Practice Problem 6-4(a)

Practice Problem 6-4 (a)

Given: A steel beam (E = 30Msi) of length L = 30 in. has a square cross-section (2 in. by 2 in.). The beam is simply supported at the left end and has a guided support at the right end. A load of P = 200 lb is applied a the the right end.

Req'd:
What is the Moment of Inertia, I of the beam [in⁴]?

Solution: The moment of inertia for a square beam is given by:

I = t⁴/12 = (2 in)⁴/12 = 1.33 in⁴