Thanks for the comments. I'm concerned with other design factors.

Another question: how do you do the entrance in a 3V? Just take out a triangle? Do you something special with it? I've seen Disco Dave's modification to make a door, but I'm hoping for something simpler.

Not a noob, but still have some questions about dome-building. Here's the chase: I want to build a dome for my camp's communal shade structure, and I need to decide what EMT thickness to use: 3/4" or 1"? The plan is for a 3V, 22-24' foot diameter dome. I understand, having been closely involved in b...