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The size of the deck directly affects the spacing of the support posts.
Deck support spacing. For instance joists that are placed 24 inches apart must be wider than joists placed 16 inches apart. There is no minimum span and maximum spans can reach up to 15. The required width of a joist depends on its span. Some builders position them every 4 feet for a completely rigid frame.
It also depends on the joist spacing. Or if your deck has many angles additional footings are necessary. A 2 2x10 can span 10 feet and so on. The maximum distance between footings is determined by the size of your joist material.
A double 2x12 beam can span 12 feet. How far it must travel between beams or between a beam and a ledger. However if your deck will include a hot tub or roof you must support that weight with additional footings. What is the required spacing for deck posts.
Most decking is not strong enough to support longer spans than 16. In general posts should be spaced no more than 8 feet apart. Most decks use 16 on center spacing for joists. Dimensional lumber deck beam span chart the numbers in gray indicate the distance between the support posts.
Ideal deck post spacing is 8 feet or less. Some builders reduce joist spacing to 12 on center to strengthen the deck frame or to increase maximum allowable joist spans. Joist spacing for composite decking. Starting with your perimeter mark the location of each deck post to locate the fitting position.
When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches. If you re building a simple deck footings and posts should be placed less than 8 feet apart. Below we ll take a look at some of the main considerations when asking how far apart should deck posts be. The type of post you use can also affect the spacing between posts.
The distance between deck support posts depends on the type of wood species used and the size of the joist and beam.
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