Originally Posted by WarmSoda
Wouldn't it be 59 x 2 = 118 - 2 for seams = 116? I guess Brandon is pretty good with seams and doesn't need a half inch on each end and a full inch on the ridgeline seam (half on each side)
If you're binding the tarp with gross grain like OES then you can get by with a single fold for the hemming, so more like 3/8" on the hem and 1" on ridgeline. (NOTE: I do not know what kind of folding, if any, OES does under the gg binding - I'm just mentioning that you could gain a fraction of an inch if you're going to bind it).
Honestly, I wouldn't sweat that 1" or 2". Two widths of 59", no matter your seam allowance, is a large tarp.