On this quiz, “maximum” refers to the highest vertical point on the influence graph and “minimum” refers to the lowest vertical point on the graph.Draw the influence line for the vertical reaction at C. What is the line’s maximum value? Let L1 = 3 m and L2 = 13 m.

An influence line represents the variation of either the reaction, shear, moment, or deflection at _______ due to a moving load.

The floor system of a school classroom consists of a 3-inch-thick reinforced concrete slab resting on four steel beams (A = 16.2 in.2), which are supported by two steel girders (A = 30.4 in.2). The girders, in turn, are supported by four columns. Determine the live load acting on column B.

The floor system of a dance hall consists of a 4-inch-thick reinforced concrete slab resting on four steel beams (A = 16.4 in.2), which are supported by two steel girders (A = 31.5 in.2). The girders, in turn, are supported by four columns. Determine the live load acting on column B.

Draw the influence line for the moment at B. What is the line’s minimum value? Let L1 = 6 m and L2 = 4 m.

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.

Determine the beam deflection at point H. Assume that EI = 4.91 × 1010 kN-mm2 is constant.

The truss is pin supported at A and rocker supported at E. Assume all members are pin connected. Determine the magnitude of the force in member EF. Let F1 = 250 lb, F2 = 600 lb, and L = 5 ft.

Assuming that the live loads are transmitted to the bottom chords of the truss, draw the influence line for the force in member BC. What is the line’s minimum value? Let L = 16 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.