1. A beam has the following cross-section: where b = 4 inches, h = 9 inches, and

Question

1.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:

2. 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 have everthing except the deflection.
I =__218__ inches^4:
Deflection =____ inches.???
Volume =___768__ inches^3:
Weight =___12.4__ lbs.

3.A simply supported basswood beam is 98 inches long and carries a load of 550 pounds. It has an I cross-section. where b=3 inches,h=7inches, and t=0.5 inches

Explanation / Answer

For the first: bh^3/12-(b-2t)*(h-2t)^3/12 b = 4 inches, h = 9 inches, and t = 0.75 inches 4*9^3/12-(4-.75*2)*(9-2*.75)^3/12=155.109375 inches^4

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