Angle Mounted Track
A method of fastening vertical track to a doorjamb using a full height continuous angle. (Commercial garage door application)
An electrolytic method of coating aluminum with a protective or decorative film, which is generally clear in color.
Acronym for American Society of Heating, Refrigeration, and Air Conditioning Engineers.
Weather-stripping added to bottom section of the garage door to seal the opening along the floor.
The vertical supports for the horizontal track, cross-braced to prevent lateral movement and track spread.
The required clearance from the face of the header to any obstruction to the rear of the horizontal track.
A metal, vinyl or rubber strip used to secure glass around the periphery of a pane. (Commercial garage door application)
A structural support located on the bottom section of the garage door that provides for attachment of the lifting cables on the sectional garage doors. Also referred to as "Bottom Corner Bracket." (Note: Track rollers may have a separate door attachment in some garage door designs.)
Bracket Mounted Track
A method of fastening vertical track to a doorjamb using angle brackets. Also referred to as "Mounted or Track Bracket."
Vertical track assembly that steps back from the jamb used for high lift and vertical lift track to permit outside lock handle projection to clear the lintel. (Commercial garage door application)
A leaf spring installed at the end of the horizontal track. Especially useful on lift clearance or full vertical manually operated garage doors, acting as a cushion and stop. (Commercial garage door application)
Grooved drums on the torsion spring shaft that lifting cables wind around when the garage door opens. Designed to allow cable to be accumulated or dispensed in an orderly manner and to prevent lapping or cable chafing.
Cable Safety Device
A safety bottom fixture specifically designed to prevent a garage door from falling if a cable breaks.
A manufactured device used to form a loop of cable, the size of which is determined by the cable diameter.
A swagged fitting at the end of the cable to prevent slippage through a slot in a drum.
Multistrand wire used to attach the garage door, via bottom brackets, to the counterbalance mechanism.
See "Removable Post." (Commercial garage door application)
Center Bearing Plate
See "Center Support Bearing."
Flat hinge located on all intermediate stiles to allow for garage door sections to turn the track radius as the door opens.
Center Lift Cable
Additional cable assembly, which is secured to the outside of the garage door at points toward the center of the door. Used to provide extra lifting support for extremely wide or heavy doors. (Commercial garage door application)
See "Mullion." (Commercial garage door application)
Vertical members of a garage door section that provide structural rigidity and location for center hinge attachment. (Commercial garage door application)
Center Support Bearing
Bearing and mounting plate installed at approximately half the door width above the garage door, which acts as a support for the spring shaft. Can be mounted in various locations, not necessarily in the center, depending on size of the springs.
Adds mechanical advantage to manually-operated garage doors. Couples to one end of the solid torsion shaft. (Commercial garage door application)
The amount of sideroom, headroom, and backroom required to properly install a sectional garage door.
Adjustable two-part cast iron connector for torsion solid shafts on wide garage doors. Eases installation and allows adjustment in cable lengths so that doors will operate smoothly without cocking.
The part of the sheet door that actually rolls up and down or slides side to side. Manufactured of corrugated sheets seamed together.
One complete cycle of begins with the garage door in the closed position. The door is then opened and closed again. Note: Torsion spring operated garage doors with higher-than-normal cycle life requirements may be specified with 25,000, 50,000, or 100,000 cycle springs.
A static-applied load. A load without movement.
The frame into which the garage door fits, consisting of a door header and two upright members called doorjambs.
Always specify the width first and the height second: for instance 8' 6" (2591 mm) wide by 7' 3" (2210 mm) high. Refer to "Opening Size."
Lighter than plate glass, about 1/8" (3.18 mm) thick, often termed double-strength glass. See "Glass Type."
Circular stamped metal parts attached at various locations along the tubular shaft that allows the sheet door curtain to coil up when the garage door opens.
A combination of two torsion springs.
Stile located at each end of a garage door section that provides for attachment of end hinges.
A plate surrounding the lock mechanism that acts as a bearing surface for the lock shaft; one of the parts of a lock set, usually held in place by small screws known as escutcheon screws.
Orifices put in the bottom section of a garage door for release of carbon monoxide fumes when tubed from an automobile exhaust system. (Commercial garage door application)
Counterbalance springs that provide lifting force by stretching. Commonly called stretch springs. Extension springs are mounted to each of the rear track hangers and attached to a pulley at the other end of the spring.
