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The size of the deck directly affects the spacing of the support posts.
Deck post spacing. Below we ll take a look at some of the main considerations when asking how far apart should deck posts be. Most decking is not strong enough to support longer spans than 16. If you are planning on installing a hot tub or porch on top of your deck you will usually need more footings and posts to support the additional loads. For proper spacing holes for the deck bolts should be placed in the center of the post at least 1 5 to 2 inches from the bottom and the top of the frame.
The distance between deck support posts depends on the type of wood species used and the size of the joist and beam. Post spacing is going to depend on your design local building codes the size and length of your beams and the size of your posts. The shorter sides in this case the 8 foot side will have 4 feet of distance between deck posts. Once you decide the distance measure from the house for the first row of boards.
The required width of a joist depends on its span. Typical post size is a pressure treated 4 4. Vertically space the bolts no less than 5 and 1 8 inches apart. The maximum distance between footings is determined by the size of your joist material.
Ideal deck post spacing is 8 feet or less. Most decks use 16 on center spacing for joists. Some builders position them every 4 feet for a completely rigid frame. In general posts should be spaced no more than 8 feet apart.
This will ensure that there is enough material surrounding each bolt to prevent weaknesses around the holes. Size of the deck. Joist spacing for composite decking. How far it must travel between beams or between a beam and a ledger.
What is the required spacing for deck posts. Deck footing spacing and layout the larger the beam and footing size the fewer footings that are required. Starting with your perimeter mark the location of each deck post to locate the fitting position. It also depends on the joist spacing.
Some builders reduce joist spacing to 12 on center to strengthen the deck frame or to increase maximum allowable joist spans. There is no minimum span and maximum spans can reach up to 15. Post spacing should be even. Most backyard decks using wooden posts.
See the deck joist calculations below and study your local code. The larger 12 foot side will have a post spacing of 6 feet at a minimum code requirement.
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