>>>Well after getting squeezed out of my greenhouse last year for not having enough room, I'm going BIG! I have these 1 3/8 iron joints for a old tent and using fence tubing that's 1 3/8 iron. I already know. 1 3/8 and 1 3/8 don't match up, but that's what I have to work with. So, I'm taking Port Orford White Cedar and making dowling to fuse the joints together. Then I'll steam the POWC roof joints and bend the to the desired curve. POWC is so neet to work with. This green house is going to be 40ft X 30ft X and the top will start about 10ft, but I'm gonna make it so that I can rise the GH up to 14 ft +. Then I take old bailing twine and make a net (so to speak) and put this over the whole GH to hold it down in strong winds. This is a must where I live,we have 50 to 75mph winds here on the Oregon coast. I'm growing for 3 other patients this year. Gotta take care of my peeps. Growing MJ is just to cool. I love it!!! Peace out