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← HistoryWhich mechanical result limits span in Incan suspension bridges?
A)Rope tensile strength degradation✓
B)Tower shear stress overloading
C)Deck material compressive failure
D)Pier foundation settling subsidence
💡 Explanation
Rope bridges in the Inca empire faced distance limitations because surpassing the rope’s ultimate tensile strength caused catastrophic failure. The rope's inherent limits define safe span, therefore tensile strength determines that limit rather than deck compression as seen in arch bridges.
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