What are the lumber dimensions for framing?
Typical deck: Post: 6×6 / Ledger: 2×8 / Joist: 2×8 12″o.c. Most decking boards have a maximum span of 16″ o.c. With a diagonal layout your joist is 12″ o.c. If you layout is parallel with the house your joist can be set at 16″ o.c. For heavier loads 2×10 is used. The framing perimeter of your deck is always a double member. Your contractor will give you a set of plans to verify all the lumber and spacings.