Pat, of course each boat is different, but what I did was to go buy PVC 1" piping in 12 foot sections with the appropriate elbows (mostly 45 degree). then you can build a centerline arch and "T" ribs down to the toerail if needed. Then I drape a tarp over this and weigh it down with 1/2 filled empty antifreeze bottles that I used for winterizing. Here are a few shots. Good luck, Steph