## Solution to Problem 551 | Unsymmetrical Beams

Problem 551

Find the maximum tensile and compressive flexure stresses for the cantilever beam shown in Fig. P-551.

Problem 551

Find the maximum tensile and compressive flexure stresses for the cantilever beam shown in Fig. P-551.

**Problem 532**

A beam simply supported at the ends of a 25-ft span carries a uniformly distributed load of 1000 lb/ft over its entire length. Select the lightest S section that can be used if the allowable stress is 20 ksi. What is the actual maximum stress in the beam selected?

Assume that the beam in the problem is properly braced against lateral deflection. Be sure to include the weight of the beam itself.

**Problem 531**

A 15-ft beam simply supported at the ends carries a concentrated load of 9000 lb at midspan. Select the lightest S section that can be employed using an allowable stress of 18 ksi. What is the actual maximum stress in the beam selected?

**Problem 524**

A beam with an S380 × 74 section carries a total uniformly distributed load of 3W and a concentrated load W, as shown in Fig. P-524. Determine W if the flexural stress is limited to 120 MPa.

**Problem 520**

A beam with an S310 × 74 section (see Appendix B of textbook) is used as a simply supported beam 6 m long. Find the maximum uniformly distributed load that can be applied over the entire length of the beam, in addition to the weight of the beam, if the flexural stress is not to exceed 120 MPa.

**Problem 519**

A 30-ft beam, simply supported at 6 ft from either end carries a uniformly distributed load of intensity w_{o} over its entire length. The beam is made by welding two S18 × 70 (see appendix B of text book) sections along their flanges to form the section shown in Fig. P-519. Calculate the maximum value of w_{o} if the flexural stress is limited to 20 ksi. Be sure to include the weight of the beam.