Depth
x Length
14
foot decks use the total length of the joist available for 16 inch
spacing, and give you the most square feet for your dollar.
If you go farther than 14 feet, you must add another row of posts
or move the joists closer together.
The
most efficient size is the 14 x16, which uses the
full length of the available lumber and can be built on one row of
footings/posts.
However,
to go 14 feet out, the joists must be cantilevered
over the top of a beam. This puts the posts back about 2
feet from the far edge of the deck and complicates any future 3 or
4season porch plans* you may have for this deck down
the line.
Longer
Decks can be split into two levels at a very small cost.
*as
always, porches require larger footings than
the deck, so be sure to consider this before footings are poured.
