I got tired of rain saging and stretching my boat cover. Built this with 3/4 inch PVC, 1/2 inch will sag. It is in three parts, so 1 person can take it on and put it in. Any rub points were padded with hot water pipe insulation kept in place with cable ties. Has been through hurricane winds and rain, well, what you get 120 miles inland. I used PVC t's, 90's and 45's. Just use your imagination, can be applied to 12 jon boats up to pontoon boats.