Quick Answer: Should I Use 4×4 Or 6×6 Deck Posts?

Will wooden posts rot in concrete?

Simply setting the posts in concrete does create a condition that will accelerate rot in the bottom of the posts.

With pressure-treated posts, the rot will be slow.

First, the posts should be set on top of a bed of coarse gravel 3 to 6 inches deep, so the base of the post is in contact with the gravel..

What size deck posts should I use?

As a general rule, if the support posts are spaced no more than 10 feet on center, all you will need to use are 4- by 4-inch posts. Most local building codes permit 4-by-4 posts 10 feet on center for all but multistory decks..

How do I secure my deck posts in the ground?

Insert an anchor bolt into theconcrete with no more than an inch of thread showing. To ensure the concrete form stays in place while curing, backfill the surrounding area with gravel. Once the concrete has completely dried, secure the post brackets with washers and nuts, then set pressure plates on top.

How far can a 2×6 decking span without support?

How far can a 2×6 Rafter span without support? The table states that 2 X 6 rafters spaced 16 inches on center (o.c) can span a maximum distance of 13 feet 5 inches.

How much can a 6×6 post support?

If you assume a conservative 1400psi allowable bending stress, a single 6×6 with 12′ span can support about 2000 lbs. So your double 6×6 can support at least 4000 lbs (possibly more if you do a good job bonding the two members together so that there’s no slip between the faces).

What size sonotube for a 6×6 post?

The pergola will dimension 11’x 11.5′ on center of post with 6×6 posts (4 posts), tied together with sandwiched 2×12 beams. I’ve laid out footer locations and am about to dig for 8″ sonotube forms.

How many footings do I need for a 12×16 deck?

four footingsA standard deck will need four footings parallel to the house, but they will need to be temporarily braced by 6 inch-by-6 inch posts. Using doubled boards, you will then need to build beams on the top row of the posts to frame the edges of the deck.

How do you secure a 4×4 post to a deck?

The quickest and most secure way to mount a wooden 4×4 or 6×6 deck post to an existing deck surface is via an OZCO Post Base Kit or a Titan Post Anchor. Both of these items provide a solid, powder-coated steel connection point for your wooden post to attach to surface below.

How long will a 6×6 post last in concrete?

40 yearsThe treated post that are rated for ground contact are guaranteed for 40 years.

Will pressure treated wood rot if buried?

Pressure-Treated Wood Makes the Grade Pressure-treated wood in contact with the ground needs the most protection, and will rot in just a few years if you use the wrong grade. … If your wood will touch the ground or be buried, you should get the highest grade you can, up to .

Is a 12×12 deck big enough?

A 12×12 deck is the perfect starter size, offering plenty of room for an outdoor furniture set. Enjoy an intimate evening with a friend or a solo night catching up with your favorite author’s latest.

How far apart should 6×6 deck posts be?

8 feetThe maximum spacing of 4×4 deck posts should be 6 feet on center, while the maximum spacing of 6×6 deck posts should be 8 feet on center.

How many 4×4 posts do I need for a deck?

The larger 12-foot side will have a post spacing of 6 feet at a minimum code requirement. That makes a total of eight posts that need to be installed on this average size deck. For aesthetic or symmetry reasons, more posts may be added.

Should deck post be set in concrete?

You’ll need the post layout marked before you begin. … There are several methods for setting posts. One way is to pour concrete in the post hole, set the post on the concrete and backfill with gravel. To help prevent rotting, this deck will have wooden posts attached to concrete footers above ground.

Are 6×6 fence posts better than 4×4?

Instead of 4×4 posts, go with 6×6 posts. The extra size makes a huge difference. It’s a smart place to invest a little extra in your fence, because if your posts distort after they have been set in the ground with concrete, they are extremely difficult to replace.

How far can a 4×4 span without support?

A 2×8 up to 12 feet; 2×10 to 15 feet and 2×12 to 18 feet. The larger the deck, the larger the joists. For best results, refer to our wood and composite deck joist span table.

Can I use 4×4 posts for my deck?

In the past, many decks were built with 4×4 support posts (also called structural posts). But these can bow seriously, even if a deck is only 3 feet off the ground. For that reason, we strongly recommend that you use 6x6s instead, even if your building department does not demand them.