Physics · Moment of Inertia
A symmetrical planar built-up section consists of two channel sections joined together at the tips of their flanges to form a closed rectangular area. The total width of each flange is 'B'. Each web is 'w' units deep inside, 'D' units deep at its outside (longer) face, and 'b' units thick. The moment of inertia of the composite section about its centroidal axis perpendicular to the webs is given by:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1BD312 - (B - 2b)w312✓
- 2BD312 + (B - b)w33
- 3BD312 - Bw33
- 4BD312 - (B - b)w312
Correct answer
BD312 - (B - 2b)w312
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