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2. 19-inch rack - Wikipedia

   en.wikipedia.org/wiki/19-inch_rack

   The 19-inch (482.6 mm) standard rack arrangement is widely used throughout the telecommunication, computing, audio, video, entertainment and other industries, though the Western Electric 23-inch standard, with holes on 1-inch (25.4 mm) centers, is still used in legacy ILEC / CLEC facilities. A 19-inch rack used for switches at the DE-CIX in ...

3. Pole building framing - Wikipedia

   en.wikipedia.org/wiki/Pole_building_framing

   Pole framing or post-frame construction[ 1] ( pole building framing, pole building, pole barn) is a simplified building technique that is an alternative to the labor-intensive traditional timber framing technique. It uses large poles or posts buried in the ground or on a foundation to provide the vertical structural support, along with girts to ...

4. Utility pole - Wikipedia

   en.wikipedia.org/wiki/Utility_pole

   Other common utility pole materials are aluminum, steel and concrete, with composites (such as fiberglass [citation needed]) also becoming more prevalent. [11] One particular patented utility pole variant used in Australia is the Stobie pole, made up of two vertical steel posts with a slab of concrete between them.

5. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   In 1913, Woolley and Meredith defined them like Anthony, but gave the following dimensions: hex head cap screws up to and including 7 ⁄ 16 inch (11.1125 mm) have a head that is 3 ⁄ 16 inch (4.7625 mm) larger than the shank diameter; screws greater than 1 ⁄ 2 inch (12.7 mm) in diameter have a head that is 1 ⁄ 4 inch (6.35 mm) larger than ...

6. Post (structural) - Wikipedia

   en.wikipedia.org/wiki/Post_(structural)

   Rarely a post may have an "integral bracket" [14] which is a mid-post flair to carry a lower timber. The portion of a flared post extending upward at the top is called the upstand [15] and one of the top tenons is called a teazle (teasel) tenon. Jetty – A post supporting a jetty; Door –: A post framing a doorway.

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