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Old 05-05-2008, 05:26 PM   #16
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Deck Building Question - Installing Ledger Board to Rim Joists


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Originally Posted by Ler0y Jenkins View Post
I'm not sure I understand. The area of influence must be limited in some way or every footing would eventually interfere with another footing, right? What I mean is, even if the footings are ten feet apart, a diagonal line drawn at 45 degrees from the base of the footing will, eventually, intersect with the line drawn off of the other footing, right?
The area of concern is primarily immediately below the footing, where the majority of the compressive load is placed on the bearing soil:



It's not the end of the world obviously, since we're just talking about a deck, but something to look in to. I noticed you've placed the two adjacent footings at a corner condition. Why not just one post placed directly below the corner itself? I can see some trouble trying to excavate those two holes so close together, and I can imagine your inspector wondering the same thing when he comes out to inspect the holes prior to concrete placement.


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Old 05-06-2008, 08:22 AM   #17
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Deck Building Question - Installing Ledger Board to Rim Joists


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The area of concern is primarily immediately below the footing, where the majority of the compressive load is placed on the bearing soil:



It's not the end of the world obviously, since we're just talking about a deck, but something to look in to. I noticed you've placed the two adjacent footings at a corner condition. Why not just one post placed directly below the corner itself? I can see some trouble trying to excavate those two holes so close together, and I can imagine your inspector wondering the same thing when he comes out to inspect the holes prior to concrete placement.
Do you have a picture of what you are referring to? I'm just trying to figure out how to attach two beams (one of which is at a 45 degree angle) to the top of one of the posts??
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Old 05-07-2008, 08:46 AM   #18
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Deck Building Question - Installing Ledger Board to Rim Joists


Update:

Building inspector came out and said as long as I through-bolt the ledger board to the rim joist, he'll approve it. He wants 1/2" bolts every 16" staggered (up and down). That's fine with me, makes the whole process a lot less complicated than having to installing blocking, etc.
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Old 05-07-2008, 09:53 AM   #19
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Deck Building Question - Installing Ledger Board to Rim Joists


Your sketch shows one post setting are a cement slab. Hope you are going to cut the slab and pour the required footing. Don't think that it will pass code sitting on a 6 inch pad. Nice project.
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Old 05-07-2008, 10:46 AM   #20
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Deck Building Question - Installing Ledger Board to Rim Joists


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Your sketch shows one post setting are a cement slab. Hope you are going to cut the slab and pour the required footing. Don't think that it will pass code sitting on a 6 inch pad. Nice project.
Thanks. I have some concern about that but I spoke with a friend who's an engineer and he seemed to think that as long as the slap is more than 4" thick, based upon its size (6' x 10'), it should be sufficient.

I submitted it that way in the plans. If the building inspector objects, I can always change it.
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Old 05-18-2008, 12:05 PM   #21
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Deck Building Question - Installing Ledger Board to Rim Joists


The spacing of the lags/thru-bolts in the ledger board depends on the size and span of your joists. Code books have this info.

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