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2. Door - Wikipedia

   en.wikipedia.org/wiki/Door

   Up-and-over or overhead doors are often used in ... door size is 36 in × 80 in (910 mm × 2,030 mm). ... and perhaps a threshold at the bottom. When a door has more ...

3. Roller shutter - Wikipedia

   en.wikipedia.org/wiki/Roller_shutter

   A roller shutter, security shutter, coiling door, roller door or sectional overhead door is a specialized type of door or window shutter consisting of multiple horizontal slats, bars, or web systems interconnected through hinges. The mechanism involves lifting the door to open it and lowering it to close.

4. Loading dock - Wikipedia

   en.wikipedia.org/wiki/Loading_dock

   Truck loading dock with overhead door, dock leveler, dock seals, canopy, indicator lights, and truck restraint system. In order to facilitate material handling, loading docks may be equipped with the following: [1] Bumpers – protect the dock from truck damage, may also be used as a guide by the truck driver when backing up.

5. Clearance (civil engineering) - Wikipedia

   en.wikipedia.org/wiki/Clearance_(civil_engineering)

   The clearance for overhead signs is 5.7 metres (18 ft 8 in) and the clearance for the soffit or underside of overpasses is 10 metres (32 ft 10 in). [ 6 ] In South Africa and the southern region of Africa, the minimum vertical clearance of modern bridges is 5 metres (16 ft 5 in), although the legal height limit of road vehicles is still at 4.3 ...

6. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   Sectional garage door Up-and-over garage door Garage Door Hardware. A garage door is a large door to allow egress for a garage that opens either manually or by an electric motor (a garage door opener). Garage doors are frequently large enough to accommodate automobiles and other vehicles. The operating mechanism is usually spring-loaded or ...

7. Gasket - Wikipedia

   en.wikipedia.org/wiki/Gasket

   A gasket is a mechanical seal which fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression. [1] It is a deformable material that is used to create a static seal and maintain that seal under various operating conditions in a mechanical assembly. [2]