Reply by Finisher

You don’t mention what your 4×4’s are resting on? But, 24” center to center joist spacing is acceptable in construction that uses floor trusses and that type of floor I think is rated at 400 lbs. per square foot. The problem does exist of floors bowing a bit when you walk over them so I would think this would be a concern but if you are not experiencing that now you shouldn’t be concerned.

-- James, Michigan http://www.northcapecabinetsandmillwork.com