Originally Posted by
kitsapcowboy
FWIW, the reason I gave a factor of 2.86 time the tree diameter is that the length is three quarters of the circumference plus the radius (i.e., one half of a diameter), which is the minimum run of strap required for all contact points on the tree to be protected, wrapping 270 degrees around the tree and coming straight off on the front side to connect with a clip or carabiner...
(.75 * 3.14) + .5 = 2.36 + .5 = 2.86
The looped end of the strap (with the clip/carabiner) can connect to Amsteel cord suspension rather than strap, so for the shortest practical strap that still protects the tree, a factor 2.86 is sufficient, and a factor of 3.36 isn't strictly necessary, IMHO.
HYOH...
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