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stationary cone is attached to the center bearing plate. The winding cone consists of holes every 90 degrees for winding the springs and two set screws to secure the springs to the shaft. Steel counterbalance cables run from the roller brackets at the bottom corners of the door to a notch in the cable drums. When the door is raised, the springs unwind, and the stored tension lifts the door by turning the shaft, thus turning the cable drums and wrapping the cables around the grooves on the cable drums. When the door is lowered, the cables unwrap from the drums, and the springs are rewound to full tension.
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against impacts. A typical single-car garage roller door has a preloaded spring inside the rolling mechanism. The spring reduces the effort required to open the door. Oversized roller doors in commercial premises are not sprung (except in the US), and a manual pulley and chain system or a geared motor is used to raise and lower (roll up and roll down) the door. Roller doors cannot be effectively insulated.
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springs contract, thus lifting the door as the tension is released. Typically, these springs are made of 11 gauge (3 mm) galvanized steel, and the lengths of these springs are based on the height of the garage door in question. Their lifting weight capacity can best be identified by the color that is painted on the ends of the springs.
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remember that if the garage door's weight is increased by adding glass, additional insulation, or even several coats of paint, the torsion spring's life may be significantly reduced. Additionally, springs in highly humid environments, such as coastal regions tend to have a significantly shorter cycle life, due to the corrosive cracking.
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A garage door with a broken spring or the wrong strength can fall. Because the effective mass of the door increases as the garage door sections transfer from the horizontal to vertical door tracks, a falling garage door accelerates rapidly. A free-falling garage door can cause severe injury or death.
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A typical version of an overhead garage door used in the past would have been built as a one-piece panel. The panel was mounted on each side with an unequal parallelogram-style hinge lifting mechanism. Newer versions of overhead garage doors are now generally built from several panels hinged together
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and other vehicles. The operating mechanism is usually spring-loaded or counterbalanced to offset the door's weight and reduce the human or motor effort required to operate the door. Less commonly, some garage doors slide or swing horizontally. Doors are made of wood, metal, or fiberglass, and may be
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Garage door manufacturers typically produce doors fitted with torsion springs that provide a minimum of 10,000 to 15,000 cycles and are guaranteed for three to seven years. One cycle is a single opening and closing sequence. Most manufacturers offer a 30,000-cycle spring. However, it is essential to
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at both ends. The apparatus mounts on the header wall above the garage door and has three supports: a center bearing plate with a steel or nylon bearing and two end bearing plates at both ends. The springs consist of a steel wire with a stationary cone at one end and a winding cone at the other. The
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Single panel doors can also be installed with (one piece track type hardware) that folds the door back with a single horizontal track on each side (mounted at the top of the wood frame) and a roller mounted to the top of the door on each side. A hinge on each side that attaches to the bottom of each
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Torsion spring systems can be hazardous as they are always under tension and release energy when the spring fails. Severe injury or death can be caused by the projectile pieces of a failed torsion spring. Many people have been injured or killed trying to adjust torsion springs, and special training
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Other factors like poor garage door maintenance, loose tracks, or components shorten torsion spring life. Owners are advised to avoid applying grease to garage door tracks because that makes the wheels "skate" in the track instead of turning on their bearings. Only bearings, hinges, and spring wire
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Single-panel doors are constructed from one monolithic panel. A single panel door swings up and overhead with a hinge on each side (jamb-type hardware) to a fully open position from the closed position. A disadvantage of monolithic panel doors is that the swing-up arc of the door occurs partially
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insulated base sections or other types of foam insulation. These premium doors can match steel garage doors and be a realistic imitation of wood (namely fiberglass units), but they may be more expensive than steel units. Fiberglass doors are commonly used near an ocean, where salt water can ruin
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Roller doors (sometimes called "sheet doors") are usually constructed of corrugated steel. They evolved from cover window and door coverings. Other materials can be used (e.g., transparent corrugated fiberglass) where strong impact resistance is not required. Corrugations give the door strength
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An extension spring counterbalance system consists of a pair of stretched springs running parallel to the horizontal tracks. The springs lift the door through a system of pulleys and counterbalance cables running from the bottom corner brackets through the pulleys. When the door is raised, the
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can pull or push a garage door with enough force to injure or kill people and pets if they become trapped. Modern openers have “force settings” that make the door reverse if it encounters too much resistance while closing or opening. Any garage door opener sold in the United States after 1992
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side of the garage door. Using track hardware, a car can be parked much closer to the door, as the door is positioned entirely inside the garage door header when in the open position. Track-type hardware has less arc when raising and lowering the garage door than jamb-type hardware.
