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Old July 17, 2012   #8
Cole_Robbie
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Join Date: Jun 2012
Location: Illinois, zone 6
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Those hoops would be a lot more secure with a purlin.

In this diagram, item "B" is the uppermost purlin. It's normal with any quonset structure. It's just a pipe running long-ways. You can buy white duct tape to attach the purlin pipe. Put the purlin on the inside of the hoops.



Building it is the easy part, keeping it from cooking in the hot sun is the hard part. If you want to splurge, you could incorporate a solar-opener, but I think you'd have to use a rigid covering material like the clear polycarbonate sheeting. The openers are not that expensive, but those poly sheets are.
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