Support cables are an essential
part of any suspension bridge design as they bear the load of the decks
and traffic. Four spools, each containing 60 miles of steel wire and mounted
on axles, were set up on the cable anchorages at the tops of the towers.
Each wheel had two grooves and the wire was unreeled from two spools simultaneously,
placing four wires in the cable on each trip of the spinning wheel. Guide
wires were carefully laid into position, with the workers making constant
adjustments so that all the wires were laid to the same sag, thereby sharing
the load equally. When 472 wires were laid, they were bound with
metal bands forming one strand. Thirty-seven strands were compressed by
powerful compacting machines into one 28 ¾ - inch suspension cable.
Repairs to the cable wires are impossible once the cable has been completed.