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Old 11-03-2016, 07:47 PM   #1
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Deck post attachment?


Hello
I need to re-attach the posts (4x4 - pressure treated) on the rim joists of my deck
It seems the standard is to use 1/2 carriage bolts......but what if I were to use 3/8" carriage bolts (2 by posts) instead? Or 3/8" lag bolts?
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Old 11-04-2016, 08:32 AM   #2
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Re: Deck post attachment?


Really willing to risk a deck failure to save a dollar?
It would be interesting to see a picture of how you plan on doing this.
Most places have newer codes that do not allow post to just be bolted to the side of a rim joist and require at least a 6 X 6, not 4 X 4 post.
Lags have little holding power, 3/8" bolts do not have enough shear strength.
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Old 11-04-2016, 08:45 AM   #3
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Re: Deck post attachment?


I've never said it was about cost saving........
Just want to know if 3/8" carriage bolt are OK or not, or lag bolts such as the 'Headlock" form FastenMaster:
http://www.homedepot.com/p/FastenMas...2-50/202268258
And by the way, my deck is "only" 30" high.....
If attachment on rim joist is not allowed, how it should be done then???
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Old 11-04-2016, 10:00 AM   #4
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Re: Deck post attachment?


You may want to review the Prescriptive Residential Wood Deck Construction Guide, available here at no charge http://www.awc.org/codes-standards/publications/dca6, to see how the Guide recommends attaching posts to beams. You may also want to discuss the project with your building inspector, as your local jurisdiction may use a different code than the Prescriptive Guide.
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Old 11-05-2016, 05:43 PM   #5
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Re: Deck post attachment?


are the posts for handrail or are they the ones supporting the deck itself.

if its handrail posts i dont even bother with carriage bolts or lags at all, i simply set them to the inside of the rim and use blocking to lock them inplace.. its stronger than simply using lags
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Old 11-05-2016, 06:42 PM   #6
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Re: Deck post attachment?


Not saving a buck, just a lot of time from drilling required holes. I have never used fasten master but we use ledger lock brand for a ton of things....including ledger to rim, deck posts to side of deck, stair carries to framing, etc. they drive in easily and with no effort using an impact driver. Nothing to drill. Put the point of the thing against the wood and pull the trigger. Five and a half inch ledger lock in through whatever in a few seconds. Ron
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