If anyone's interested, I've written a program that computes the neutral axis (Ybar) and x-section moment of inertia (Ix)for any build up of n rectangular components (ie. uneven I-beam, sandwich construction).

Inputs are prompted:

N (no. of components)

Prompted for each component:

B (base dimension)

H (height dim)

Outputs to the x and y register:

Y: neutral axis of composite

X: x-sect moment of inertia of composite

It uses two labels (could be done with one, but as it is it works)

I'm sure there's others out there. Happy to share, send an email to erikuma815@yahoo.com

Eric