Engineers were last month carrying out emergency repairs on bolted connections to the Forth Road Bridge's suspension cable hangers. The work was scheduled at short notice after an inspection identified new damage to nuts on the bolts that hold the vertical hanger ropes to the bridge's main suspension cables. The hanger ropes loop around metal castings, which are bolted to the cables by 35mm diameter steel bolts, each with a nut at either end. There are 944 of these bolts.
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