can be removed when doors are in up position
Removable
Mullion:
See Removable Center Post
Removable
Post:
See Removable Center Post
Residential:
A sectional overhead type door which is
intended for use in a residential garage, and normally operated less than 1,500
cycles per year
Restraining
Cable:
See Containment Cable
Return:
See Sideroom
Reverse
Angle:
See Reverse Angle Mount
Reverse
Angle Mount:
An “L” shaped angle with
the wall leg toward the door opening used to connect the vertical track to the
jamb. Used in low headroom and sideroom restricted garages as well as lap
joint.
Rigid
Strut:
See Strut
Rigid
Truss:
See Strut
Roll-Away
Post:
See Removable Center Post
Roller:
See Track Roller
Roller
Assembly:
See Track Roller
Roller
Bracket:
A device that is mounted to
a door section and holds a track roller
Roller
Stem:
See Track Roller
Rounded
Off:
See Eased Edge
RSLO: Acronym for “right side looking out”
R-Value:
Thermal resistance value; inverse of
U-Value
Safety
Bottom Bracket:
See Broken Cable
Device
Safety
Bottom Corner Bracket:
See Broken
Cable Device
Safety
Bottom Fixture:
See Broken Cable
Device
Safety
Cable:
See Containment Cable
Safety
Spring Containment:
See Containment
Cable
Safety
Spring Containment Kit:
See
Containment Cable
Sash: The framework which holds the glass in a window or
door
Sash
Muntin:
One of the rabbeted bars into
which glass is fitted in a sash containing two or more lights
SC: Door opening size designation, denoting “single car”
Scarf
Joint:
Method of joining pieces of
lumber together by gluing and pinning with wood dowels
Scribing:
Cutting a door bottom rail to match
the contour of the floor
Scutcheon:
See Escutcheon
Section:
Garage door component that extends
the full width of an opening; usually joined together by hinges
Section Joint Meeting Rail
Seal:
A weather seal between door
sections
Section Joint Meeting Rail
Type Seal:
See Section Joint Meeting
Rail Seal
Sectional Door: See Sectional-Type Door
Sectional-Type Door: Door made of two or more horizontal sections
hinged together so as to provide a door capable of closing the entire opening
and which is by means of tracks and track rollers
Servicing: See Maintenance
SG: Refers to “single glazed”
Shaft Bearing: A bearing that is used to maintain torsion shaft
alignment and reduce friction
Sheave: A metal or plastic pulley that is designed to
guide the cables employed in a counterbalance system
Sheave Fork: A yoke type device used to attach the sheave to
extension springs
Shiplap Section Joint: Section joint interface that steps up from one level to a second
level from the front of the door to the back of the door
Shoe Molding: See Quarter Round
S-Hook: Hardware device used to connect an extension
spring to a pulley. These are also used with other door related hardware (i.e.
chain on locks)
Shop Drawings: Drawings provided by the manufacturer or door
supplier to the architect-engineer showing the plans, sections, elevations, and
details of the work required, submitted to assure proper interpretation of the
intent of the architectural drawings
Side Bearing Plate: See End Bearing Plate
Side Seal: See Stop Mould
Sideroom: A horizontal measurement from each side of the
door opening, outward to the nearest obstruction
Single Door: Commonly
used to refer to smaller width doors used on one car openings
Single Strength Glass: See Single Thick Glass
Single Thick Glass: A type of sheet glass used in glazing sashes
Slant: The pitch of a roof
Smile: See Bow
Snap Latch: See Automatic Latch
Solar Glass: A type of tinted glass
Solid Rail: A rail
made with one continuous piece of lumber without finger joints
Special
Door:
Non-standard door which must be
custom manufactured and/or specified
Specifications:
A detailed statement of the quantity
and type of material to be used in the construction of a garage door system
Splice
Plate:
Plate used for attachment of
track at the junction of tracks in clip type angle mounted track
Spring
Anchor:
See Center Bearing Bracket
Spring
Anchor Bracket:
See Center Bearing
Bracket
Spring
Anchor Cone:
See Stationary Cone
Spring
Anchor Plate:
See Center Bearing
Bracket
Spring
Assembly:
See Torsion Spring Assembly
Spring
Assembly Closed Wound:
A coiled
torsion spring with no gaps between the coils
Spring
Assembly Open Wound:
A coiled torsion
spring with equal gaps between each coil
Spring
Balance:
The amount of turns needed
to counterbalance the weight of the garage door
Spring
Bumper:
Spring mechanism mounted on
horizontal track that eases the door to stop in its upward travel to reduce
shock and prevent pull down rope breakage. Can be made from leaf springs or
tension rods.
