Let the hoist in Problem 10.12 be moved to one end of the beam. Each rod supporting the l-...

Let the hoist in Problem 10.12 be moved to one end of the beam. Each rod supporting the l-beam is a spring exerting an influence over length l. If the end of the beam is l/2 = 250 mm from the nearest tension rod, determine the maximum stress in the rods and beam.

Problem 10.12

A 60-kN capacity hoist may be moved along a steel I-beam (E = 200 GPa). The I-beam has a depth of 152 mm and moment of inertia Ix = 11.0 × 106 mm4. The beam is hung from a series of vertical steel rods (E = 200 GPa) of length 2.50 m, of diameter 18.0 mm, and spaced 500 mm center to center.

a. For capacity load at the center of the beam, located under one of the rods, determine the maximum stress in the beam and the rods.

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b. Does l satisfy Eq. 10.20?

 (10.20)