Hi. I want to make a row cover for my raised bed using 1/4 or 1/2 inch pvc pipe. My beds are only 36" wide and I'm wondering if PVC pipe will bend that much without heating it. Anyone with experience using PVC pipe out there who can tell me what sort of curve I can get over a 3 foot width. I'm hoping to have enough height so that the curve doesn't compromise the growing space at the edges of the bed. I'm going to buy a length on the weekend to experiment, but wondered if there are any known formulas out there. Any suggestions for other cheap and easy materials that might work better? Thanks!