Discussion
Two cells of a box carry shear flows of \( 140 \) and \( 90 \) kN/m in the same circulating sense. The net flow in the web they share is
Answer: C
The two circulating flows oppose one another in the common wall, so the net value is \( 140 - 90 = 50 \) kN/m. Interior webs are often the most lightly loaded part of a multi-cell box under pure torsion for exactly this reason.
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