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Cable corrosion: American bridges must suffer it too

A strength reduction of 10% due to corrosion of the Forth Road Bridge cables (NCE 26 June) may well be less than was expected by, and therefore relatively good news for, some.

But let's not forget that the structure is only 44-years old, and that there older cable suspension structures around the world, especially in the United States.

I wonder how they are faring? I think we should be told.

BOB PRITCHARD, 7 Lovedale Crescent, Balerno, Edinburgh EH14 7DP

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