I too would be interested in knowing how to achieve the proper tension on a tarp (I want to prevent damage to the tie-out point, and keep the tarp from flapping in a good strong blow especially silnylon). I was planning on using 1/8" zip chord attached in the way Headchange4You described in a thread earlier, and 2mm Dynaglide made into UCR for adjustability. Does anyone know if zip-chord (Bungee type stuff) loses any of it's stretchability in low temperatures?
Tee-Dee pointed out to me that zip-chords do not seem to effected by UV so much, since the polyester sheath is covering the inner rubber strands, and the fact that they have been used on tents for years now probably suggests that it would be a good way to go.
Does anyone think that the length of the tie-out in a variable situation would have any effect on the tension force applied to the tarp? I mean...does the tension force stay the same or is it variable.
What is everyone thinking on this subject? I hope this all made sense.