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Problem 5-7 A W30x90 section (A992 steel) is used as a beam in the configuration shown at the ri ...
Problem 5-7 A W30x90 section (A992 steel) is used as a beam in the configuration shown at the right. Determine, using LRFD, whether the beam is overloaded if: (a) lateral bracing is provided for the entire span (b) lateral bracing is provided only at the ends and at the concentrated loads, and Cb?=1.0 (c) Same as (b), except calculate Cb? as allowed by AISC. ANSWERS: (a) ?Mn?=1060 kip-ft > Mu?=976 kip-ft, OK; (b) ?Mn?=918 kip-ft, NG; (c) ?Mn?=959 kip-ft, NG
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