Spring
Constant:
Mathematically developed
number from basic spring wire formulas, that applies to any specific wire size
and coil diameter combination; used to determine the number of active coils a
spring must contain
Spring
Containment Device:
See Containment
Cable
Spring
Fitting:
A plug or cone used to adapt
the torsion springs to the torsion shaft and/or center bearing bracket. One
piece is a stationary cone while the other fitting is a winding plug
Spring
Hook:
See S-Hook
Spring
Latch Lock:
See Automatic Latch
Spring
Pad:
Pad installed on header above
the door to anchor the center bearing bracket. Can be mounted in various
locations, not necessarily in center, depending on size of springs
Spring
Plug:
See Spring Fitting
Spring
Retainer:
See Spring Fitting
Spring
Winding Cone:
See Winding Plug
Square
Key:
See Key
Standard
Headroom:
See Headroom
Standard
Sideroom:
See Sideroom
Stationary
Bearing Retainer:
See Stationary Cone
Stationary
Cone:
Part that fits into the end of
a torsion spring permitting the spring to be fixed to the center bearing
bracket. May also incorporate a retainer for a ball bearing or bushing
Stationary
Plug:
See Stationary Cone
Stationary
Sleeve:
See Stationary Cone
Stationary
Spring Cone:
See Stationary Cone
Steel
Jamb:
Door framing made from either
channel or angle iron
Steel
Jamb Mounted:
A track system intended
for mounting to a steel jamb
Steel
Pin:
Short, headless pointed nail
driven through the dowel and rail in doors for greater security
Step
Down Plate:
A means of closing a
sectional door the last few inches of its travel
Step/Lift
Plate:
A part that can be used as a
step down plate and a lift handle for manually operating a sectional door
Sticker:
See Decal
Stile: Vertical reinforcement member of a section
Stock
Door:
Door made to standard size and
generally kept in inventory at either distributor or factory warehouse
Stop: See Stop Mould
Stop
Mould:
Serves to seal the perimeter
of the door against weather and light infiltration; usually nailed to the jamb,
outside the door
Stop
Moulding:
See Stop Mould
Stress:
The amount of work required of a
spring at a desired cycle level
Stretch
Spring:
See Extension Spring
Strike:
See Striker Plate
Striker:
See Striker Plate
Striker
Plate:
A plate used in conjunction
with a locking system to secure a lock mechanism
Strut: Support stiffener to reduce deflection of the door
sections in the horizontal position. Also, to increase windload capability of a
door
Sway
Brace:
See Angle Brace
Sway
Strap:
See Angle Brace
Sweep: See Trajectory
Swing-Away
Post:
A type of removable center post
that remains attached at the top and can be pivoted out of the way
Swing-Up
Post:
See Swing-Away Post
T
Handle:
A handle in the shape of a
“T”
T Lock
Handle:
See T Handle
Tapered
Vertical Track:
See Inclined Track
TC: A designation of door opening size indicating an
opening for two cars
Template:
A pattern used as guide to shape
something or show hole drilling locations. Also a short header to support a
beam in a wall
Test
Load:
See Test Wind Load
Test
Wind Load:
Specified difference in
static air pressure (positive or negative), equal to a specified percentage
greater than or equal to 100% of the design load
Thermal
Barrier:
See Thermal Break
Thermal
Break:
The separation between the
outer and inner surfaces of a door section
Thermal
Seal:
See Bottom Weatherseal
Tin-Canning:
See Oil-Canning
Tog-L-Loc:
Method of mechanically securing two
pieces of steel together without welding, riveting or bolting
Tongue and Groove Section Joint: Section joint interface commonly composed of a middle
protrusion on a garage door section edge mating with a middle groove on an
abutting section edge
Tongue and Groove Board: Vertical wood planks that when laid out side-by-side
resembles wainscoting.
Top
Carrier:
See Top Fixture
Top
Fixture:
A bracket for positioning
the top guide roller on the top section of a door
Top
Header Seal:
See Top Seal
Top
Rail:
Horizontal rail forming the top
of a door as distinguished from the meeting rails and bottom rail
Top
Roller Bracket:
See Top Fixture
Top
Roller Fixture:
See Top Fixture
Top
Seal:
Weatherstripping which fastens
to the top of the door to seal the door along the top of the opening
Torque:
The twisting force around an axis
Torque
Bar:
See Torsion Shaft
Torsion:
Act of twisting or turning of a
torsion spring by the exertion of forces tending to turn one end about a
longitudinal axis while the other end is held stationary
Torsion
Bar:
A long metal bar that transfers
torque from a spring to a winding plug
Torsion
Shaft:
A shaft that transfers torque
from springs to load
Torsion
Spring:
A spring that works in the
manner of twisting one end or part about a longitudinal axis while the other
end is held or turned in the opposite direction developing torque
Torsion
Spring Assembly:
Hardware used to
make up door counterbalance assembly
Torsion
Spring Counterbalance Assembly:
See
Torsion Spring Assembly
Torsion
Tube:
See Torsion Shaft
Torsion
Tube Coupler:
See Coupler
Track: Channel shaped metal bars or rails in which upward
acting doors operate via track rollers
Track
Bracket:
A fixture, connected to a
track, which is designed for the track to be mounted to the jamb
Track
Clip:
A metal plate used to attach
tract to wall angle
Track
Graduation:
The differential distance
from the track to the door jamb, measured at the top and bottom of the vertical
track
Track
Guard:
Added protection for back of
vertical track recommended in cases where powered material handling fork trucks
and similar equipment may be operating in the area.
