I am getting ready to pull the trigger on a 22x36 shop over a crawl space. I have not compromised on much of anything, I have go to 2 beams instead of 1, the beam are running the 36' span and are triple 2x12's or similar. I am going with 2x12 joists and rim boards. After I was reviewing the build list with Carter Lumber, I got to thinking, why am I using just 3/4" T&G OSB flooring? I have done some looking and now I am leaning towards 1" or more T&G plywood (plytanium) or 1 1/8" OSB. I have even considered the advantech flooring. My question is this, I already have a 20" planer, a 10" cabinet saw, and other smaller cast iron. I hope to eventually obtain a nice size jointer and a shaper or two. My question is this, is the 1" over kill or do I need to go to 1 1/8" flooring here?

PS I am going with a crawl because it will only be about 6-10 feet from the house and its on a crawl as well......Don't really like concrete because it just doesn't last and the clay here in Ohio heaves a lot!!!!