![]() The Footing of the Buried Post Pour a concrete pad at least 12″ thick at the bottom of the hole for this foundation option. Should deck footings be installed above ground level?īecause footings that are recessed below grade put the post-base connection at danger of being buried by backfill, and deck hardware is typically not approved for below-grade usage, piers should extend 4 inches or more above grade. For deck construction, precast concrete deck blocks are used. In most parts of the nation, this involves using code-approved metal connections to secure support posts to the foundation, or having the ends of posts placed on concrete deck blocks dug at least 12 inches below grade (the top of the soil). When concrete is poured around a deck post in this manner, moisture from the earth causes the post to decay. Is it necessary to place deck posts in concrete?īecause a deck post may shatter if it is put inside concrete, it should always be positioned on top of the footing. Between your horizontal corners, you’ll have two blocks and three blocks between your vertical corners. The inside blocks should be level with the corner blocks. How far apart should concrete deck blocks be placed?Įach trench line should have four inner blocks spaced 2 feet apart. However, this standard simply specifies the bare minimum. ![]() What is the maximum weight that a deck block can support?Īll concrete blocks must hold at least 1,700 pounds of weight per square inch, according to ASTM standards established in 2003 by an international building standards non-profit (PSI). You can construct a simple deck in a weekend with a little help and the correct equipment. Build a floating deck using precast concrete deck piers that sit directly on the ground. These boulders would have been significantly more resistant to crushing than current concrete blocks.Īnswers to Related Questions Is it possible to construct a deck without having to dig holes?įortunately, there is a simple, low-cost alternative to drilling holes for a deck. The purpose of the foundation, or concrete pad, as you may refer to it, is to uniformly disperse the weight applied on it across as vast an area as is required to sustain it. Measuring from the blocks’ centers, space the four corner blocks 10 feet apart along the long sides of the rectangle and 8 feet apart along the short sides. How many concrete deck blocks do I need here?Ĭreate seven rows of three concrete deck blocks by arranging 21 concrete deck blocks in a rectangle. Because they have so much dirt below them, they are the most prone to settling. Wait a few years, regardless of the kind of foundation you’re using, but particularly if you’re going to use deck blocks. Is it also a good idea to use deck blocks? Deck blocks may be useful, but there are a few things to keep in mind. Despite not being cast-in-place, they must meet all of the same standards as traditional footings. In many aspects, a deck pier block is a reduced form of a “precast foundation,” a foundation type that is recognized by building rules. Pier Blocks for Decks are made of concrete. Concrete deck blocks, on the other hand, may be utilized freely for a freestanding deck that is not linked to your home.Ĭan I use deck pier blocks instead of footings in the same way? To comply with standards, they must be put at least 12 inches deep in undisturbed soil, rather than just a few inches deep on the ground or on a poured concrete platform. Read more in detail here: how to use concrete deck blocks for posts. The answer to this question is the same as how you would use any other type of block: they are used in conjunction with each other and their purpose is to support weight, create stability and provide a surface on which to build. “How to use concrete deck blocks for posts” is a question that has been asked by many people. ![]() ![]() We can build the formwork for our deck using this pattern, or just lay down some predrilled holes with nails to create a grid. ![]() The deck blocks that we use in concrete construction often have a grid pattern on the top. ![]()
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