October 2011: The work entails replacing two of the longest hangers, which are 12 metres and 14 metres long and together weigh around a third of a tonne. They were hoisted into position using a cherry-picker. Straps with strain gauges held the strain while each rod was removed. A further eight hangers are being replaced without the need to disrupt traffic.
Note the bridge spanner being put to good use, and the strain gauges at the base of each of the two straps used to take th