Dadoing ledger into exterior stud wall

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  #1  
Old 08-06-17, 05:57 PM
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Dadoing ledger into exterior stud wall

Looking at my loft design some more I was wondering if I didn't need to double up the back ledger that I'll be attaching to the 2x6 exterior wall studs of my shop. It occurred to me that I could instead dado the back ledger (shown in red) into the stud and instead rest the floor joist on top of the ledger, while also securing to the joists to the 2x6 studs.

Any concerns with dadoing the exterior wall studs? I will be doing it across all the studs in the rear wall, but especially filling it in with the 2x8 I don't see this reducing the strength of the wall any.

Original design:
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Proposed design:
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Old 08-06-17, 06:16 PM
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IRC SECTION R602.6 (1): Any stud in exterior wall or bearing partition may be cut or
notched to a depth not exceeding 25% of its width.

In view of the above code, no you cannot notch your load bearing wall for a ledger. You attach the ledger with lags.
 
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Old 08-06-17, 06:43 PM
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Ah, so the max dado I could cut is 1-3/8". Perhaps I could just recess the ledger that much, still attaching with LedgerLoks. I'm trying to avoid having to double up the ledger, and having the ledger bear on a surface seem to be structurally stronger. In addition, not having to use joist hangers on one side is appealing.

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Old 08-06-17, 07:35 PM
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Why do you think you need to double your ledger? You dont need to notch and you dont need to double.
 
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Old 08-06-17, 08:32 PM
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Will a hanger be in well enough with a 1-1/4 nail? I thought you were supposed to use 16d and go into the second board?

Either way it would be both structurally stronger and easier to put up the joists on that side.
 
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Old 08-06-17, 08:39 PM
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Depends on the hanger you use but you would use joist hangers and 1 1/2" 10d hanger nails. No need for double cross shear hangers. If you rest them on top you need blocking between them.
 
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Old 08-06-17, 08:47 PM
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" If you rest them on top you need blocking between them."

Could I not just nail them to the wall studs as well?

Saw your post about the fire barrier. Like this then:

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Last edited by Temp08; 08-06-17 at 09:12 PM.
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Old 08-06-17, 09:23 PM
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My phone is deleting my posts if I try to edit them, sorry.

Blocking is a perpendicular board placed vertically that you have to place between the joists when you use balloon framing. (Not like what you have drawn) It fully closes off the wall space from the deck. Its also called fireblocking.

Balloon framing is not an efficient, modern framing technique as it creates the potential for more air infiltration and reduces the amount of insulation in the wall behind the ledger. You would likely need the permission of your framing inspector to build it that way.
 
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Old 08-06-17, 09:43 PM
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Yeah this is inside my shop that's already built.
 
 

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