Those pipes are seriously bent and under a lot of pressure. I think I would cut them in half right at the peak and glue some to fashion a little A frame, or more accurately That should relieve some of the pressure which may alleviate the bowing bottom. If not the clothes line isn't horrible but a couple Ts and another piece of PCV between hoops 2 and 3 attached across the bottom will do the trick. Of course, you'd have to plant around that piece.

SCgirl, I used untreated 2x12 lumber and heavy duty deck screws, and the bed dimensions are 4x8 feet. For each bed I took three eight foot pieces, and cut one in half to make the ends. Avoid the pressure treated lumber ( the CCA stands for copper, chromium, and arsenic). Cedar is best, just make sure you're sitting down when they tell you the price...you can still get a few seasons out of plain untreated lumber and save some money. The floor you see is landscape fabric, which will let moisture through but keep down the grass. I'll cover the pathways with cedar mulch. Inside the beds, I'll cut out the landscape fabric so I'll have a good soil interface for earthworms and beneficial microbes. Before the soil goes in I'll add a layer of cardboard just to make sure no grass/weeds have a chance to peek through. Here is a link that might be useful: Raised bed material analysis

I just did a green manure over winter and then double dug the mass of Austrian peas and crownvetch deep into the bed this spring right before planting. They told me to wait 2 weeks but I didn't because I was already late. I figured it would be two weeks before any roots got down there.. GOD, everything is loving it. It could be all the rain too. I have never seen green beans so happy or cucumbers so quick out of the gate and fruiting so quickly too.. I will be doing green manure to half my garden next year. I missed having my winter garden last year. About the draining water. My raised beds are big enough and high enough so I plant in ditches around tomatoes and build hollows around my cages of beans. Everything gets a bit of a ditch in the summertime. When I water the ditches and walls direct the water to the roots. It does not spread out. I learned that from someone who gardens in New Mexico. I have been thinking of using some ollahs too as an experiment. There are ways to make them with clay pots and a plastic gallon jug with holes in the bottom variation.

I have several raised veggie beds without weed barriers and they do get some weeds but its usually on the very top, not coming from the bottom. So I don't think weed cloth would really work. Its up to you but I don't think its worth the money or time. In the future if you want to turn those beds down deep it could be an issue. My beds are 8'x4'x2' Instead of weed barrier I would spend the money on some kind of watering system or you will be out there with the hose constantly and that gets old fast. Camp Verde AZ