Starting a new addition and I had a question about anchoring the j bolts for the sill. It’s a slab foundation and the specs called for L block or header block on top of the wall to accept the concrete pad. Would it be better to embed 10″ J bolts between the blocks or expoxy in threaded rod into the block itself. Just wondering if anyone had more experience with these L blocks.
Thanks, Chuck
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You've got me confused.
Slab foundation does not have block.
Maybe you could detail what you are doing rom the ground up first to make it cclear. So far it sounds like block under and over a slab?
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It's not a monolithic slab. Because it's a portion of the house and not the garage we have to go down 42" and pour a trench footer and then lay 3 courses of block. The top block is a L block or header block. We then do a vapor barrier and crushed stone base and the 4" concrete pad is poured flush with the top of the header block. So I was wondering if it would be strong enough to just put the L bolts mortared between the top L blocks or epoxy some threaded rod right into the block itself. I was hoping to use 16" bolts and imbed them into the 2nd course of standard 8" block but if I want to keep the same running pattern then the seems will fall on the solid portion of that block. So I'm back to epoxy or shorter bolts. Also the house is a slab built the same way and is the reason we are doing a slab as well.
Hope to hear your opinion Pifffin, Thanks Chuck
I just place the anchor bolts after the pour is screeded off and first float. Are you trying to have them all set before pouring? That makes extra work for the finishers. If you wil havve an extra course of block above the slab, then just use longer anchor bolts but still set them when pouring.
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