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420_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

# 420_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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Problem 5.6-5 A simple beam AB is loaded as shown in the figure. Calculate the required section modulus S if s allow ± 17,000 psi, L ± 28 ft, P ± 2200 lb, and q ± 425 lb/ft. Then select a suitable I-beam ( S shape) from Table E-2(a), Appendix E, and recalculate S taking into account the weight of the beam. Select a new beam size if necessary. Problem 5.6-4 A simple beam of length carries a uniform load of intensity and a concentrated load (see figure). Assuming , calculate the required section modulus . Then select an 200 mm wide-flange beam (W shape) from Table E-1(b) Appendix E, and recalculate taking into account the weight of beam. Select a new 200 mm beam if necessary. S S s allow ± 110 MPa 22.5 kN q ± 5.8 kN m L ± 5 m 414 CHAPTER 5 Stresses in Beams (Basic Topics) Solution 5.6-4 N UMERICAL DATA L OCATE POINT OF ZERO SHEAR greater than dist. a to load P so zero shear is at load point F IND REQUIRED SECTION MODULUS select W 200 * 41.7 ; ( S act ± 398 * 10
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