In the following problem, the given loads are superimposed service loads; that is, they do not include the weights of the beams (unless noted otherwise). For structural steel beams (unless otherwise noted), assume a yield stress of 50 ksi (345 MPa). For timber beams, all beams are solid, rectangular shapes and Appendices E and F are applicable. Consider only moment and shear (unless otherwise noted).
Design simply supported timber beams (S4S) for the following uniformly distributed line loads and spans:
(a) eastern white pine, 5.0 kN/m, 7-m span length
(b) southern pine, 6.3 kN/m, 8-m span length
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