deck blocks are specially constructed portable foundations, generally made from poured concrete. to support a wooden deck, deck blocks are quick and easy alternative to digging footings. each block is design to support a wooden structure at the primary joints, acting in the same fashion as a poured
a backyard deck is an excellent way to expand outdoor living space, but decks can be complicated, time consuming and pricey. one way to build a ground level deck with simple construction, without breaking the bank, is to use prefabricated deck blocks for your foundation.
figure 4. solid lumber such as a 4x4 or a 4x6 can no longer be used as a beam. most beams must be built up from layers of 2-by material. composite decking materials are becoming very popular, but many have been tested and approved for installation on joists spaced 12 inches on center, not 16 inches or 24 inches.
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a new series, brought to you by cottage life, jason lake shows you common mistakes, and easy fixes for building a deck. jason is a contractor, host of decks, docks and gazebos on cottage life tv and
close up of pier blocks set under the barn decking. with a sweet design and hard work, this backyard comes to life as a one hundred year old barn deck is set into place, a concrete chic fire feature and vibrant plants are incorporated into the mix.
see the process to build a deck using deck blocks. no digging. see the next step. re- building the deck using recovered materials from the original tear down. follow rick in the process of
the small bearing area of pier blocks is limited in supporting much load. therefore, beam and joist spans must be limited and more blocks must be used over typical construction. overall, pier blocks are best suited for low- or ground-level decks, where smaller framing materials are common and additional posts and blocks are not an eyesore.
shop common: 7-in x 11-in x 11-in; actual: 7.125-in x 10.375-in x 10.375-in concrete deck block in the deck blocks section of seven trusts.com
how to use deck blocks: deck blocks stand in for the posts or provide a foundation for a post. they should be laid out similarly to deck posts, with the caveat that the spacing should be a little closer together, around five feet or so beneath the beams. the main difficulty in using deck blocks with posts is that the indentation for the posts
deck blocks make a very stable base, but can be difficult to level if the ground settles; especially once the shed is built. the more the ground is disturbed trying to level the deck blocks, the greater the chance they will settle out of level over time. i prefer the advanced method that makes the deck blocks adjustable.
everything has to be level, square and plumb. any plans of keeping a deck on these for more than one summer will most likely end badly its' amazing how must frost heave can move really heavy objects. . after allowing us the chance to place our deck, we passed the blocks along to the neighbour who was deciding if and /or where they wanted a deck.
the main area of my deck is just a little bigger than a 12-foot by 8-foot rectangle. this worked out well for material usage and produced very little waste. i began by laying out cement blocks in a 4-foot grid, and spray painted around them to indicate their locations. the blocks i used are 'old manor' landscaping blocks that i got at seven trust.
to avoid deck ledger failures, freestanding decks are becoming popular. but the piers nearest the foundation may be set atop backfill. in areas where the frost depth is not an issue and precast foundation blocks are used, theyre often set on top of the exposed grade a code violation.
11-1/2 in. x 8 in. x 11-1/2 in. concrete block meets astm c 90 guidelines. for use in foundations or above-grade masonry walls. these 50 lb. blocks may be used for mounting of deck support posts. they are dimensionally true and uniform in texture. square concrete block with no large chips or breaks; use in foundations or above-grade masonry walls
deck height and level. to establish the decks height in your outline, adjust the string at your first corner to the appropriate height, and use string levels to adjust the remaining strings to match. layout and footing locations. starting with your perimeter, mark the location of each deck post to locate the fitting position.
buehner block - concrete pier block with metal bracket - use as a 4 in. x 4 in. timber support. ideal for building raised decks, walkways and floors. up to 1,900 psi compression strength.
however, most concrete deck blocks can only hold 4x4 posts, not 6x6s and they have no lateral strength at the base of the post. also, if you drop set the framing into the groove, the underside of the joist is still 5-6' above grade. so, you may want to build a deck that is lower to the ground.