Speaking of huge monkey huts... what's the longest rib section you've seen on a monkey hut, and what thickness is the PVC on that?
We do a 30' long hut with 30' long ribs (making the opening about 20' wide). The 30' long ribs are 1" Schedule 40 PVC electrical conduit with built-in bell connectors.

The 1" PVC holds up pretty well at that length, but does start to get a bit flexible. We guy down the peak of the front and back ribs, but the tension even with 30' ribs starts to pull the peak down towards the ground more than we'd like.
We're planning on experimenting this weekend with 40' rib sections of the same 1" PVC, but I have some doubts as to whether it will be stiff enough to keep a decent peak at the front and back when guyed down. I'm thinking we may bring some 1 & 1/4" or 1 & 1/2" PVC to sleeve over some of our 1" stuff on the end ribs to stiffen it up.
Has anyone built a hut that uses 40' long ribs, and, if so, did you have to go to the 1 & 1/4" or 1 & 1/2" PVC or use a vertical brace to keep the peak from drooping?
Our test build this weekend will be in a pretty serene location compared to the playa, so it won't be a full test, but it should tell us something. Luckily there's a Home Depot nearby so we can retool if needed. I'll follow up with pics to let you know how it goes.