FAQ >> Gallows Frame

Gallows Frame

When two gin poles are assembled with a horizontal beam across the pole heads, the device is called a gallows frame and resembles the apparatus that the hangman derrick used for his macabre work. The upper load blocks are fitted to the beam, which is arranged so that the poles are loaded concentrically. This gives the gallows frame a greater capacity than is available with a similar double gin pole, the increase can be in the order of 50%. As with gin poles, the height of a gallows frame is limited by the equipment needed to erect it, but units with hook lifts of 200 ft (61 m) are available with capacities of 600 tons (545 t). Shorter configurations achieve ratings as high as 1200 tons (1090 t). A double gin pole can be used to erect a vessel taller than the poles, but because of the gallows beam, a gallows frame is limited to shorter vessels.

Relative FAQ