Question: A simply supported 20-ft-long beam carries a uniformly distributed load of intensity 800 lb/ft over its entire length. Find the lightest S-shape that can

A simply supported 20-ft-long beam carries a uniformly distributed load of intensity

A simply supported 20-ft-long beam carries a uniformly distributed load of intensity 800 lb/ft over its entire length. Find the lightest S-shape that can be used if the working stress in bending is 18 ksi. What is the actual stress in the beam selected?

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