1. Calculate the bending moment required to produce a radius of curvature of 1250 ft for a 1 1 2 -in. square steel bar.
2. A 6-ft-long cantilever beam is subjected to a concentrated load of 5 kips acting at its free end. Calculate the maximum deflection at the free end if the beam is
(a) a solid rectangular Douglas fir (S4S), 8- in.-by-12-in. beam;
(b) a W10×22 structural steel wide-flange shape;
(c) an 8-in. nominal diameter extrastrong steel pipe. Use the formula method.