Coy,

Can you measure the fabric length between the ends of the ridgeline?

The reason I mention that is because the sag angle is pretty much

determined by the ratio of the ridgeline length to the fabric

length. I was thinking that you would like to keep the same ratio:

100/120, if possible. So, if you measure a fabric length of 140",

you would like the ridgline to be 140*100/120 or 117", to get the

same sag angle for the hammocks.

For what it's worth, the approximation that I use for the sag angle

is the arc-cosine of the ridgeline length divided by the fabric

length, which for this case is the acos(100/120) or 33.5 degrees.

The tension on the integral ridgeline is a function of the occupants

weight, the sag angle and the angle of the hammock support ropes

(referenced to horizontal). For a sag angle of 33.5 degrees, the

tension on the ridgeline is equal to the tension on the hammock

support ropes when the hammock support ropes are at an angle of about

17.5 degrees, the tension on the ridgeline is about half the tension

of the tension on the hammock support ropes when the hammock support

ropes are at an angle of about 25.5 degrees and the tension on the

ridgeline is about 1.5 times the tension on the hammock support ropes

when the hammock support ropes are at an angle of about 9 degrees.

Be careful of the tension on the ridgeline because it can get real

high if you hang the hammock too taut.

Dave