Re: Actually .......


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Posted by derek [68.122.13.144] on Wednesday, October 02, 2013 at 23:35:06 :

In Reply to: Actually ....... posted by Todd Somers [67.213.44.122] on Wednesday, October 02, 2013 at 21:17:41 :

As described by the army.
Chapter 5-1 page 131.

A gin pole consists of an upright spar that is
guyed at the top to maintain it in a vertical
or nearly vertical position and is equipped
with suitable hoisting tackle. The vertical
spar may be of timber, a wide-flange steel-
beam section, a railroad rail, or similar
members of sufficient strength to support
the load being lifted. The load may be
hoisted by hand tackle or by hand- or
engine-driven hoists. The gin pole is used
widely in erection work because of the ease
with which it can be rigged, moved, and
operated. It is suitable for raising loads of
medium weight to heights of 10 to 50 feet
where only a vertical lift is required. The
gin pole may also be used to drag loads hori-
zontally toward the base of the pole when
preparing for a vertical lift. It cannot be
drifted (inclined) more than 45 degrees from
the vertical or seven-tenths the height of
the pole, nor is it suitable for swinging the
load horizontally. The length and thickness
of the gin pole depends on the purpose for
which it is installed. It should be no longer
than 60 times its minimum thickness
because of its tendency to buckle under com-
pression. A usable rule is to allow 5 feet of
pole for each inch of minimum thickness.



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