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  2. 19-inch rack - Wikipedia

    en.wikipedia.org/wiki/19-inch_rack

    A key structural weakness of front-mounted support is the bending stress placed on the mounting brackets of the equipment, and the rack itself. As a result, 4-post racks have become common, featuring a mirrored pair of rear mounting posts.

  3. Rack unit - Wikipedia

    en.wikipedia.org/wiki/Rack_unit

    Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...

  4. Shelf (storage) - Wikipedia

    en.wikipedia.org/wiki/Shelf_(storage)

    When hanging shelves on a wall, home designers generally try to ensure that the shelf should be no wider than 1.4 x bracket's width and no wider than 1.2 x bracket's height. [citation needed] Spacing brackets for a long shelf should be no more than 4 x shelf-breadth between each bracket - this holds true for normal materials used at home. [8]

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  6. Stanchion - Wikipedia

    en.wikipedia.org/wiki/Stanchion

    In event management a stanchion is an upright bar or post that includes retractable belts, velvet ropes, or plastic chains, sometimes in conjunction with wall-mounted barrier devices, barricades, and printed signage [6] and often used for crowd control and engineering people flow and construction site safety.

  7. Photovoltaic mounting system - Wikipedia

    en.wikipedia.org/wiki/Photovoltaic_mounting_system

    The PV array consist of solar modules held in place by racks or frames that are attached to ground-based mounting supports. [11] [12] In general, ground mounted PV systems can be at the optimal tilt angle and orientation (as compared to roof mounted systems that can be non-optimal particularly for retrofits). Ground-based mounting supports include: