Using my span tables, if you cantilever the joists 2 feet over the beam you will need 2x12's on 12" centers with bridging and strapping. The clear span for posts can about 8'8" which means for 3 posts cantilever the beam ends about 15". The beam should be 4 2x10's which will fit nicely over a 6x6 post.
Keep in mind that span tables for your area may be different. Also check the local authorities for info on concrete pillar construction.
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Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org
Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .
_________________________
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.orgBarton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .