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Picture of make a tree surgeon harness out of tie down car straps
New tree surgeon harnesses can be very expensive typically £150~£200 and at least £50 for a used one. For small and occasional DIY jobs a cheaper alternative I use is to make a harness  out of car straps by copying the basic  design setting of the expensive ones. The straps can then be reused for their original purpose.
Keep in mind that what follows is not the best possible solution and you do this at your own risk. I decline any responsibility of any harm or injury or damaged caused by the use of such method.

Step 1:

Picture of
make loops on the straps (straps like http://www.s2as.com/p-Dakine_Tie_Down_Straps_12_2011-3973.aspx)  as indicated, (position depend on body and legs size)  the loops  are needed later to keep the lateral downward  ones (wihout loops) in position. one strap with 2 loops, 2 straps with one each , 2 strap with no loops, length at least 2 .5 metres 
 
espdp22 years ago
Man, the lawyers would have a fit, but who cares... :-)

This looks much more comfortable than the swiss seat made from rope that I was taught in the Army!
lafnbear2 years ago
"Pay attention to your testicles"... always good advice!
robz40 (author)  lafnbear2 years ago
:-)
wire-nut2 years ago
Also a little padding go long way too.
robz40 (author)  wire-nut2 years ago
yes if you want to, keep in mind that this harness is meant to prevent you from falling not so much to dangle down the tree.