1 A beam has the following cross-section: where b = 55mm, h = 45mm, and t = 9mm.

Question

1 A beam has the following cross-section:
where b = 55mm, h = 45mm, and t = 9mm. Determine the
moment of inertia in inches^4:
I =_____inches^4:

2 A beam has the following cross-section:
where b = 4 inches, h = 9 inches, and t = 0:75 inches. Determine
the moment of inertia in inches^4:
I =____ inches^4:

3 A simply supported basswood beam
is 32 inches long and carries a load of 210 pounds. It has a
hollow box cross-section as shown
where b = 5 inches, h = 9 inches, and t = 1
inches. Basswood has the following material properties:
Modulus of Elasticity = 1.46 x 10^6 psi and Density =
28 pounds per cubic foot:Determine the moment of inertia; deflection; volume;andweight of the beam:
I =____ inches^4:
Deflection =____ inches.
Volume =_____ inches^3:
Weight =_____ lbs.

Explanation / Answer

for question 3's deflection, for a simply supported beam, try this equation D=(5/384)(210 L^3)/(EI) = .000282

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