Keyed lock that can be operated on exterior of the garage door.
Fabricated aluminum or plastic shapes made by forcing hot aluminum or plastic billets through an extrusion press die.
L-shaped bracket used to facilitate the union between vertical and horizontal tracks.
Refers to garage door sections unbroken by roll-formed ribs. The face of the complete garage door presents an even surface.
Designed to place the back track on the roof incline, and as close as practical to the roof. Can be used with standard lift or lift clearance track. (Commercial garage door application)
Front-Mounted Low Headroom
Low headroom hardware where springs mount on torsion shaft above opening. (Commercial garage door application)
Full Vertical Track Assembly
An assembly designed from a piece of vertical track and a piece of continuous angle or jamb brackets. Used to secure the track to the jamb. (Commercial garage door application)
Full Vision Section
A totally glazed section with various types of glass or clear plastic. The section is formed of aluminum extrusions that combine with steel sections above and below. See "Glass Type." (Commercial garage door application)
Zinc coating to protect steel against corrosion.
Two pieces of glass spaced approximately 1/4" (12.7 mm) apart and hermetically sealed to form a single-glazed unit with an air space between. Heat transmission through this type of glass can be as low as half that of non-insulated glass.
Reheated to just below the melting point and suddenly cooled. When shattered it breaks into small pieces. (Commercial garage door application)
Polished or rough glass, 1/4" (6.35 mm) thick. Wire mesh is embedded within the glass so that the glass will not shatter when broken. Many types of wire patterns are available. (Commercial garage door application)
Section windows or lites in place of a steel or aluminum panel. See "Glass Type."
Structural bracket used to secure vertical and horizontal track, as well as counterbalance systems.
A measurement from the top of the garage door opening upward to the lowest building obstruction on the inside of the header wall. Use this measurement for vertical clearance all the way back to the end of the horizontal track.
High Cycle Springs
Special counterbalance springs with increased life cycle capability for high usage garage doors.
See "Lift Clearance." (Commercial garage door application.)
To make the independent sections to act as a complete garage door, the sections must be hinged together. Hinges are found on the end stiles and center stiles at the meeting rails. All hinges perform two basic functions within a garage door system: 1. They join the sections together with bolts or screws. 2. They allow the sections to break, independent of each other, as the garage door travels up and down.
Hinges on the end stiles perform two additional tasks: 1. They are designed to support the roller on which the the garage door travels. 2. They are offset to provide a flush fit to the garage door itself when in the closed position.
An assembly usually made up of a section of track and reinforced with an angle that is used to both guide and support the garage door in the horizontal position. Furnished with an integral section of curved track. See "Radius."
To slope, to slant. To follow roof pitch. (Commercial garage door application)
Tapered vertical track and a graduated height of edge hinges that assure a weathertight fit between the garage door and jamb.
Spring loaded, sliding deadbolt lock operable only from the interior of the garage door.
Material that has the ability to reduce heat or cold transmission.
BTU Amount of heat necessary to raise the temperature of one pound of water, one degree Fahrenheit.
K-value (Thermal Conductivity) Laboratory-determined value of the thermal conductance of a material.
R-value (Thermal Resistance) Ability of a material to retard the transmission of heat. The higher the R-value, the better the garage door insulation performance.
U-Factor (Heat Transmission Coefficient) Amount of heat, in BTU, transmitted through one square foot of material (the garage door) in one hour at a temperature difference of 1° Fahrenheit from one side to the other. The lower the U-value, the better the insulating material.
Weather-stripping attached to the garage door jamb to provide a seal along the jambs.
The upright framing on each side of the garage door opening. When wood jambs are specified, the vertical track is mounted to the inside surface of the jamb and the stop molding is nailed to the side surface within the opening. For steel garage door jambs, see "Reverse Angle Mounting." For wood or masonry jambs, see "Bracket Mounted Track" and "Angle Mounted Track."
Refers to track hardware that causes the garage door to rise vertically some distance before leveling out into a horizontal position. Also known as "High Lift Track," Lift-Clearance is the distance above the top of the garage door opening to the underside of horizontal tracks.
A handle, normally on the bottom section of the garage door, to assist in manually lifting the sectional door.
Frames glazed with glass or clear plastic. The number of panels in a section limits the quantity of lites that can be installed. May be double glazed for insulation value. See "Full Vision Section."
