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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 ...
Garages: Garage doors are generally 84" (7 feet; 2134 mm) or 96" (8 feet; 2438 mm) wide for a single-car opening. Two car garage doors (sometimes called double car doors) are a single door 192" (16 feet; 4877 mm). Because of size and weight these doors are usually sectional.
A 2011 discovery in the Canadian province of New Brunswick yielded the earliest known plants to have grown wood, approximately 395 to 400 million years ago. [5] [6]Wood can be dated by carbon dating and in some species by dendrochronology to determine when a wooden object was created.
It is also known as the stiffness to weight ratio or specific stiffness. High specific modulus materials find wide application in aerospace applications where minimum structural weight is required. The dimensional analysis yields units of distance squared per time squared.
The most common doors on these garages were either two wooden barn style doors with a standard sized access door on the side of the garage or the B&D Rolla Door, which is described below. The most common garage door to date in Australia is the B&D Rolla Door, having been around since 1956 and still in heavy use today.
The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.
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