It split at the female part of the ferrel and split the entire length.
It was my own stupidity that caused it with a way too short suspension triangle. I think it would have lasted otherwise.
I believe a good way of estimating the center width is to (((header - footer)/2) + footer). Then you have to subtract the depth for the cat curve cuts.
42" - 30" = 36" minus cat curve depth
39" - 30" = 34.5" minus cat curve depth
36" - 36" = 36" minus cat curve depth
I have a narrow tarp so I was trying to keep the spreader bar width down, but I may think about doing a 42".
I wonder what happens if you make one without a cat curve cut on the sides? If you notice the entire length of the hammock (whoopie, triangles and hammock) form a cat curve when you are in it. I think the sides exagerate the cat curve when you in the hammock, so if you didn't cut a cat curve on the sides wouldn't you still get a cat curve due to your weight pulling in the edges. Hmmm something to think about a bit more.