New Deck - Gap Between Beam And Post Due To Shrinkage? - Building & Construction - DIY Chatroom Home Improvement Forum

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Old 07-05-2010, 06:56 AM   #1
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New deck - Gap between beam and post due to shrinkage?

I'm framing a new deck built post-and-beam style (no cantilevers) where the joists are in the same plane as the beams. The posts are 6x6 PT SYP on Simpson standoffs anchored to concrete piers, with Simpson Post/Beam connectors anchoring the beams to the post tops.

When I look at the post-beam connections today, I notice that on a few posts, a gap developed between the beam and the post. It's about a fingertip in size - maybe 3/8". I'm surprised that much of a gap developed between the post and beam when the beam was resting on the post two days ago and more than a dozen nails secured the connector.

I'm sure the posts were green, but I didn't expect that much shrinkage in a day or two. It's been brutally hot (+95F) and dry this week. So I'm thinking I should cut out those shrunken posts and replace them with larger ones from the same (now dryer) stock -- or just leave it alone in case (when wet) they'll expand a bit?

Thanks for any help.
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Old 07-05-2010, 06:57 PM   #2
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post don't shrink in the long dimension significantly [or at all] beams do shrink in width but that sounds like alot

Last edited by Tom Struble; 07-05-2010 at 07:17 PM.
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Old 07-05-2010, 08:40 PM   #3
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What model post/beam connector did you use and how many nails in each? The posts didn't shrink in length. I don't know of any way the beams would shrink away from the posts that much if connectors were nailed properly.
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Old 07-06-2010, 07:23 AM   #4
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I assume "concrete piers" means they are poured concrete and sunk into the ground and not sitting those concrete blocks that sit on top of the ground?
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