The three beams shown have approximately the same cross-sectional area. Beam 1 is a W 14 x
Question:
(a) Which design has the largest moment capacity?
(b) Which has the largest shear capacity?
(c) Which is the most economical in bending?
(d) Which is the most economical in shear?
Assume allowable stress values are: Ïa = 18 ksi and Ïa = 11 ksi. The most economical beam is that having the largest capacity to-weight ratio. Neglect fabrication costs in answering (c) and (d) above.
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