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Need confirmation for supports to Ledge

1355 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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Thanks guys. Well it is Maine Coast ledge. I will point out to the customer what's involved in terms of stability and the importance thereof. But I do know that the live load will be limited 90% of the time since this will be simply a few platforms and a run of maybe 8 steps at one point.

I'd say the slope is probably [from top to bottom] about 8-9' in a 15' run. Normally you would think unless they decide to have 30 people go up this stairway at once...your good with what I described above for an approach to do this. But the thing is, that's how this has to be planned (overkill). It only takes that one unplanned, unexpected situation for things to go badly very quickly.

12' round pier won't be neccessary though (I guess you need to see it Ron), but, deeper holes I agree with. I'll probably get a "rock guy" {tech term?????} and have him assess the situation.

Couldn't get pic's cause it's raining cat's-n-dog's right now. But I'll revisit this tread later.

Thanks again.
Thanks. Meeting with local inspector Friday morning. Should know then.
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