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Old 04-17-2013, 11:26 AM   #1
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Deck Footing Question


Hi All- New to the forums. I have an 8 year old deck that seems fairly solid for the most part. I've noticed the last 2 winters, however, that part of the deck (where the stairs start) seem to rise when the ground freezes (am in MN). This part happens to be under a post which is sitting on a footing. My hunch is that the footing is not deep enough and is being pushed up with the freeze, then settles down with the thaw. Any thoughts?
I would like to remediate- do i put a temporary brace up then re-pour a deeper footing?

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Old 04-17-2013, 11:59 AM   #2
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Deck Footing Question


Got a picture?
And your right the footing was not deep enough.

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Old 04-17-2013, 12:02 PM   #3
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I will snap one later today and post back....
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Old 04-17-2013, 08:06 PM   #4
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Here are some pics- Not sure if they'll help.
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Deck Footing Question-img_0832.jpg   Deck Footing Question-img_0833.jpg   Deck Footing Question-img_0834.jpg   Deck Footing Question-img_0835.jpg  
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Old 04-17-2013, 09:24 PM   #5
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Deck Footing Question


it could be caused by not installing the footing below your frost depth. it could also be that the frozen ground was able to grab the side of the sonotube and force it upward. make sure to check all of your deck connections to ensure they are still tight, sometimes movement can loosen connections.
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Old 04-17-2013, 09:41 PM   #6
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Thanks for the response- Any suggestions on how to remediate? Will going with a deeper footing prevent either one of the scenarios you mentioned? Thanks.
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Old 04-17-2013, 11:40 PM   #7
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Page 19, Fig.34; http://www.awc.org/Publications/DCA/DCA6/DCA6-09.pdf

42-60+"; http://www.soundfootings.com/pdf/US_...t_DepthAVG.pdf

Use gravel under the new footing for drainage; http://www.sustland.umn.edu/implemen..._footings.html

http://www.waltersforensic.com/artic.../vol1-no11.htm

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Old 04-18-2013, 09:26 AM   #8
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Thanks Gary- good resources...

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