Problem: No one here can give you any structural advice, as not a single question of yours may be answered properly - online. Every one of your questions revolves around the existing structural dimensions of your home, existing load designs, current footing dimensions , the existing roof dimensions and design, the post's dimensions, the existing frame's design, local code requirements, etc, etc...
Hire one of these: a qualified local architect/designer/construction company and they will be able to figure all that out for you (by inspecting, measuring, calculating, discussing things with you and most importatnly -by actually seeing your home.... which, again, none of us can do online).
They can tie the look of the new addition in with the design of your home, on an esthetic level, as well as the proper structural level.
- Build Well -
Last edited by AtlanticWBConst.; 10-29-2007 at 05:03 AM.