The eave height on my building is 14ft, and the peak is 18ft, so the mezzanine will have a sloped ceiling peak, but for what I'm doing with it as far as storage, it'll work out fine. Paint booth won't be more than 9ft high, so a car on a twirler can rotate a good distance to get on the underside of the body. Worked in my last shop and I was pretty pleased with the 2,500,000 Lumens of LED lighting I had in there. Turn those on and it was like an X-Ray machine went off! I looked like a walking skeleton!
Cheers
Dave