how install concrete deck footings this is a tutorial that shows a step-by-step method for installing concrete deck footings , specifically for a low deck or wood patio. there are a variety of ways to do this, of course, but this is a very fast and relatively simple way that weve used for multiple projects with excellent results.
if your deck is 6 feet or less with proper post to beam and joist bracing, it is a perfect candidate for a floating deck. this means you have options for your deck foundation that can save you time, money and effort. here are your deck footing options: surface deck blocks; engineered helical piers; ground spikes; ground screw anchored footings
this could mean the need for 3-ft.-deep footings in some areas. however, if the piers are in a backfill region, as is the case with piers nearest the house on a freestanding deck, the footing depth may have to be as deep as 10 ft. to reach undisturbed soil and to comply with code. i am now worried that these footings may be less stable.
question: im building a detached deck in my backyard and want to pour concrete footings for the posts to stand on. how deep do i need to dig before i can pour? kevin h., greenville, sc. answer: hey kevin, that has a lot to do with where you live, because the most important factor involved is the frost line. in moderate to cold climates, frost will penetrate into the ground when air
when building a deck on a home with a full basement or clspace foundation, assume that there was an area of overdig when the foundation was built and that the earth up to 5 feet or maybe more around the house was excavated and backfilled thus disturbed .
if your deck is like most where it has two wooden deck posts and a rim joist that is bolted to the house, each of the two deck post holds up approximately 25 percent of the total weight. in your case, the soil under each deck post may be called upon to support 3,000 or more pounds without flinching.
if no concrete pier is used, the post should bear on the footing and stringers should bear on 2x4 blocking fastened to 4x4 posts with 8x3-1/2' screws or 16d nails. if the stairs are resting on a concrete slab or a patio then the slab or patio should also be built with a similar foundation to resist frost movement.
there's a cool new product in town that's making deck footings way faster and easier to install; it's called a diamond pier foundation system. a new type of deck footing: diamond piers. by
depth of foundation. beyond that minimum depth requirement, there may also be a requirement for frost protection of the foundation, established by the local building department. for freestanding decks, no protection is required; for all others, foundations may need to be as deep as 48 inches, or perhaps even deeper.
slab foundation for cold climates. foam insulation below the concrete makes deep footings a thing of the past. it's time to consider helical-pile footings. steel piles screwed into the ground can support anything from mailboxes to houses. laying out deck footings. a fast and accurate way to get the holes in the right spots.
start by laying out the location of the deck foundation so its square and level with the house and at the proper height to line up with the interior floor. mark the location of the footings for the deck on 8 centers, and dig 2x 2 holes that are 2 deep.
if the deck will be built at the same time as the house, have both foundations dug at the same time. 1.4 - dig holes 54' deep and large enough for 24' forms. 1.5 - build 24' square forms using 2' × 8' boards.