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Old 08-20-2010, 10:29 PM   #1
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deck posts


It's probably a ridiculously stupid question but how are people attaching posts true and solid to decks?

If you are only attaching over a 10" board and the post extends 42" it seems really hard to get her rock solid. No?

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Old 08-20-2010, 11:58 PM   #2
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You are absolutely correct. "No" you will not get a good firm connection for a railing that way.

You don't "attach to", you "build them in".

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Old 08-21-2010, 01:11 AM   #3
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what willie said.
you don't build a foundation under a house, you build a house on a foundation.
The posts are your foundation. Your joists attach to it.

unless you're talking about railings?

Last edited by acerunner; 08-21-2010 at 01:14 AM.
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Old 08-21-2010, 08:52 AM   #4
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I attach the notched post to the rim joist from the inside. I use 2, 1/2" carraige bolts per post with the heads on the exterior. For the first year I periodically tighten the bolts as the wood dries and shrinks.
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Old 08-21-2010, 09:33 AM   #5
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Quote:
Originally Posted by Ron6519 View Post
I attach the notched post to the rim joist from the inside. I use 2, 1/2" carraige bolts per post with the heads on the exterior. For the first year I periodically tighten the bolts as the wood dries and shrinks.
Ron

My copy of code says you can't notch a railing post and if attached to a rim joist special hardware is needed. Apparently, people are leaning against the railing and it pry's the rim joist off.

I leave my posts whole and attach them to blocking placed between joists.
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Old 08-21-2010, 09:56 AM   #6
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Quote:
Originally Posted by 12penny View Post
My copy of code says you can't notch a railing post and if attached to a rim joist special hardware is needed. Apparently, people are leaning against the railing and it pry's the rim joist off.

I leave my posts whole and attach them to blocking placed between joists.
Thanks for the info. i'll check it out.
The last 2 decks I did passed inspection with this method. Both guys went under the deck to check it out. Usually they just look under and pull on the railing posts, but there had been a couple of deck failures lately in the news and I guess they were actually inspecting them now. One deck failure occurred on a second floor deck held to the house with nails and the other concerned and inadequate railing/post attachment.
Neither inspector questioned the post situation.
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Old 08-21-2010, 02:46 PM   #7
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First time I ever answered the same answer to different posts within an hour.

All my deck questions in here.

2006 Deck Code, figures #24-26: http://www.lancova.com/deckinfo.pdf Notice fig. 11 also.

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Old 08-21-2010, 05:55 PM   #8
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Here is a test done on deck posts. It was done by a company trying to sell a product but it gives some insights. It doesn't take much to get 200lbs lateral resistance. Note they used 16d nails to attach the 2x8 rim board. Also there is no deck board screwed to the top of the rim board which would have significantly increased the numbers.

http://www.livoutdoor.com/Brochures/...okTestData.pdf

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