PROBLEM 9.50 To form a reinforced box section, two rolled W sections and two plates are welded together. Determine the moments of inertia and the radii of gyration of the combined section with respect to the centroidal axes shown. SOLUTION W-section 27.08 inA=418.3 inxI=482.8 inyI=plate22WAAA=+()()22 7.08 in7.93 in. 0.3 in.218.918 in=Now ( )( )platexxxWIII2426.495 in.218.3in7.08in2
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