I have some concern about an existing beam we have on our covered patio. There is a span of 16 feet, achieved with a rough 6x6 beam of some kind. It is set on 6x6 posts. The 4 foot patio overhang is comprised of the same rough wood in 4x4's, 24 inches OC, with plywood + regular asphalt shingles. The span just looks very wide me and has less than one inch of sag in the center. We live in CA and the roof has nothing other than leaves on it in the fall. I would like to replace the beam and keep the existing span but the bottom of the beam is pretty low as it is...which is why I am guessing he went with a 6x6.
Have I provided enough info above to determine what size is appropriate...6x8,6x10,6x12?...Thank you! Height clearance is a concern...so I am really looking for the lowest profile...input on wood selection would be appreciated.