The bridge was closed in the middle of last month after one of the supports on the £20 million structure snapped and a second was found to have a crack.
The first pieces of equipment to help install temporary supports before work begins to replace connectors on each of the existing hangers arrive next week.
River barges, access cranes and specialist equipment will be used for the work which is expected to take a couple of months to complete.
The temporary support system consists of specially fabricated saddle frames that will sit on top of the arc. Strand jacks will transfer the load of the bridge deck to allow the team to dismantle the existing hangers and to replace the top and bottom fork connectors.
Nuttall is working with Halcrow, steel contractor Watson Steel and component supplier MacAlloy.