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Need confirmation for supports to Ledge

1357 Views 8 Replies 5 Participants Last post by  Bob Mariani
I'm in the process of estimating a deck which will be basically set upon a sloped edge of ledge in the backyard of the homeowners. My thinking is to hammer drill some holes about 4" deep and epoxy the rebar pins in place. The pins will extend up about 8-10" and I'll tie some horizontal pieces to help keep the concrete support together.

Then I plan on forming some 8" square boxes that will conform to ledge slope and be about 8-12" high overall. The overall weight on these supports will be minimal per square ft. They'll be supporting a 4-6" x 20' platform and fro there some steps going down.

I'm heading to Cape Elizabeth this afetrnoon and take some pictures which I'll post tonight so as to give you guys a better perspective of the lay of the land. But in the meantime, is the approach above more or less the correct one when tieing into ledge? Just never had to do it before.

My only concern would be "shale ledge"

Dave...GBAR...Ron...Jaros...anyone. Your thoughts?
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I hit ledge at 40" deep for a post
I wasn't too worried about drilling & pinning

They hit ledge on my garage - maybe 2' down in one spot ?
They dug at it pretty good to break off anything loose on top
Then they drille dit & pinned it
Not extremely critical as it was buried 2' down

The only other spot was already 4' down

It depends upon the ledge
Exposed you really don't want to run the risk of it breaking off
So far I haven't had to work on any exposed ledge
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