1825:
“When the blocks were made secure to the chain, (comprizing twenty-five   tons weight of iron*) two capstans, and also two preventive capstans, commenced working, each capstan being propelled by thirty-two men.

To preserve an equal force and tension in the rotatory evolutions of the two principal capstans, two fifers played several enlivening tunes, to keep the workmen regular in their steps, for which purpose they had been previously trained.”
[Particulars of the Grand Suspension Bridge, 3rd ed., Pring, 1826]
Menai Suspension Bridge

*39.5 ton load @ designed curvature.