Do deck posts need concrete footings?
Large decks that are attached to the house should always have footings because they act to spread the heavy load of the deck from the surface of a support post over a large surface of the soil so the ground can adequately support it. The footings ensure that the deck will not fall, tip or rot away after a few years.
Can deck posts sit on concrete?
A deck post should always be placed on top of footing, not inside concrete because it can break. When concrete is poured around a deck post in this way, the post will rot due to moisture buildup by the soil.
What is the best concrete for deck posts?
Decks and other permanent structures require deck supports and footings made from structure strength concrete mix. QUIKRETE 5000 is recommended for footing applications because of its heavy duty, 5000 PSI strength. Add the QUIKRETE 5000 concrete mix to the form.
How thick does a deck footing need to be?
Assuming a minimum soil bearing capacity of 1,500 psf, 8-inch-diameter concrete piers bearing on square footings measuring 2 feet on a side and 9 to 11 inches thick are adequate for most single-story decks where beams are spaced 14 feet apart or less and joist spans are 14 feet or less (see table below).
How long will treated post last in concrete?
A PT post will last a long time in concrete, maybe 5 to 10 years in soil alone. I suggest you embed the post in concrete, trowel a peak around the post so water runs off, and don’t let the PT post come in contact with the ground.
What size footings are required for decks?
Sizing Deck Footings Assuming a minimum soil bearing capacity of 1,500 psf, 8-inch-diameter concrete piers bearing on square footings measuring 2 feet on a side and 9 to 11 inches thick are adequate for most single-story decks where beams are spaced 14 feet apart or less and joist spans are 14 feet or less (see table below).
Can I build a deck on concrete?
Yes. You sure can. This is a very common request. In fact, not only can you build a deck over a concrete patio, doing so provides a moisture barrier. That’s right—the concrete can act as a barrier between the soil and your wooden deck to prevent excess moisture exposure.
What is a post anchor?
In simple terms, a post anchor is a bracket that holds a post. The sort of post anchors we’re talking about have a long, four-flanged metal spike on the other end. The pointy end is the anchor, and this is driven into the ground. Then the post simply mounts into the bracket on top.