There should be no strength requirements for hammocks. Yes, stronger is better- but your hammock is not part of your safety system. I occasionally use the 11 ounce
http://www.byerofmaine.com/amazonas-traveller.htm. This thing is nowhere nearly as strong as the TB, but sometimes weight is the big concern. When I lay in that hammock, I prepare for it to just rip right open and let me fall- so my ropes better be ready!
Are your ropes ready?
love
nick