Wood Post On Patio Over Footing Code ? - Framing - Contractor Talk

Wood Post On Patio Over Footing Code ?

 
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Old 07-27-2015, 06:50 PM   #1
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Wood Post On Patio Over Footing Code ?


I had an inspector call me on a 12x12 timber post that sits on a porch and on a back patio slab (with the footings directly under the slab where they sit) saying they need more clearance off the slab itself. He said it needs 1 inch of clearance off the slab. We've done timber work with metal base plates that are about 3/16" thick for years and never had this come up. It doesn't have a stone base or anything to trap the water. Anybody know where this code reference is and if this is legit? Thanks.
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Old 07-27-2015, 08:17 PM   #2
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Re: Wood Post On Patio Over Footing Code ?


R317.1.4 Wood columns.
Wood columns shall be approved wood of natu
ral decay resistance or approved pressure
preservatively treated wood.
Exceptions:
1. Posts or columns which are either exposed
to the weather or located in basements
or cellars, supported by piers or metal pede
stals projecting 1 inch (25.4 mm) above the
floor or finished grade and 6 inches (152
mm) above exposed earth, and are separated
there from by an approved impervious moisture barrier.

http://publicecodes.cyberregs.com/ic...2_3_par232.htm

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Last edited by hdavis; 07-27-2015 at 08:31 PM. Reason: correct section add link
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Old 07-28-2015, 03:57 PM   #3
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Re: Wood Post On Patio Over Footing Code ?


Thanks. We are going to cut it back and pack non-shrink grout under it at this point as a fix as that seems to be possible with this code.
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Old 07-28-2015, 07:49 PM   #4
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Re: Wood Post On Patio Over Footing Code ?


Quote:
Originally Posted by jakejorgenson View Post
Thanks. We are going to cut it back and pack non-shrink grout under it at this point as a fix as that seems to be possible with this code.
I don't have a 1" standoff solution for a 12x12 post other than custom, but I doubt that the grout fix is going to pass either as it will wick moisture from the slab up into the timber post. The point of the standoff is to separate the post from moisture holding materials.

Usually, non-shrink grout is packed under steel posts or columns once the column is set to height and plumbed.

Last edited by Windwash; 07-28-2015 at 07:51 PM.
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Old 07-28-2015, 09:40 PM   #5
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Re: Wood Post On Patio Over Footing Code ?


Quote:
Originally Posted by Windwash View Post
I don't have a 1" standoff solution for a 12x12 post other than custom, but I doubt that the grout fix is going to pass either as it will wick moisture from the slab up into the timber post. The point of the standoff is to separate the post from moisture holding materials.

Usually, non-shrink grout is packed under steel posts or columns once the column is set to height and plumbed.
It'll work as long as he has a capillary break - a simple sheet of galvanized steel over the end is pretty traditional. Lots of options there.
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