## Moment of Inertia / Section Modulus for a cruciform (rectangular cross)

Hi,

I'm trying to find a formula to help me find either the Moment of Inertia for a cruciform (rectangular cross) or better yet, its Section Modulus (S).

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 Jay, Wouldn't this require parallel axis theorem? Or without getting into that could you just say [(b*h^2)/6] + [(h*b^2)/6] <-- (wait, isn't this the same as perpendicular axis theorem?) where b is the length from end to end of the cruciform, and h is the width of the segment? (for section modulus)

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