A 12×16 foot deck is one of the most common residential deck additions. Spanning 12 feet out from a 16-foot house ledger, it provides 192 square feet of outdoor living space. Built with 2×8 treated joists at 16" on-center, it provides a solid, zero-bounce sub-structure.
Yes. Southern Pine or Douglas Fir #2 pressure-treated 2x8 joists spaced at 16 inches on-center have a maximum allowable span of 12 feet 6 inches under standard 40 psf live load.
With 16-foot long boards running parallel to the house, you need 26 rows of 5.5-inch wide boards. With a 10% cutting and sorting waste buffer, order 41 16-foot decking boards.
For a 16-foot drop beam supported by posts spaced no more than 8 feet apart, 3 concrete footings are required (one at each end and one centered).