Eleven sets of illustrations and the corresponding free-body diagrams of building-related beams are provided. These free-body diagrams constitute exercises that will be used here. Follow these instructions carefully to save time later:
(a) On engineering paper, neatly draw (with a straightedge) the free-body diagram for each of the 11 systems at an appropriate scale. Neatly draw one free-body diagram per sheet, using the top third of the individual sheet, leaving the bottom two-thirds of each sheet blank.
(b) Use additional sheets of engineering paper for the analysis. Solve for the unknown reactions, R1 and R2. Assume that each system is in static equilibrium, so the conditions of ∑M = 0 and ∑F = 0 may be used. Neglect the weight of the member under consideration.
The free-body diagram in Exercise 4.10.
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