Track hardware accessories to improve garage door installation with minimum headroom conditions.
Arrangements whereby cylinder locks, although fitted with different keyed cylinders, can be opened or locked by one master key. In new buildings, the hardware supplier has responsibility for the lock cylinder and the locking device has to be coordinated with the hardware supplier. Cylinder may be furnished by this supplier and changed in the field. (Commercial garage door application)
The top or bottom horizontal rail in any section that meets and joins with an adjacent garage door section in horizontal rail.
Flat steel or wood members placed on the wall to accommodate spring support, spring shaft bearings, chain hoists and mountings for operators.
Movable Center Post
A lightweight extruded aluminum post/track assembly, which substitutes for the jamb between two adjacent garage doors and can be released and carried from the opening. (Commercial garage door application)
A slender dividing bar between two garage doors. Usually designed to carry horizontal (wind) load but not vertical load. (Commercial garage door application)
A bar member supporting and separating panes of glass within a sash or door.
National Electrical Manufacturers Association. Established to provide standards for electrical components. Number designation refers to motor operator and controls to meet the ambient requirements.
Frequently called daylight opening or finished opening. Dimensions are taken between masonry or wood walls or between steel jambs.
Distance between jambs of the garage door opening.
Bottom fixture with an arm that bends around vertical track to receive lifting cables. Generally used with low headroom hardware.
Refers to the wood framing at jambs and header to which the garage door track is mounted. Usually furnished by general contractor. See "Jambs."
The area between vertical stiles in a garage door section.
Sometimes called wicket door or access door. It is a small swing door built into the larger upward acting garage door allowing people to walk in and out without opening the large door. Cannot be used as a legal exit. (Commercial garage door application)
Access door adjacent to the upward acting garage doors. Avoids the use of a sectional door as a legal egress. (Commercial garage door application)
Complete weather-stripping package for sectional garage doors, consisting of astragral, jamb seal and header seal.
Vinyl or felt attached to corrugated sheet door curtain to prevent rubbing. Located at the ends or drum locations.
Joint formed by connecting rails with grooves cut out in opposing edges to permit overlapping weathertight meeting of sections. See "Shiplap Joint" and "Tongue-and-Groove."
The curved portion of the track, which allows the door to move from vertical to horizontal (and vice versa). The curve is measured in inches, thus determining headroom requirements. See "Headroom."
Rain or Water Stop
A step at the edge of the garage floor, approximately 1" (25.4 mm) higher than the outside finish. The garage door sits between the two.
Rear Track Hangers
Often constructed of punched angle iron, laterally braced, these hangers attach the end of the horizontal track to the garage ceiling. See "Back Hangs."
Designed to allow the use of two or more garage doors in a single opening with center posts that can be removed when doors are raised. Especially desirable where small openings are required normally, but occasionally the entire clear opening is necessary. (Commercial garage door application)
Reverse Angle Mounting
An exceptionally sturdy method of track mounting used on all steel jambs and wood jambs at the architect's direction. See "Angle Mounted Track." (Commercial garage door application)
The combination of a wheel and axle that is used to guide a garage door through the track system, either 2" (50.8 mm) or 3" (76.2 mm) diameter, depending on track size. Available as short or long stem.
Steel, ball-bearing wheels or nylon rolelrs that allow sections to roll freely along garage door tracks.
Right side looking out/left side looking out. Used to indicate hand of chain hoist or electric operation or lite or exhaust port location. (Commercial garage door application)
Safety Spring Containment
An extra cable used with garage door extension springs to prevent it from causing damage or injury if the spring breaks. The cable is threaded through the center of the spring and is secured on both ends of the horizontal track.
Sectional Joint Meeting Rail Seal
An integral weather-strip with the section at the joints between garage door sections.
Sectional Garage Doors
Garage doors made of two or more horizontal sections hinged together to provide a door large enough to close the entire opening. Sectional doors are guided into the horizontal or open position by a system of vertical or horizontal tracks. May be fabricated of continuous roll-formed steel with reinforcing ribs or flush sections of steel or aluminum.
Type of bearing that adequately supports the radial forces dictated by the weight of the counterbalance assembly and door weight, and the lateral forces exerted. See "Center Support Bearing."
Shafts, Tubular and Solid
A tubular or solid steel counterbalance shaft transmits the lifting force of the torsion springs to the cable drums and lifting cables.
