The simply supported beam supports a container whose weight W is much greater than the weight of the beam. The beam has a rectangular cross section with a height of 400 mm and a width of 150 mm. The...

The simply supported beam supports a container whose weight
W
is much greater than the weight of the beam. The beam has a rectangular cross section with a height of 400 mm and a width of 150 mm. The hole in the middle of the beam has a radius of 110 mm. The beam’s material will support a normal stress of 187.5 MPa in tension and compression. Determine the maximum allowable value of
W, assuming a factor of safety of 3 in the design. Compare your answer to that of Problem 12.16.

Problem 12.16

The simply supported beam supports a container whose weight
W
is much greater than the weight of the beam. The beam has a rectangular cross section with a height of 400 mm and a width of 150 mm. The hole in the middle of the beam has a radius of 50 mm. The beam’s material will support a normal stress of 187.5 MPa in tension and compression. Determine the maximum allowable value of
W, assuming a factor of safety of 3 in the design.