Door types There are many types of door hinges. The main types include: Spring hinge a spring-loaded hinge made to provide assistance in the closing or the opening of the hinge leaves. A spring is a component of a hinge, that applies force to secure a hinge closed or keep a hinge opened. Barrel...
History Of Door : The earliest in records are those represented in the paintings of some Egyptian tombs, in which they are shown as single or double doors, each in a single piece of wood. Doors were once believed to be the literal doorway to the afterlife, and some doors...
Suicide door : A suicide door is the slang term for an automobile door hinged at its rear rather than the front. Such doors were originally used on horse-drawn carriages, but are rarely found on modern vehicles, primarily because they are widely perceived as being unsafe. Popularized in the custom car trade,...
Glass Flooring A German manufacturer of squash court floors has diversified into making glass floors for other sports, such as basketball. Their glass floors usually are translucent rather than transparent, and the line markings are indicated by illumination with LEDs below the floor. On occasion, transparent display cases are built into...
The general types of telecommunications data centers include: structural platforms and, truss assemblies. Structural platforms — members constructed of steel angles or channels that are welded or bolted together to form an integrated platform for supporting equipment. Truss assemblies — utilizing attachment points to the subfloor to support a...
History Of Door : The earliest in records are those represented in the paintings of some Egyptian tombs, in which they are shown as single or double doors, each in a single piece of wood. Doors were once believed to be the literal doorway to the afterlife, and some doors...
Metal whiskers Raised floors and other metal structures such as cable trays and ventilation ducts have caused many problems with zinc whiskers in the past, and likely are still present in many data centers. This happens when microscopic metallic filaments form on metals such as zinc or tin that protect many...
Electric Fence A fence charger places an electrical pulse from ground to the wire about once per second. The pulse is narrow and usually around 5-20 kV. Animals receive an uncomfortable but harmless shock when contacting the wire, and learn to stay away from it. ...
Synthetic Fence Vinyl fence is installed in a manner similar to plain high-tensile fence and must be stretched tight. Strong bracing of posts at corners and in the middle of long fencelines is required. Like other wire fences, keeping vinyl fencing tightened on a regular basis is key to safety and...
Dutch door : A Dutch door (American English), stable door (British English), or half door (Hiberno English), is a door divided horizontally in such a fashion that the bottom half may remain shut while the top half opens. They were known in early New England as a double-hung door. The initial...
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