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Old 05-08-2008, 12:36 AM   #1
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Deck Ledger Connection Question

I am planning on adding a deck to my house and have found something interesting I do not quite understand.

I have a concrete foundation about 10" above ground and then a transition to a brick. My Ledger board should cover about 4 inches of the concrete and 6" of the brick. I drilled a pilot hole through the brick, and am able to hit the air gap and then get to my house joist. The odd thing is there is about a 3" air gap. I am assuming this is for the 2x4 framing. I have seen posts where people are using a carriage bolt assembly to connect through the house joist, but will I be ok to use a 1/2" diameter by 10" carriage bolt. I am thinking 10" because I have the 2x10 ledger, 2 1/2 " thick brick, 3" air gap, and 2x10 house joist giving about 2 inches for the washer and nut.

I also based on spacing requirements of joist connections would like a 4" anchor bolt on the concrete.

Please comment on this will give the structural stability I need for the ledger.

Thanks for the help, much appreciated.

- Fred


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Old 05-08-2008, 11:52 AM   #2
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Fred; tho it sounds feasible, a call to the building dept is in order :{ It will have to be permitted and you are better off starting off on the right foot. Make a sketch,go to inspector CYA


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Old 05-08-2008, 01:13 PM   #3
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Deck Ledger Connection Question

Building a ledger supported deck is not a great idea because of the structural and moisture problems. - Especially with a brick veneer where a void is required.

Some areas do to allow ledger supported decks and only permit free-standing decks.

You will get no vertical strength out of 10" bolts with a 3" gap in the middle. What is going to prevent the ledger from collapsing the air space to nothing as you tighten it?
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