Deck Support Spacing

The longer the joist the more area of deck the joist supports and thus the beam supports.

Deck support spacing. No building permit is required. Deck layout and footing position spacing. 2 grade there is a method that can be used for estimating beam spans for a preliminary design. If you install your decking using wet boards pressure treated decking that has not yet dried out then you should install them with no gap as a gap will be created as they dry and shrink.

1800 242 3447 for no cost utility marking. The size of the deck directly affects the spacing of the support posts. Proper deck board spacing should have a 18 inch gap after the decking has dried out. 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.

While a 16 foot by 16 foot backyard deck for recreational purposes such as an outdoor kitchen and general lounging may only require deck posts spaced every 7 feet a larger deck may require that the spacing be narrowed down to within 5 feet. However if your deck will include a hot tub or roof you must support that weight with additional footings. Recommended beam joist spans for deck framing. Joist layout ideas for stronger decks consider span spacing and depth to build beyond code for a small upcharge.

Codes dictate how high the railing must be as well as how far apart the balusters can be. Deck design guide use this guide to help you build your deck. A deck more than 2 feet or two steps above ground must have a railing. The bigger you make your deck the more you ask of the framing timbers that hold up the decks structure and the joists and beams that support the.

If youre building a simple deck footings and posts should be placed less than 8 feet apart. A cantilever is the unsupported end of a joist that extends past the last support post at the edge of your deck. Most deck builders would typically support the free end of a deck this size on a beam made from two 2x12s supported on three posts set 7 feet 6 inches apart. For deck height the distance of deck walking surface to ground level at the highest point adjacent the deck of up to and including 06m.

Deck spacing isnt anything to take lightly. For pressure preservative treated southern pine no. Building codes for residential decks only require 40 psf. Small children must not be able to climb it.

Deck layout and footing position spacing. Changing joist span depth and spacing has a dramatic effect on. Maximum joist span of a 2x8 is 10 6 at 16 oc.