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Determine the magnitude of the approximate bending moment at D in girder DE. Let w1 = 20 kN/m, w2 = 36 kN/m, L1 = 8 m, L2 = 5 m, and L3 = 7 m.

How do you know when there is no point to doing another degree of moment distribution?   

Use Robot to determine the magnitude of the vertical reaction force at A. Let w = 17 kN/m, and L = 7 m. Delete the self-weight of the beam.

Determine the magnitude of the bending moment at B. Let w = 2.9 kip/ft, L1 = 21 ft, and L2 = 34 ft. Assume EI = constant.

Determine the beam slope at B. Let w = 1.2 kip/ft, L1 = 37 ft, and L2 = 21 ft. Assume EI = constant.

Determine the beam slope at B. Let w = 1.0 kip/ft, L1 = 30 ft, and L2 = 25 ft. Assume EI = constant.

Using the slope-deflection equations below, determine the beam slope at C. Let P1 = 12 kips, P2 = 13 kips, L1 = 17 ft, L2 = 9 ft, and L3 = 13 ft. Assume EI = constant.MAC = EIθC / 13 + 24.44MCA = EIθC / 6.5 + –46.17MCE = EIθC / 6.5 + 42.25MEC = EIθC / 13 + –42.25

The beam supports a single live load of 1,500 lb, a uniform live load of 600 lb/ft, a uniform dead load of 150 lb/ft. Determine the maximum positive moment that can be developed at point B. Assume the support at A is a pin and C is a roller. The influence lines for VB and MB are shown, along with the peak values of the influence lines.

Determine the magnitude of the bending moment at C. Let w = 2.1 kip/ft and L = 29 ft. Assume EI = constant.

Determine the fixed end moment FEMBA. Let w = 2.2 kip/ft and L = 29 ft. Assume EI = constant.