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Question

3 in

12 in

31

12 in

3 in

Question 3 (3 pts.)

32 in

Question 1 (5 pts.)

Draw the shear and bending moment

diagrams for the beam carrying the 2500-

lb sign as shown at left.

Question 2 (5 pts.)

If the beam in Question 1 is instead made up of three 3" X 12"

wooden beams nailed together as seen at left, determine the

maximum spacing of the nails if they fail due to a shear force

of 400 pounds.

The beam in Question 1 is made of solid steel, and

has the cross section seen at right. Determine the

maximum normal and shear stresses in the beam.

H

3 in

3 in

12 in

3 in

Fig: 1