Correct height for retaining wall force calculation?

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    Peter Mall

    I have seen it both ways, mostly to the top of the footing. You'll need an official ruling.

    In my experience, an ARE type question would likely not ask you to calculate the earth force. It may ask what kind of retaining wall/footing is best for a given height (5', 10', 25'). Or it may ask what the force diagram looks like (triangle, inverted, rectangle).

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    Plamena Milusheva

    Thanks for the reply Peter!

    I agree with you that probably focusing on the conceptual aspects of that type of problem is more effective. With that said, I have seen that problem as a quantitative one in almost every practice test I've taken, including the Black Spectacles YouTube mock exam videos. In reality this might be one of 100 questions so getting it right might not be crucial but at this point I am interested in the official NCARB ruling on this : )

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