Does anyone know how to determine what size/type of pipe/tubing would be necessary to withstand given wind speeds? Specifically, I'm wanting to build a "megatree", an outdoor Christmas tree made simply by stringing lights from the top to the bottom in a conical shape. I'd like a 20' + tree, but I don't know what size pipe/tube I'd need as the mast. My initial plan is to bury a 2'-3' pipe in reinforced concrete in the ground to serve as a sleeve for the main pipe (no more than about 1/8" inch play) which would be guy-wired. I want to be able to remove the main pipe after Christmas and cap off the sleeve at ground level. The lights (and star on top) will add about 200 pounds, spread evenly in all directions around the main pipe, if that makes a difference. I prefer to use galvanized steel (no PVC). I was considering 1.5", but didn't know if wall thickness would matter in my application. Does anybody have any suggestions on what to go with to ensure winds (short of a hurricane) won't bring it down? Winds in my area will gust from time to time in the 40 mph range. Rare to see 50+ mph sustained winds.