# T-beams and Second moment of area

1. Aug 24, 2006

### Kramjit

Greetings all,

Given an upright T-beam (really a T when you look at it) with all dimensions given, what is the procedure for finding the second moment of are about the z axis (I sub z)?

Thank you so much.

2. Aug 24, 2006

### FredGarvin

Since this is boarderline a homeowork question, I'll try to help without helping too much.

Do you know how to find the area moment of inertia for a rectangle about an axis (hint: you have two of them in your problem)? Do you know what the parallel axis theorem is?

3. Aug 24, 2006

### Kramjit

Yes I do know how to find the second moment of area rectangles. But I am not sure of the parallel axis theorem.

4. Aug 24, 2006

### Pyrrhus

The Parallel axis theorem or Steiner's theorem is on any Vectorial Mechanics: Static book.

http://en.wikipedia.org/wiki/Parallel_Axis_Theorem" [Broken]

Last edited by a moderator: May 2, 2017
5. Aug 29, 2006

### Kramjit

Thank you

Thank you all that responded. I understand fully now.

Last edited by a moderator: May 2, 2017