Discussion
A seam carries a shear flow of \( 140 \) kN/m using rivets of \( 2.8 \) kN strength. The maximum pitch is
Answer: B
Each rivet must carry the flow over its own pitch, so \( p = 2800/140\,000 = 0.020 \) m. Pitches of around twenty to thirty millimetres are typical in a transport skin seam, and going much finer begins to weaken the sheet through the holes themselves.
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