Here is my first hammock, a 4 spreader bar bridge hammock. The material is Sunbrella. The design philosophy is a elevated bed that cannot fail! I used materials that I am familiar with, Flat webbing re-inforces the fabric, top spreaders are supported by 5/32 SS wire. 1/2 inch CCF used for insulation.
I just got back from the local park where I slung this baby up between two friendly trees. It is comfortable, I can lie on my side or my stomach, but the hammock is best exited by grabbing the ridgeline and pulling oneself up. The 18 inch sides keep the sleeper safe from wind or even falling out.
The tree straps are doubled 1 inch nylon tubing with ladder bars sewn at 6 inch increments