Before the wind storm, we had attached the cold frame with short pieces of pvc pipe placed over the ends of the hoops onto a grooved piece of wood attached to the bed frame, as shown at the right.
The plastic over the hoops is screwed on to the hoops with 1/4 round pieces of pvc piping (3/4" round).
In order to screw through the pvc and the plastic and the pipe hoops, Tim pre-drilled each hole, which helped a lot to keep the screws from slipping.
Tim nailed these pieces of plywood on the sides to hold the sides of the plastic down. I held and stretched the plastic while Tim screwed.
A shot of the whole deal, upside down. I think those are the highlights of the construction. While stretching and screwing on the plastic, we kept the frame flat and kept checking the ends to keep the whole thing square. Once we had the plastic screwed onto the ends, the whole thing stayed pretty square.
Tim has also made two more frames with hoops which we intend to cover with frost cloth to cover the most sensitive plants (peppers, tomatoes) just after planting in May. There are always a few freezing or almost freezing nights that time of year, and hail! We aren't sure yet if or how we will attach the frost cloth. We may attempt a way to roll it over the hoops, so we can remove it and put it back again at will. We're just not sure it will hold in the wind, unless we tack it down real good.