A pulley with integral ball bearings designed to handle a cable. Used to control the movements of the cables employed in the garage door counterbalance system. Various types are stud or clevis.
The configuration of the meeting rails. When closed, the shiplap prevents rain, wind, and light from infiltrating the garage door between the door sections. See "Tongue-and-Groove."
A horizontal measurement from each side of the garage door opening outward along the wall to the nearest obstruction within the building.
Spring Anchor Plates
Designed to transmit torque from the stationary end of a torsion spring to the building structure and, at the same time, support the weight of the torsion shaft in a level attitude. The anchor plate is able to withstand the lateral forces exerted by a torsion spring. Usually supplied by the general contractor. See "Center Support Bearing."
Hardware used to make up the garage door counterbalance assembly.
Small spring-cushioning bumper attached to the horizontal track, which stops the door at the full open position. (Commercial garage door application)
The sleeves or cones that are used to affix the torsion springs to the torsion shaft. One piece is a stationary sleeve or spring retainer, and the second piece is an adjusting cone or winding sleeve.
Steel Jamb Mounting
Continuous angle attached to vertical track and fastened to the jamb by welding, self-tappers, or bolts. (Commercial garage door application)
Door framing made from either channel or angle iron.
Seals the perimeter of the garage door against weather and light infiltration. Stop molding is nailed to the jamb, outside the door, and is incorporated as one of the final steps in the installation process. Sometimes called doorstop, it is usually wooden or plastic.
Bars or brackets mounted at the top of guides to prevent bottom bar from traveling out of the guides when the sheet door curtain is fully raised. (Commercial door application)
Straight Incline Track
Vertical track assembly that extends from floor to twice the height of the opening without break-away feature. See "Break-Away Track." (Commercial garage door application)
L-shaped metal reinforcement members attached horizontally to the inside of the garage door section to add strength and rigidity. Struts are necessary on wide heavy garage doors to help prevent sagging and bowing and to provide additional reinforcement to comply with the required windloading. Also called trusses.
See "Removable Post."
The configuration of the meeting rails that differs from shiplap in having matching channel groove and protrusion on the longitudinal edges of the abutting meeting rails for wind and weather protection.
Adjustable brackets that carry track rollers mounted on the top corners of the garage door's top section.
Top Header Seal
Flat weatherstrip fastened along the full width of top door section as a seal along the header.
The horizontal rail forming the top horizontal member of a garage door as distinguished from the meeting rails and bottom rail.
Weatherstripping that fastens to the top of the garage door generatoing a seal along the top of the opening.
The turning effect of a tangential force acting at a distance from the axis of rotation or twist; torsion springs apply such effect to spring shafts.
The shaft of a torsion spring assembly that transmits the lifting force of the torsion springs to cable drums and lifting cables.
Torsion Spring Counterbalance Assembly
Designed and constructed to provide a safe and durable conversion of spring torque to lifting force by balancing the weight of a sectional overhead garage door.
Mounts above the garage door opening. The springs are manually wound, or charged, then set to a shaft that runs through the spring. The spring turns the shaft, which raises or lowers the door via the cables winding on drums.
Provides a guide for the roller wheels. The vertical track is mounted to the jambs with brackets on each side of the garage door opening. The horizontal track contains a curved end called the radius (See "Radius"). In the closed position, the garage doors rest in the vertical track. In the open position, the garage doors suspend from the horizontal track. Sectional door track usually consists of two vertical pieces and two horizontal pieces.
The arc of travel, or sweep of the top section, as the garage door is raised from closed to open position. Determining the trajectory is important when planning the location of pipes, light fixtures, etc.
A hardware design that allows a sectional garage door to open vertically along the wall above the door opening without turning back inside the building. (Commercial garage door application)
Hollow-metal pedestrian door installed adjacent to the sheet door that shares the same building opening. (Commercial garage door application)
Used by garage door installers to set initial tension on torsion springs at the winding cones.
Part that fits into a torsion spring, permitting winding of the torsion spring and tension adjustment.
Designed to safely allow the application of torque from a torsion spring. The winding sleeves' design properly retains a torsion spring when fully wound or unwound and withstands the radial and lateral forces exerted by the torsion spring.
The lateral force that the wind exerts upon a garage door as it stands in a closed position.
Wood Jamb Mounted Regular method of mounting vertical track to wood jambs.
