Wow...thanks guys. Good and thorough responses... I've been out of town for several days (w/o my laptop) @ this country property we are discussing. Sorry to get back to you all so slowly.
More detail now :The addition would be 19X 20 (possibly 22'). The ridge beam would be approx: 24' or 26' allowing for a 2' overhang on both ends. The roof pitch would be 1/1 or a 45 degree slant. (this permits a small loft on the 2nd floor). We would use a few cross ties in area not included in the loft.
I met with 3 contractors while there to get their plans, estimates to do the foundation, framing, roof , windows, siding, etc..I plan to do all the interior work myself including wiring ,some plumbing, etc. Each of the bidders is checking further the local building engineer, inspector and plan to get back to me in a few days (in the country that means a few weeks
). 2 of them are talking prelaminates and the 3rd, lacing together 2 2X10's.
The site itself is on a hillside with some slope so foundation will be piers driven 4 to 5 ' topped with 6X6 posts and a strong system of beams and joist.
Your advice is very helpful to me. Thanks... I'll continue to follow this thread..