Track
Hanger Kit:
See Back Hang
Track
Radius:
See Horizontal Radius
Track
Roller:
Roller assembly for guiding
the door sections along track
Trajectory:
The arc of travel or sweep of the top
section as the door is raised from closed to open position
Translucent
Door:
Door that allows the passage of
light without being transparent
Transom
Bar:
A horizontal crossbar in a
window, over a door, or between a door and a window or fanlight
Transom
Section:
An extra section above a
garage door opening sometimes used to allow extra lift of the horizontal tracks
to accommodate a trolley type operator
Trim: The finishing materials; such as the lock and handles
on the door
Triplex
Spring:
Three springs of increasing
diameter assembled one inside another using special spring fittings
Trolley
Opener:
See Drawbar Operator
Trolley
Type Operator:
See Drawbar Operator
True Divided Lite: A window composed of several smaller windows separated from each other
by window mullions
Truss: See Strut
Truss
Bar:
See Strut
Tubular
Shaft:
A hollow shaft
Turn: A 360-degree revolution of a component about its axis
Turns
On Spring:
See Winds On Spring
Twist: A form of warp caused by the twisting or winding of
the edges of a rail
U-Bar: See Strut
U-Bar
Stiffener:
See Strut
U-Bar
Truss:
See Strut
Urethane (Finish): A clear finish commonly used as a top layer to finish wood
Urethane (Insulation): See Polyurethane
“U”
Strut:
See Strut
U-Value:
Thermal transmission coefficient
which is a measurement of heat, in BTU's, transmitted through one square foot
of material (the door) in one hour at a temperature difference of 1 degree from
one side to the other
Upper
Trajectory:
See Trajectory
Upper
Vertical Track:
Upper track assembly
on a vertical lift door
Varnish:
Glossy clear top coat used on
finished wood; may not be suitable for outdoor wood applications for its lack
of breathability
Vent: An opening located in the bottom section of a door for
ventilation
Vertical
Grain:
See Edge Grain
Vertical
Lift:
Refers to a hardware design
that causes doors to open vertically where no horizontal tracks are required
Vertical
Lift Drum:
A cable drum with changing
radius grooves to negate spring tension
Vertical
Post:
A vertical reinforcement
sometimes installed for high wind events
Vertical
Splice Angle:
See Jamb Angle
Vertical
Track:
The portion of track that is
oriented vertically and is adjacent to the jamb
Vertical
Track Assembly:
An assembly made up
of a piece of vertical track and a piece of continuous angle or jamb brackets
used to secure the track to the jamb.
Vision
Lite:
Glazing that is mounted in a
door
Warning
Tag:
A tag with warnings and/or
instructions for safe operation
Water
Seal:
A coating of some kind used to
prevent the absorption of water
Water
Stop:
See Rain Stop
Weather
Joint:
See Weatherstrip
Weatherseal:
See Weatherstrip
Weatherstrip:
Material used at the perimeter of a
garage door, or between joints of a garage door, intended to improve a door’s
performance against air infiltration and thermal transmission
Wedge
Connection:
A device composed of a
steel wedge and clip for securing the joint between vertical and horizontal
track sections
West
Coast Lumber:
Lumber produced on the
West Coast, generally used in manufacturing wood sectional garage doors
Wheel
and Axle:
See Track Roller
Wicket
Door:
See Pass Door
Wind
Load:
See Design Wind Load
Winding
Bar:
See Winding Rod
Winding
Cone:
Part that fits into a torsion
spring permitting winding and tension adjustment
Winding
Cone Set Screw:
See Winding Plug Set
Screw
Winding
Cone Socket Head Set Screw:
See
Winding Plug Set Screw
Winding
Plug:
See Winding Cone
Winding
Plug Set Screw:
Set screw fasteners
used to lock the winding plug to the torsion shaft
Winding
Rod:
A solid rod that fits into the
socket of the winding plug to tension torsion springs
Winding
Sleeve:
See Winding Plug
Window
Lite:
See Vision Lite
Winds
On Spring:
The number of winding
turns on a torsion spring
Wire
Glass:
Glass into which wire netting
is woven prevent splintering from heat or impact
Wire
Rope:
See Aircraft-Type Cable
Wire
Size:
The diameter of the wire in a
spring
Wood
Anchor Pad:
See Spring Pad
Wood
Casing:
See Wood Jamb
Wood Grain: Direction
or orientation of the wood, as seen in a piece of lumber
Wood
Jamb:
Upright wood piece forming the
side of an opening
Wood
Jamb Mounted:
Refers to mounting
vertical track to wood jambs
Woodruff
Key:
Special half-moon shaped steel
key
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