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To combat communism, one of John Kennedy’s first acts was to

Determine the value of plastic section modulus, Z, about the horizontal z axis for the section. Let bf = 15 in., d = 24 in., tw = 0.375 in., and tf = 0.625 in.

The beam is braced at A, B, and C. Determine the lateral-torsional-buckling modification factor, Cb, for the unbraced length AB. Let P = 105 kip, L1 = 13 ft, and L2 = 6 ft.

A W16x36 made of A913 Grade 70 steel is subjected to a maximum bending moment of 180 kip-ft about its x-axis. Determine the maximum magnitude of bending stress in the beam.

The beam is braced at A, B, and C. Determine the lateral-torsional-buckling modification factor, Cb, for the unbraced length AB. Let P = 120 kip, L1 = 14 ft, and L2 = 8 ft.

An unsymmetrical flexural member consists of a 3” × 18” top flange, a 3” × 13” bottom flange, and a 1” × 55” web. Determine the distance from the top of the shape to the horizontal plastic neutral axis.

The beam is braced at A, B, and C. Determine the lateral-torsional-buckling modification factor, Cb, for the unbraced length AB. Let P = 80 kip, L1 = 13 ft, and L2 = 6 ft.

Use the Steel Construction Manual to determine the plastic moment capacity, Mp, of a W18x106 beam made of A36 steel.

Use the Steel Construction Manual to determine the plastic moment capacity, Mp, of a W24x131 beam made of A572 Grade 42 steel.

The beam is braced at A, B, and C. Determine the lateral-torsional-buckling modification factor, Cb, for the unbraced length AB. Let P = 85 kip, L1 = 12 ft, and L2 = 8 ft.