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I am now playing around with the guy rigging. Too much tension, on the ropes that hold the bottom tier, is causing the top tier to bend a bit much, for my comfort level. Tomorrow, I'll buy more rope, and try guying from the top tier, below the roof run. The way it stands, now, I have enough tension in the system to keep the pipes from contacting my RV, but not enough to stress the top tier to the point of detaching (hopefully). Sway is inherent in any structure that gets any wind exposure (ask any structural engineer about highrise sway), but I'm not sure how much I want in my system, or how much it can stand. With an 8' wide RV and a 12' wide RV shelter, I should be fine except in very strong winds which Austin hasn't had in the forty years I've been here. Also, my site, by design, is in a corner of my yard that is sheltered by heavy understory trees and brush, with very little wind exposure.
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