In the following problem, unless otherwise noted, assume for steel that the modulus of elasticity is 30,000 ksi (207 × 103 MPa), the proportional limit is 48 ksi (331 MPa), and the yield stress is 50 ksi (345 MPa).
Calculate the Euler buckling load for a pin-connected steel pipe column. Use A = 8.4 in.2, r = 2.94 in., and the following lengths: (a) 50 ft, (b) 35 ft, (c) 20 ft, and (d) 15 ft. The proportional limit is 34,000 psi.
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