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The beam supports a single live load of 2,800 lb. 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.

Which conjugate beam corresponds to real beam 5?

Draw the influence line for the shear at B. What is the line’s maximum value? Let L1 = 3 m and L2 = 11 m.

Determine the vertical displacement of joint B. Assume A = 2 in.2 and E = 29,000 ksi for each member. Let P = 610 lb and L = 8 ft.

Draw the influence line for the reaction at C. What is the line’s maximum value? Let L1 = 8 m and L2 = 4 m.

Assuming that the live loads are transmitted to the bottom chords of the truss, draw the influence line for the force in member BF. What is the line’s maximum value? Let L = 20 ft.

The beam is fixed at wall B. Determine the vertical reaction force By at point B. Let L = 30 ft, M = 950 lb·ft, P = 725 lb and w0 = 250 lb/ft.

Assuming that the live loads are transmitted to the bottom chords of the truss, draw the influence line for the force in member DH. What is the line’s minimum value? Let L = 20 ft.

The absolute maximum bending moment due to a single concentrated load occurs under the load.

The beam is fixed at wall B. Determine the reaction moment MB at point B. Let L = 30 ft, M = 950 lb·ft, P = 850 lb and w0 = 225 lb/ft.