One of my builders dropped the drawings off for two 8' solid mahogany gates. 90% of the gates are 4''x4'' frame, 3 1/2'' diagonal brace, arched tops, 6' tall. Looks like a fun job. My main concern is the weight and ability to find a really heavy duty hinge.
(Architectural Woodworking Forum)
From contributor J:
I'll be the first to admit that I don't know a darn thing about gates or doors, but my initial reaction would be to have at it. I'm sure you'll end up using multiple (4 + ?) hinges. I couldn't tell you where to find such HD hinges, but hell we've been making heavy doors for thousands of years across the world. Somebody has to have one. Just don't forget to have something beefy to hang the gates and hinges on!