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A tapered box has spar caps inclined at \( 4 \) degrees to the axis, each carrying \( 400 \) kN. The transverse component from both caps is nearest to

  • A.112 kN
  • B.14 kN
  • C.56 kN
  • D.28 kN

Answer: C

Each cap contributes \( 400 \sin 4^\circ = 400 \times 0.0698 = 27.9 \) kN, and two caps give about 56 kN. That much of the applied shear is carried by the caps rather than the web, which a prismatic analysis would miss.

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