Is it safe to sew widths of 1.9 ounce ripstop together lengthwise to make a hammock wider? The widest material at JoAnn's is 59" wide. I would like to join three pieces using a full flat felled seam. I would be adding about ten inches to either side of a normal 59" wide piece, which would place the seam away from the bottom of the load bearing area. Do you folks think that to be safe? Thanks in advance

Daryl