most old construction gin poles are concentric ply

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Posted by mike stone on Saturday, April 26, 2003 at 1:52PM :

In Reply to: Re: thats really an A-Frame not a Gin Pole posted by MoparNorm on Saturday, April 26, 2003 at 1:25PM :

as they were originally a tree
and if it splits you have a real problem
if i remember the safe working range is about 10 degrees from vertical


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