I will be building a 12′ X 24′ deck soon. One side will be almost on grade and the other will be about 12′ above grade. The home is brick and I plan to hammerdrill through it and lag bolt my ledger board to the rim joist. My problem is that I can only do this for half of the deck. Half of the deck extends behind a carport. The carport is also brick and it has 8″ cinder block behind that. A the level of my ledger board, it is a poured concrete slab on grade behind the block. How do I attatch my ledger through the brick and block into the slab? I thought about using threaded rod and one of the epoxy injection systems by Hilti or Simpson. Any ideas?
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I wouldn't mess with the block.....may not even do the brick to the rim joist penetration unless I was positive that I wouldn't be letting water travel down the lags and into the rim. Some would say that's a stretch, but I like to get ice and water behind my ledgers to seal off the lag or bolt penetrations. Some say flashing the top of the ledger is enough.
I'd do the whole thing free standing with footings, beam and posts up near the existing structure. I certainly wouldn't try to attach the ledger to block.
But....in the immortal words of Mike Smith......"Hey whaddda I know?"
I can't really do it free standing because there is a sliding glass door going into the basement at the exact location where I would need to install a post.
So change the span and put in two posts, one on either side.
or -
change the layout to have three beams perpendiculat to the house to hang the joists on and then run the decking perpendicular too.
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Not sure if I completely understand, but sounds to me like you could attach just to the brick, with 'Redhead' sleeve anchors or wedge anchors about 4" long X 1/2" diameter. Sold at the Depot.
I've heard horror stories of decks anchored into brick or mortar joints and later crumbling with a little water and stress.
I'm sure it's been pulled off successfully, but it would make me nervous.
I was once instructed by an engineer to anchor a structural ridgebeam into a chimney by creating a "shelf" out of angle iron. Lagged the ridgebeam to the angle iron and the RedHeads to connect the iron to the mortar joints.
I had everyone (GC, Homeowner, and engineer) sign liability waivers. I still think about it from time to time and sweat a little.
I've never had a problem, but of course, your points are well taken. When attaching ledgers, it's always good to combine 'several' methods.