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Re: Vessel or Stack Foundation - Shallow Bedrock

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It depends upon how high the mast is and what it weights. You will probably have to go to bed rock anyway and you can easily figures what a "spread" block footing will have to be. If you have a real estate problem, then rock anchors might be the answer, but they do cost more money and extra concrete weight might be cheaper.

Neil Moore, PE, SE

On 8/28/2013 12:01 PM, Drew Morris wrote:
Can you add rock anchors into the bedrock to tie the concrete foundation down?

On 8/28/2013 10:50 AM, Polhemus, William wrote:
Has anyone here got experience with a foundation for a tall vessel or stack e.g (standalone, not guyed) in a condition where there is fairly shallow bedrock?

I'm looking at the possibility of such a thing. Typically I use deep pier or pile foundation, but In this case there is assumed to be bedrock at 8 to 10 feet depth below ground.

I assume I could then use a "chunk" foundation bearing directly on the rock in such a case, recognizing I might need a spread there to deal with the overturning.

In that case what do I need the geotechnical to tell me?

William L. Polhemus, Jr. P.E.


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