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."