Upright wooden piece forming the side of the garage door opening.
Roll Up Doors Glossary
Support member used to fasten torsion spring assembly of a vertical
lift door to the wall above the door opening.
Adjusting Cone (Winding Sleeve, Winding Cone)
Part that fits into torsion spring permitting winding and tension
A method of fastening vertical track to a doorjamb using a fully
adjustable continuous angle.
Weather-strip attached to the bottom of the door to seal it against
The distance from the door opening into the building to the first
obstruction at the required headroom.
The core of the roll up door which totally encloses the drums,
springs and axle. Reduces door sag, eliminates drum dents and
improves operation due to an even support of the curtain for the
Additional spring provided to compensate for weakened
counterbalance. (Usually extension spring.)
Roll formed clear acrylic coated galvanized steel, reinforced with a
1-1/2” x 1-1/2” 11 gauge full width galvanized angle that extends
fully into the guides. The PVC bulb astragal provides positive
contact with floor.
Bottom Fixture (Bottom Corner Bracket)
A structural support located on the bottom section, which hold track
rollers and provide for attachment of the lifting cables on the
Method of fastening vertical track to a doorjamb using jamb
A manufactured device used to secure two pieces of cable to each
other. Size of clamp is determined by the cable diameter.
Grooved drums fitted on torsion spring shaft onto which lifting cable
is wound when door is opened.
Cable Safety Device
A safety bottom fixture specifically designed to prevent a door from
falling in the event of cable breakage.
A lightweight extruded aluminum post/track assembly which
substitutes for door jamb in multiple door installations where a clear
span is required. Can be released and carried from opening.
Flat hinge located on all intermediate stiles to allow for section
break as door operates.
Center Lift Cable
An additional lifting cable attached to the exterior of the door to
provide support for extra wide or heavy doors.
Center Stile/Stile/Mullion/ Mutt
Vertical members of a door section which provide structural rigidity
and location for center hinge attachment.
Refers to sprocket or pocket wheel attached to shaft with chain
operation giving varying mechanical advantage in various ratios.
Special horizontal track with more than one radius used in specialty
See Bottom Fixture.
Refers to design of door mechanisms using weights instead of
springs to counterbalance door weight.
One full opening and closing operation of a sectional door.
Door and Access System Manufacturing Association. International
manufacturing trade association with 5 divisions: residential &
commercial sectional doors; rolling doors; operator & electronics;
specialty; and association division.
A coiling door barrel that remains still while the door rotates around
it. Allows for a straighter travel path of the door curtain in the
A static applied load. A load without movement.
Double Car (DC)
Door section width > 10' 1".
Double Low Headroom Track
Special horizontal track with a pair of tracks used to reduce the high
point of travel of the top section of a door to permit installation in a
low headroom application.
Double torsion spring shaft used when additional space is required
to accommodate counterbalance spring wire.
End of drum where operation of door is performed.
A combination of two torsion springs of different diameters
telescoped within common spring plugs.
Edge Hinge (Roller Hinge)
Graduated hinge, which is attached to end stile of the door sections
to carry track rollers and allows for section breaks as a garage door
Interlock to prevent door operation by electric motor under specific
Electric motorized device to control door cycling.
Electrical Operation Kit (EO Kit)
A device which equips the door for wall mounted jackshaft electric
Stile located at each end of a door section, which provides for
attachment of edge hinges. These stiles carry the total section load
and should be of superior strength to provide structural integrity.
Counterbalance springs, which provide lifting power by stretching.
Generally mounted above horizontal tracks.
Keyed lock, which can be operated on exterior of the door.
A metal ring or cap that is affixed to a cable so as to form a bottom
or loop on the end of the cable.
The size of the actual finished opening after framed and trimmed.
Garage Door Openers
Design of tapered vertical track and a graduated height of edge
hinges, which assure a weathertight, fit between door and jamb.
The steel bars which are mounted and have the door curtain fed
into when installing a door. Janus universal mount galvanized steel
guides require no pre-installation modifications for wood, steel,
concrete or masonry block applications. They are fitted with dual
polyethylene wear strips to reduce friction and muffle door noises.
Galvanized, guide mounted steel slots which prevent curtain over
travel when raising the door.
The distance above the top of the door opening to the nearest
Special plate attached to front of horizontal tracks for limited
Weather-stripping which fastens to the top of the door to seal the
door along the top of the opening.
