3 Car Garage
Looks good so far. :thumbup:
Maybe I missed it, but were you looking to get a 2 post, or a 4 post lift?
The 4 post will not need as much head room unless you're lifting vans or light trucks. I forget the exact height on my garage ceiling, but I know I have almost 12' to the bottom side of the steel I beams. The I beams are 12" high, so the floor joists on the second floor sit roughly 13' from the concrete floor of the garage.
Here is where I bought my lifts from.....
http://www.e-autolifts.com/index.html
There is a good chart with a break down of size options that cover height, width, length, etc.