Removing sag in asym tarp

[Dylan D]

So I set up my 8x10 tarp over my hammock asym and noticed a big sag along the ridge line. It was on a CRL with Prussiks. Any idea on how to get rid of this?

[ksbcrocks]

You'll get some sag regardless because of the stretch of the material (assuming this isn't a poly tarp or Cuben fibre).

Having the CRL under the tarp might help, and making sure you're stakes are going out at the right angle should help too I would think.

[Dylan D]

Ok thanks for your help (in this thread and my other) I've found using the plastic tarp grip clips to clip the tarp to the CRL has helped but I will try setting up the ridge line under the tarp.

[zukiguy]

If it's a flat tarp (not cat cut) then you're kind of stuck with a bit of sag. If you have a pretty substantial CRL and you put the tarp over it, that will help. Just cinching everything down a bit tighter will help too but may not remove all the sag. I had a similar tarp years ago before hammocking and tried to recycle it. Luckily it was a good quality item so I was able to resell it to another hiker and get a more purpose-built hammock tarp.

[Boston]

Basically the tarp stretch more along the bias of the material, than along the edge where the hem is, so it sags. There are two ways to offset this: 1) create catenary cuts that will help put tension in the "excess" material. 2) cut and sew a reinforce ridge line (flat felled or bound).