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  2. Tipi - Wikipedia

    en.wikipedia.org/wiki/Tipi

    A typical family tipi is a conical, portable structure with two adjustable smoke flaps, multiple poles (historically from 12 to 25 ft or 3.7 to 7.6 m long) called lodge poles. Lewis H. Morgan noted that tipi frames were 13 to 15 poles that were 4.6 to 5.5 metres (15–18 ft) tall. These poles, "after being tied together at the small ends, are ...

  3. Ceiling fan - Wikipedia

    en.wikipedia.org/wiki/Ceiling_fan

    Ceiling fan. A modern ceiling fan. A ceiling fan mid-spin. A ceiling fan is a fan mounted on the ceiling of a room or space, usually electrically powered, that uses hub-mounted rotating blades to circulate air. They cool people effectively by increasing air speed. Fans do not reduce air temperature or relative humidity, unlike air-conditioning ...

  4. Awning - Wikipedia

    en.wikipedia.org/wiki/Awning

    Awning. Art Nouveau awning in Nancy (France) City-house with an awning above the entrance, in Bucharest (Romania) Grand Hotel with numerous awnings in Toledo, Ohio. An awning or overhang is a secondary covering attached to the exterior wall of a building. It is typically composed of canvas woven of acrylic, cotton or polyester yarn, or vinyl ...

  5. Tree volume measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_volume_measurement

    Two poles, longer than the diameter of the fused section, are lifted in place and connected by a thin rope threaded through opposite ends so they are adjustable. The poles are temporarily tensioned and the distance between the ends measured. Adjustments are made until they are parallel and perpendicular to the axis of the trunk.

  6. Jack post - Wikipedia

    en.wikipedia.org/wiki/Jack_post

    Jack post. A jack post (telepost, adjustable steel column) is a steel post used in the construction trades for temporary support of ceilings, walls and trenches (shoring). They are designed to be able to mechanically telescope to about twice their shortest length in order to span a wide variety of spaces. Most examples use removable pins for ...

  7. Photovoltaic mounting system - Wikipedia

    en.wikipedia.org/wiki/Photovoltaic_mounting_system

    Pole mounts, which are driven directly into the ground or embedded in concrete. Foundation mounts , such as concrete slabs or poured footings Ballasted footing mounts , such as concrete or steel bases that use weight to secure the solar module system in position and do not require ground penetration.

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