At about 2:25 they shoot some video from the top of the tower which is neat because you get a full 360° of the work site.
Showing posts with label Gin pole. Show all posts
Showing posts with label Gin pole. Show all posts
Thursday, November 29, 2012
1955 Radio Tower
This is a nice little video done on 8mm, probably Kodak film back in 1955. It's a edited silent documentary film of the construction of a radio tower for the Texas Gas Transmission Corp. What's interesting is that it's very similar to the way we do things now. Towers are still made of modular parts, and either carried up, hoisted up or pulled on a gin pole. There are clearly some hijinks going on OSHA would never allow today, but it's illustrative as to how tower technology hasn't changed much in half a century.
At about 2:25 they shoot some video from the top of the tower which is neat because you get a full 360° of the work site.
At about 2:25 they shoot some video from the top of the tower which is neat because you get a full 360° of the work site.
Friday, December 19, 2008
Gin Pole
Every profession includes it's jargon, and technical terms. Some of these are self-explanatory other are more arcane. A Gin pole has no resemblance to a swizzle stick. the meaning descends from the original meaning of "gin" which was a device or contrivance. Basically any gadget. "Pole" however is quite literal.
In radio these are used to erect towers. A layperson might guess, or intuitively know that a tower is constructed of very similar modular parts. That it is not a single piece to be erected. The problem is that as tall as they are, it's very difficult to raise, and lower into place the upper portions. In short it provides mechanical leverage.
It is very different from a crane boom for one key reason: It's mounted stationary, to the lower portion of the tower. The basic design is that a pulley is mounted on the top of gin pole, and this is used to pull up segments to a high point where a tower man can position the part. thsi top pulled is called a "rooster head." The hoisting work is done from below so that more precise positioning work can be done above. That being said, these parts are heavy, and if you don;t understand the mechanical principles here you are going to kill somebody. Follow the TIA 1019-Gin Poles Standards.
The lifted segments connected to the running line at multipel points by slings. It is connected at a midpoint called a "tag line sheave" and two or more connections at the top are connected to a "headache ball" to center the load. These points are connected to the load line which bears the weight, and the running line which guides the lift.
The term is nautical in it's origin. The gin pole used in a boats rigging is mounted on a pole perpendicular to the mast, and provides mechanical leverage to quickly raise and lower the mast. It's difficult to do this alone, without one. The terms primary usage is now in tower work, but it's also applied to certain rigs used by arborists and rock climbers.
In radio these are used to erect towers. A layperson might guess, or intuitively know that a tower is constructed of very similar modular parts. That it is not a single piece to be erected. The problem is that as tall as they are, it's very difficult to raise, and lower into place the upper portions. In short it provides mechanical leverage.
It is very different from a crane boom for one key reason: It's mounted stationary, to the lower portion of the tower. The basic design is that a pulley is mounted on the top of gin pole, and this is used to pull up segments to a high point where a tower man can position the part. thsi top pulled is called a "rooster head." The hoisting work is done from below so that more precise positioning work can be done above. That being said, these parts are heavy, and if you don;t understand the mechanical principles here you are going to kill somebody. Follow the TIA 1019-Gin Poles Standards.
The lifted segments connected to the running line at multipel points by slings. It is connected at a midpoint called a "tag line sheave" and two or more connections at the top are connected to a "headache ball" to center the load. These points are connected to the load line which bears the weight, and the running line which guides the lift.
The term is nautical in it's origin. The gin pole used in a boats rigging is mounted on a pole perpendicular to the mast, and provides mechanical leverage to quickly raise and lower the mast. It's difficult to do this alone, without one. The terms primary usage is now in tower work, but it's also applied to certain rigs used by arborists and rock climbers.
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