Hello from Alabama,
I'm building my own 30'X48' Garage (Man Cave as the wife puts it)..
I'm doing mine using the post and beam construction method. Post being 6x6 (actual size being 5.5X5.5). Beams being 6x8 (5.5x7.25). Post will be spaced 12' O.C. along the 48' length for a total 10 post...