Originally Posted by Vonsgardens

Dow and Crew,
I built our poly houses using a hydraulic jack based tube bender, it put's an 18 degree bend at each point tou set so 10 bends get you the 180 degrees of bend you need for the structure.

We use chain-link fence toprail (it comes in 10'6" precut lengths with fitted/swiaiged? ends). Attaching the hoops to the purlins can be done either by drilling the tubing (not recommended as it weakens the tubing in the structure for wind or snow load (I know Southern Texas doesn't get much snow)) or you can use two piece purlin clamps ( I got mine from a company called growers supplies.).

We built our houses with 3 piece hoops (requires 30' plastic from side rail to side rail), so they are approximately 20' wide and 11-12 feet at the peak. We have also built them on 4' (48' long) or 8' (64' long) spacing between hoops. Nice thing is that they hold up the shade cloth well in the summer and then convert to poly tunnels in the winter.

John