How Many 6x6 Posts For Deck

Maximum cantilever of a double 2x8 beam past a support post is.

How many 6x6 posts for deck. The longer the joist the more area of deck the joist supports and thus the beam supports. Most professionals will encourage you to consider going with a 6 6 deck post form the outset of the project. So build your deck the right way from the ground and posts up. Maximum joist span of a 2x8 is 10 6 at 16 o c.

Bulk galvanized steel elevated post base. Simpson strong tie mpbz zmax galvanized moment post base for 6x6 nominal lumber with sds screws model mpb66z 162 67 162 67. For most situations you will want to place footings and posts less than 8 apart. You ll need the post layout marked before you begin.

A span is the unsupported distance between two posts. A plain 200 square foot rectangular wood deck with posts and rail fencing will cost around 1 000 3 000 for parts and lumber. Remember to follow local code for deck posts. Owt ornamental wood ties laredo sunset lite 6 in.

For details on creating a post layout see how to build a deck. Many contractors and deck construction guides such as the popular dca 6 09 from the american wood council have simply defaulted to using 6x6 posts in all applications but many other builders and how to guides rarely use anything other than a 4x4. The size of the deck directly affects the spacing of the support posts. For pressure preservative treated southern pine no.

The average size for a deck is between 200 and 500 square feet. 2 grade there is a method that can be used for estimating beam spans for a preliminary design. Maximum cantilever of a 2x8 is 24 at 16 o c. The larger the beam and footing size the fewer footings that are required.

Set your store to see local availability add to cart. The answer depends on the size and shape of your deck the size of your footings and the size of your beams. A cantilever is the unsupported end of a joist that extends past the last support post at the edge of your deck. 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.

Building codes for residential decks only require 40 psf. According to building codes there is no clear answer on when you should install a 4 4 vs. However experienced contractors will tell you that a 4 4 post simply can t carry the heavy load that many porches require. One way is to pour concrete in the post hole set the post on the concrete and backfill with gravel.