Hi guys,(adsbygoogle = window.adsbygoogle || []).push({});

I would like to derive the Ixy equation from simple integration and I can't seem to get the right answer (third equation down the picture). I seem to be able to derive Ixx and Iyy easily but product moment of area requires first moment of area to be calculated and I just don't know how to do that on an inclined section.

Any help would be apprecited on this issue.

Thank you.

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Product moment of inertia of an inclined section of a beam

**Physics Forums | Science Articles, Homework Help, Discussion**