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  2. Barn door tracker - Wikipedia

    en.wikipedia.org/wiki/Barn_door_tracker

    A barn door tracker, also known as a Haig or Scotch mount, is a device used to cancel out the diurnal motion of the Earth for the observation or photography of astronomical objects. It is a simple alternative to attaching a camera to a motorized equatorial mount .

  3. Pole building framing - Wikipedia

    en.wikipedia.org/wiki/Pole_building_framing

    Pole building design was pioneered in the 1930s in the United States originally using utility poles for horse barns and agricultural buildings. The depressed value of agricultural products in the 1920s, and 1930s and the emergence of large, corporate farming in the 1930s, created a demand for larger, cheaper agricultural buildings. [2]

  4. Sliding door - Wikipedia

    en.wikipedia.org/wiki/Sliding_door

    Some sliding doors run on a wall-mounted rail, like this one Sliding doors in a modern wardrobe. The 'top-hung' system is most often used. The door is hung by two trolley hangers at the top of the door running in a concealed track; all the weight is taken by the hangers, making the door easier to move.

  5. Sliding glass door - Wikipedia

    en.wikipedia.org/wiki/Sliding_glass_door

    Sliding glass door frames are often made from wood, aluminum, stainless steel, or steel, which also have the most strength. The most common material is PVC plastic. Replacement parts are most commonly needed for the moving-sliding parts of the door, such as the steel rollers that glide within the track and the locking mechanisms.

  6. American historic carpentry - Wikipedia

    en.wikipedia.org/wiki/American_historic_carpentry

    A type of trussed plank frame barn in Sweden is representative of some types in America, the lack of heavy timbers in the framing give it the name plank frame barn. Plank-framed barns [22] are different than a plank-framed house. Plank framed barns developed in the American Mid-West, such as the patente in 1876 (#185,690) by William Morris and ...

  7. Pole vault at the NCAA Division I Indoor Track and Field ...

    en.wikipedia.org/wiki/Pole_vault_at_the_NCAA...

    Women's pole vault winners [2] [3] Year Athlete Team Mark 1998: Melissa Price: Fresno State Bulldogs: 4.22m 13–10 1999: Melissa Price: Fresno State Bulldogs: 4.25m 13-11¼ 2000: Tracy O'Hara: UCLA Bruins: 4.42m 14–6 2001: Thorey Elisdottir: Georgia Bulldogs: 4.51m 14-9½ 2002: Amy Linnen: Arizona Wildcats: 4.53m 14-10¼ 2003: Lacy Janson ...

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