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).
Steel columns are to have end conditions as shown in Figure 18-4a through d. Calculate, for each case, the minimum slenderness ratio for the application of Euler’s formula. The proportional limit of the material is 40 ksi.
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