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← HistoryWhich mechanism limited the load capacity of pre-Columbian Inca suspension bridges using braided ichu grass cables?
A)Material tensile strength✓
B)Aerodynamic flutter
C)Thermal expansion coefficient
D)Cable elastic modulus
💡 Explanation
The ultimate load capacity was restricted by `material tensile strength` because excessive tension caused the ichu grass fibers to break, leading to catastrophic cable failure; therefore the bridge could only bear a lighter load, rather than being able to carry heavy cargo or be at risk of aerodynamic effects.
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