Hi there
New to the forum. I have two sections both region-ed. What is the correct way to find the combined inertia. The sections kind of "fit" into each other. So far I have used two different methods and I don't know which is correct.
1. Centre each section individually, find the section properties of each sections and then add them together.
2. Combine the section, centre them together, and then find the inertia of the combined sections.
So which one is correct? The first one gives a much smaller I value then the second ones.