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