Jin-pole
Get Jin-pole essential facts below. View Videos or join the Jin-pole discussion. Add Jin-pole to your PopFlock.com topic list for future reference or share this resource on social media.
Jin-pole
Diagram of gin pole

A gin pole is a supported pole that uses a pulley or block and tackle on its upper end to lift loads. The lower end is braced or set in a shallow hole and positioned so the upper end lies above the object to be lifted. The pole (also known as a mast, boom, or spar) is secured with three or more guy-wires. These are manipulated to move the load laterally,[1] with up and down controlled by the pulley or block. A gin pole can also be "jumped" to build a tower.

A gin pole being used to install a weather vane atop the 200 foot steeple of a church
Roof trusses being erected with gin poles

The gin pole is derived from a gyn, and considered a form of derrick, called a standing derrick or pole derrick,[2] distinguished from sheers (or shear legs) by having a single boom rather than a two-legged one.

Gin poles are also used to raise loads above structures too tall to reach with a crane, such as placing an antenna on top of a tower/steeple, and to lift segments of a tower on top of one-another during erection. When used to create a segmented tower, the gin pole can be detached, raised, and re-attached to the just-completed segment in order to lift the next. This process of jumping is repeated until the topmost portion of the tower is completed. They can also hold a person if strong enough. Thus opening stage uses, such as in magic shows

Gin poles are mounted on trucks as a primitive form of mobile crane, used for lifting and relocating loads, and salvage operations in lieu of a more sophisticated wrecker.

References

  1. ^ Patton, William Macfarland. A treatise on civil engineering. New York: J. Wiley & sons, 1895. 1214.
  2. ^ Australia, Emergency Management (2006). General and disaster rescue skills for emergency services personnel (PDF) (5th ed.). Dickson, A.C.T.: Emergency Management Australia. pp. 131-132. ISBN 1921152028. Archived from the original (PDF) on 21 March 2014. Retrieved 2014.

External links



  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

Jin-pole
 



 



 
Music Scenes