Calculate the force P that may be applied to the punch press frame of Example 17-5 if the allowable stresses for cast iron are 6000 psi in tension and 10,000 psi in compression.
Example 17-5
A W12 × 72 structural steel wide-flange section is used as a simply supported beam with a span length of 12 ft. It is subjected to concentrated loads of 20,000 lb at each quarter point • an axial tensile load of 50,000 lb. Calculate the maximum combined tensile and compressive stresses. •
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