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Garage doors can cause injury and property damage (including expensive damage to the door itself) in several ways. The most common causes of injury from garage door systems include falling doors, pinch points, improperly adjusted opener force settings, and safety eyes, attempts at
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The sections and rollers on garage doors represent a significant pinch hazard. Children should never be allowed near a moving garage door for this reason. On manually operated garage doors, handles should be installed vertically to promote "vertical orientation of the hand".
339:, but in the United States, they arose around the start of the 20th century. As early as 1902, American manufacturers—including Cornell Iron Works—published catalogs featuring a "float over door." Evidence of an upward-lifting garage door can be found in a catalog in 1906.
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Aluminum garage doors are usually found in commercial settings and are uncommon for residential ones. Aluminum is typically only used for full-view garage doors (doors that are made up of glass sections divided by aluminum stiles). Aluminum doors are rust-proof and low
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that runs through the middle of the spring, tying off to a solid point at the rear and front of the horizontal door track. The safety cable prevents hazards to bystanders when a spring, pulley, or cable breaks under tension and makes the system relatively safe.
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Sectional doors usually have three to eight panels and slide up and overhead. Sectional doors occupy the same internal garage space as a monolithic door. Sectional doors have two advantages over single-panel monolithic doors:
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that roll along a system of tracks guided by rollers. The weight of the door may be 400 lb (180 kg) or more but is balanced by either a torsion spring system or a pair of extension springs. A
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Each panel of a sectional door has its connection to the door track. This increases reliability and robustness compared to monolithic doors, which have only a few track connections for the whole panel.
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doors has become popular since the early 2000s, and many manufacturers clad the exterior of a steel door with composite, vinyl boards, or other trim to give it the appearance of wood.
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Maintenance of garage doors is described in the manufacturer's instructions and consists of periodic checks for correct operation, visual inspection of parts, and lubrication.
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Concerning thermal insulation, the roller door has a typical insulation R-value of 4.9 to 5.2. A sheet steel garage door has a typical insulation R-value of 0.5 to 2.7.
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Certain parts, especially springs, cables, bottom brackets, and spring anchor plates, are under extreme tension. Injuries can occur if parts under tension are removed.
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a raised panel wooden door. Steel doors are available in uninsulated, insulated, and a three-layer door, also known as a sandwich-style door. A design mimicking
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An application that needs more thermal insulation typically uses a foam-filled sectional garage door, which provides typical insulation R-values of 6.1 to 6.4.
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outside the garage. This means a vehicle must stop and park several feet in front of the door to avoid being hit by the garage door when it is opened.
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Wood garage doors offer aesthetic appeal, but they are high maintenance and may be expensive. Low-priced wood garage doors may warp and break easily.
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and the energy efficiency of a garage door are essential to avoid overheating and freezing problems, as well as for comfort and energy savings.
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is controlled motorized mechanism for opening garage doors adds convenience, safety, and security often used with a remote or a button on wall.
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Sectional doors do not require any space outside the garage to open. A vehicle may park very close to the garage before opening the door.
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Fiberglass and vinyl garage doors are composite units, combining a steel core behind a fiberglass or vinyl skin. They also have
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garage door can weigh 400 pounds or more; they only seem light because the springs balance the weight as you lift the door.
