- #1

jdawg

- 367

- 2

## Homework Statement

Determine the moment of inertia of the cross sectional area of the T beam with respect to the x' axis passing through the centroid of the cross section.(I'm attaching a diagram)

## Homework Equations

## The Attempt at a Solution

Hi! I'm having a little trouble with this problem. I've already calculated the centroid with respect to y to be 60 mm.

I

_{x'}=I

_{x}+A(d

_{y})

^{2}

I

_{x'}=(1/12)(150)(30

^{3})+(150)(30)[(150)(30)(60-15)]

What I don't understand is how they are calculating d

_{y}! Could someone please explain to me what they are doing?