See Lift Clearance.
High Cycle Springs
Special counterbalance springs with increased cycle lift capability for
high usage doors.
Horizontal Track Assembly
An assembly made up of a piece of track and which can be
reinforced with a piece of angle that is used to both guide and
support the door in the horizontal position.
IDA International Door Association
The dealer/installer trade association.
A horizontal track that follows the slope or slant of a building roof
Spring loaded, sliding deadbolt lock operated only from interior of
An extra layer affixed to the door steel which is a foil backed, dual
layer of heavy-duty polyethylene air-bubble insulation secured in
place with a strong adhesive and joined by mylar film to provide an
R value of 4.
Electric operator which mounts on the wall or ceiling and directly
drives torsion spring shaft.
Either of the two vertical pieces framing the doorway.
Jamb Angle (Jamb Bracket)
"L" shaped bracket used to fasten vertical tracks to doorjambs.
Weather-stripping attached to doorjambs to help seal door along the
Weather-stripping attached to door section meeting edges to seal
door between sections.
Condition where door sections lap the door opening one inch on
A force applied from or toward the side.
The distance above the top of the door opening to the centerline of
the horizontal track. This term is often confused with the term
Term for windows in sectional doors.
Hardware accessories to provide for door installation with minimum
headroom conditions. Usually less than 16" headroom.
A report of document that describes the composition of a material.
A report or document from the producing mill that provides all
pertinent data relative to the composition, structure, heat, etc. of a
Steel structures which attach to the guides. Engineered and
designed with deep embossing for strength, and are independently
tested to withstand more than 2,700 pounds per pair. Janus
installation-friendly mounting brackets feature safe rounded edges
and slots that allow for easy vertical adjustments as well as various
Used for steel mounting application.
A slender dividing bar fixed or removable between two doors.
Usually designed to carry wind load and not vertical load.
Hardware standard to provide for door installation with standard
headroom conditions. Usually 16" to 24" of headroom.
One Piece Door
Also known as Shin-busters. A door that operates as one-piece,
rather than a door made of mutliple sections.
Open Back Door
Hollow door with no insulation or back.
Area of the garage exterior where a garage door will hang for
Distance from garage floor to the top of an opening.
Distance between left and right jambs of an opening.
Opener / Operator
A device used to control the up and down motion of a door.
Bottom fixture with an arm that bends around vertical track to
receive lifting cables. Generally used with low headroom hardware.
The area between stiles in a door section. The "look" of a door is
considered the "panel style."
The small “latch” on the ratchet tensioner that lifts in order to
change door tension; when closed it locks the selected tension in
Entry person door which is built-in to a sectional door.
Complete weatherstripping package for sectional doors consisting of
astragal, jamb seal and header seal.
Leveling of vertical guides/jambs.
A wheel or drum machined in a way to receive the individual links of
a chain. Used to transmit direct power.
Push Down Spring Bumper
Spring-activated push rods mounted on horizontal tracks to force
door down during closing portion of door cycle. Generally used with
jackshaft type operator or manual chain hoist with standard lift.
Push Up Operation
Manual opening/closing of door.
A force generated from the center of an object toward the outside.
Ratchet Tensioning Device
Simpler mechanism to adjust tension while more accurately fine
tuning all the springs on the door at the same time.
Reduced Drive Chain Hoist (RDCH)
Modifies door operation from manual to reduced drive chain hoist
operation-- requires 3-3/4" of additional side room in the header.
When door is mounted on the outside of the building and color of
the curtain needs to be on the inside of the coil to be seen in the
Steel and nylon, usually with ball-bearing wheels that allow sections
to roll freely along door tracks.
R-value is a measurement of thermal efficiency of a garage door, or
how well the garage door insulates. The higher the R-value, the
increased thermal efficiency of a garage door. Be aware that
manufacturer’s R-value calculations may vary. To compare R-value,
make sure manufacturers follow the DASMA (Door and Access
Systems Manufacturers Association) guidelines by stating
Calculated door section R-value is in accordance with DASMA TDS-
Triple-Layer: Steel + Insulation + Steel Interior. Classica 3000 and
Stratford 3000 (residential) and Models 2700, 1380, 1350, & 1000
Individual components of a garage door. Garage doors are made
up of multiple sections to fill the appropriate height of a garage
opening. 7' tall doors are typically comprised of 4 sections spanning
the width of an opening. 7' tall doors in the Amarr Classica
Collection are made with 3 sections to provide a more vertical,
authentic carriage house door look.