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Steel doors have a variety of sizes and styles, provide strength and security, are cost-competitive, and may have optional
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In the UK (and other parts of the EU), 'insulated' roller garage doors are available, using an aluminum lathe filled with
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and procedures are required to modify a torsion spring safely; it is a job for a professional, not a homeowner or DIYer.
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repair without the proper knowledge or tools, and uncontrolled release of spring tension (on torsion spring systems).
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Sectional-type steel with exterior cladding overhead garage doors in the style of old carriage house doors
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counterbalance system consists of one or two tightly wound-up springs on a steel shaft with
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Do it right the first time: what every homeowner needs to know before the work begins
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Extra strength is available with two or three layers of galvanized steel with a low
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A common material for a new garage door is a steel sheet formed or stamped
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Large door on a garage that accommodates vehicles entering and exiting
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The history of the garage door could date back to 450 BC when
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Extension spring systems should always be restrained by a
932:"DASMA Door and Access Systems Manufacturers Association"
903:"DASMA Door and Access Systems Manufacturers Association"
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793:"Tips from a pro: how to install a garage-door opener"
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that opens either manually or by an electric motor (a
872:"DASMA Metal Gauge Chart Technical Data Sheet #154"
847:"Are Sliding Garage Doors the Best Option for You?"
163:. Unsourced material may be challenged and removed.
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461:Garage doors can be made of many materials, but
961:"How Important Are Garage Door Safety Sensors"
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799:. Vol. 221, no. 1. pp. 91–93
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511:Industrial tents with rollup overhead doors
402:. Unsourced material may be challenged and
64:Learn how and when to remove these messages
523:foam for thermal and acoustic insulation.
487:Can use the entire ceiling of the garage.
422:Learn how and when to remove this message
241:Learn how and when to remove this message
223:Learn how and when to remove this message
121:Learn how and when to remove this message
717:Hamilton, Gene; Hamilton, Katie (2004).
558:number (0.6 - 0.7 mm steel panels).
484:A lot of space under the garage ceiling.
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400:adding citations to reliable sources
161:adding citations to reliable sources
723:. Innova Publishers. p. 154.
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845:Deziel, Chris (10 October 2023).
757:. Reader's Digest. 1999. p.
45:This article has multiple issues.
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820:Winterton, Deanne (2012-02-21).
480:The side sliding sectional door
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298:insulated to prevent heat loss.
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636:Extension spring lift mechanism
503:Detail of roller door mechanism
148:needs additional citations for
53:or discuss these issues on the
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606:Torsion spring lift mechanism
364:one piece track type hardware
909:. 1993-01-01. Archived from
822:"History of the Garage Door"
596:residential attached garages
314:operates on the center track
101:the claims made and adding
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791:Day, Richard (July 1982).
566:Steel stamped construction
490:Fast access to the garage
348:Single panel garage doors
753:Ask the Family handy-man
594:In situations involving
877:. DASMA. Archived from
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18:Roll up door
680:safety eyes
673:Mechanical
645:Maintenance
616:cable drums
302:Description
295:automobiles
281:is a large
279:garage door
1002:Categories
970:2023-04-06
946:2012-11-04
917:2012-11-04
888:2015-07-19
856:3 February
831:2015-07-19
803:2015-07-19
774:2015-07-19
736:2015-07-19
701:References
590:Insulation
412:April 2023
337:gatehouses
183:newspapers
95:improve it
50:improve it
936:Dasma.com
907:Dasma.com
678:requires
383:does not
99:verifying
56:talk page
333:chariots
404:removed
389:sources
327:History
197:scholar
93:Please
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653:Safety
598:, the
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1013:Doors
882:(PDF)
875:(PDF)
556:gauge
471:vinyl
463:steel
343:Types
204:JSTOR
190:books
858:2024
763:ISBN
725:ISBN
467:wood
387:any
385:cite
283:door
176:news
759:138
398:by
159:by
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