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Old 08-25-2009, 09:57 PM   #1
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flare out bottom of deck pier hole?


i dug a hole 8.5" dia 4' straight down using a post hole digger. i want to flare the bottom of the hole to assist in preventing frost jacking. i tried using a garden hoe but i had no leverage at all with which to dig out the sides of the pier hole.

any ideas on how to do this effectively?

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Old 08-25-2009, 10:24 PM   #2
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flare out bottom of deck pier hole?


That's a mighty narrow pier and it'll be hard to get much angle at the bottom. It it were wider a sharpshooter shovel usually does the trick, and you clean out the spoils with the hand posthole digger.

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Old 08-25-2009, 10:44 PM   #3
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flare out bottom of deck pier hole?


If for frost heave prevention, it needs to be wider for the gravel under and around to keep the water from freezing: http://books.google.com/books?id=1gg...num=3#PPA31,M1 Plastic wrapped, footings attached, etc.

http://rockproducts.com/mag/rock_agg...prevent_frost/

http://www.sustland.umn.edu/implemen..._footings.html
I gave you three, because I know how you like to read....

And some added protection: http://www.oikos.com/esb/43/foundations.html
Be safe, G
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Old 08-26-2009, 04:26 PM   #4
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flare out bottom of deck pier hole?


OK, i hear you. "don't be lazy, dig a bigger hole."
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Old 08-26-2009, 06:14 PM   #5
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flare out bottom of deck pier hole?


GBR, you always come up with some of the most interesting reading!
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