A free rolling, cylindrical, ball bearing that is used to guide the
torsion shaft, maintain alignment, and reduce friction.
A pulley with a ball bearing built into it that is designed to handle a
cable and used to control the movement of the cables employed in
door counter balance system.
Side Bearing Plate (End Bearing Plate)
A bracket that attaches to the horizontal supports and possibly the
wall to provide a bearing surface for the torsion shaft near the ends.
Side Draft Stop
2-1/4" black neoprene stripping with a return for affixing directly to
the guides, this seal provides a barrier against the elements. Select
a length greater than or equal to your door height. The price covers
two strips for your door height, one per side.
Distance from each doorjamb to the nearest obstruction.
Single Car (SC)
Door section width < 10'
Hardware used to make up door counter-balance assembly.
Small spring-cushioned bumper attached to horizontal track to stop
door at full open position.
Spring Pad (Center Bearing Plate)
Plate or bracket which is located on the wall above door opening to
receive torsion spring assembly support brackets.
The sleeves or cones that are used to adapt the torsion springs to
the torsion shaft. Torsion springs usually have two fittings or cones.
One is a stationary sleeve or spring retainer, while the second piece
is an adjusting cone or winding sleeve.
Adjusting the tension to make sure the door opens easily; not too
loosely or with too much force.
Stationary Sleeves (Spring Retainers)
Part that fits into the end of a torsion spring permitting the spring to
be anchored to the spring anchor plate.
Steel gauge is the thickness of the steel material used in garage
doors. The lower the steel gauge number the thicker the steel.
Real steel gauge is the true thickness of the steel material. Nominal
steel gauge is the average thickness of the steel material used in
production due to a plus/minus tolerance level. Real steel gauge is
the minimum gauge of steel material used in production.
Vertical members of a door section which provide structural rigidity
and a location for hinge attachment. Generic term.
Support stiffener used to increase wind load capacities of a door, as
well as reduce deflection of a door section in the horizontal position.
Super Durable Polyester Paint
Long lasting paint system used only by Janus International which
has greater strength and durability. Backed by a 40 year film
integrity and 25 year no-fade limited paint warranty.
An extruded aluminum post which substitutes for doorjambs in
multiple door installations where a clear span is required. Operated
by a hand winch or electric operator, it swings up parallel to header.
Tapered Vertical Track
Refers to the graduated spacing of the vertical track away from the
jamb permitting weather-tight closing of door against jamb.
Tensioner – see Ratchet Tensioning Device
Top Draft Stop
2-1/4" black neoprene stripping with a return for affixing directly to
the door curtain where it meets the top of the opening, this seal
provides a barrier against the elements. Select a length greater
than or equal to your door width.
Adjustable brackets, which usually carry track rollers, mounted on
the top corners of the top section of the sectional door.
The shaft of a torsion spring assembly, which transmits lifting power
of the torsion springs to cable drums and lifting cables.
Counterbalance springs which provide balancing power by winding
and unwinding through door cycle.
Channel shaped metal bars that guide rollers on sectional garage
The arc of travel or sweep of the top section as the door is raised
from closed to open position.
Electric operator, which mounts above the door in the horizontal
position and lifts door by pulling, and pushing the top section.
Specifically designed for normal headroom and low headroom doors.
Support stiffener used to increase wind load capacities of a door as
well as reduce deflection of the door sections in the horizontal
Upper Vertical Track
Horizontal track assembly on a vertical lift door.
Refers to a hardware design that causes doors to open vertically, no
horizontal tracks required. This hardware is normally operated with
spring counterbalance, but also possible with weight
Track assembly mounted to door opening jambs to guide and
support a sectional door in the "closed" or "vertical" position.
A small 5”x17” window which provide outside visibility and allows
light entry into a roll up door. Constructed of a translucent
polycarbonate panel inside a glossy white 20 gauge frame, the
panels create no interference with the operation of the door. The
location and number of vision panels are limited by door size.
The amount of force (in PSF) exerted by the wind along the face of
the door as it stands in the opening.
Winding Sleeve (Adjusting Cone)
Part that fits into torsion spring permitting winding and tension