Quote:
Originally Posted by Cole_Robbie
Neat. That's exciting.
For what it's worth, you really only need concrete on the corner posts, unless your soil is very sandy with no clay. 2x4s should be fine for the hip boards, instead of 2x6s. And for the plastic below the hip board, you want a single layer, because you can't inflate the part that rolls up, at least as far as I know. I doubled the plastic in that section and mine turned cloudy from rubbing together. A single layer would have been better.
Your two end purlins take the brunt of the wind. When a greenhouse collapses from wind, the end purlins twist, and then it all falls in. If you want to strengthen your structure, extra bracing for the each end rafter is the first place to start.
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my soil is 100% gumbo heavy clay. I think I'll take your advice and only concrete the corner posts. Still 8" of snow on the ground, so I have some time to think...like I need to do more of that!