Unformatted text preview: max 5 qL 2 8 Ê s 5 M max S Ê q 5 8 S s L 2 t h 1 b h A B L = 14 m q 450 mm 450 mm 1800 mm 15 mm 30 mm 30 mm Problem 5.109 A simple beam with an overhang supports a uniform load of intensity q 5 1200 lb/ft and a concentrated load P 5 3000 lb (see figure). The uniform load includes an allowance for the weight of the beam. The allowable stresses in bending and shear are 18 ksi and 11 ksi, respectively. Select from Table E2, Appendix E, the lightest Ibeam ( S shape) that will support the given loads. Hint: Select a beam based upon the bending stress and then calculate the maximum shear stress. If the beam is overstressed in shear, select a heavier beam and repeat. C P = 3000 lb q = 1200 lb/ft 12 ft 4 ft 8 ft APDF Split DEMO : Purchase from www.APDF.com to remove the watermark...
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 Spring '08
 Armanios
 Shear Stress, Truss, Shear strength

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