I wanted a weather cover for my deck. My deck is 18 feet wide and 16 feet long, I shortened the sections to reduce the 20ft length to 16ft. I take the canvas to a local canvas shop to get it shortened.  I get 3 years out of a canvas, then it's replacement time. I'm in Indiana and have to knock the snow off, so the frame don't collapse. It'll handle about 2.5 inches of snow, remember it is shortened, so it is stronger than designed by Shelter Logic. I like the amount of light that comes thru the canvas.  I wish Shelter Logic would do custom work and shorten the canvases for me.