I'm building my shop. I've used 2x6 joists on 16" centers with the longest span of 5'. I've put 3/4" ply over the joists that will be covered with 7/8" pine boards. I gave the 230 lbs.(me) jumping test on an individual joist before I put the ply on the joists. It didn't budge. I'm trying to decide how heavy a machine I can put on this floor. Does anyone have any experience, or know where I can look for more information? Code tells me I can use 2x6 on 24" centers with a span of 7'. So, I'm well within those specs. I couldn't find any information specifically about shops. The heaviest machine I'm contemplating is 463 lbs. Having used only a radial arm saw and hand tools in the past, I don't have experience with heavy machines. I'm not sure what kind of weight a floor like this will be able to hold.
John