I'm building a 10' by 16' shed/workshop, and I'd like to use preformed concrete pier blocks. Is this a sufficient foundation for such a structure in a seismically active region like the Pacific Northwest?
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Yes , pier blocks are great for sheds make sure you have enough for your project. I usually dig down 1/2-2/3 the height of the pier block to get below the topsoil this reduces the amount of settling and any issues with frost heave in the winter, luckily our winters are not as cold as the Midwest and back east. So frost heave is not much of a problem with the pier dug in, this also reduces the step up.
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For a 10x16, how many are "enough"? For a 10x10 near Napa valley I was considering four concrete pier to counter my fears of the shed sliding – dabi Aug 22 '19 at 16:57
