Composite deck joist space.
Floor joists for deck.
In typical deck construction with a ledger on one side of the joist and beam on the other the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above.
If adding additional framing be sure to keep all boards level and in plane across the tops.
I prefer to double the outside joists as do some deck builders which adds 2 joists for a total of 11.
Here s a helpful chart covering the most popular wood framing species and their maximum allowed spans.
The larger the deck the larger the joists.
For a more rigid feel 12 or less may be preferred.
For best results refer to our wood and composite deck joist span table.
The thickness of plywood panels in a subfloor is regulated by the.
The finished floor is then installed on top of the subfloor.
Nine joists will be needed for the 16 foot width.
Deck joists have a different maximum span length depending upon the size spacing and framing material that you re creating your deck with.
The bigger you make your deck the more you ask of the framing timbers that hold up the deck s structure and the joists and beams that support the deck s floor can only span so far before the.