How far apart should deck pier blocks be?

How far apart should deck pier blocks be?

the maximum beam span between supports, the deck blocks is 8′ (2.4m), and the minimum is 4′ (1.2m) according to the residential deck guide. So, the max distance between deck blocks is 8′ (2.4m), and there is no need to have them closer than 4′ (1.2m).

Can you build a deck with pier blocks?

Pier blocks can be used instead of footings for a ground-level deck not requiring permits. Piers blocks can also be used if the frost level depth is less then the height of the pier block. Allowing you to set the pier block below the frost level on stable ground.

What is a deck pier block?

What are Concrete Deck Blocks? A deck block is in many ways just a simplified version of a “precast foundation,” a foundation type recognized by building codes. They’re subject to all of the same requirements as a typical footing, regardless of not being cast-in-place.

How much weight can a pier block hold?

A single 8” x 16” concrete block can carry 8,000 lbs. Don’t go over 36′′ high. The single blocks that can be used for your pier can easily carry 5,500 lbs. They limit a dry stack, single block pier to 5,760 lbs.

Do concrete deck blocks sink?

The deck blocks can sink if the soil under them erodes for some reason or the weight is unevenly distributed. That’s why it’s a good idea to use more than less.

What do you put under deck blocks?

Sand or gravel under the blocks works best because these materials don’t change with seasonal freeze-and-thaw cycles. They allow water to seep away in the fall, eliminating frost-related heaving in the winter. Heavy clay soils, on the other hand, can rise and fall substantially because they hold so much moisture.

How much weight can a deck block support?

All concrete blocks must support at least 1,700 pounds of weight per square inch according to standards published in 2003 by the international building standards non-profit.

Do deck blocks sink?

Do I need gravel under deck blocks?

Gravel sitting under the deck block allows quick drainage, not damming the water preventing it from being absorbed by the ground under the deck block. Also, gravel is the most stable material with great bearing capacities. A deck block with compacted gravel under it will support more weight than the other two options.

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