The steelwork for the bridge was completely manufactured offsite at our facility. The sections were then delivered to the M25 build area where the concrete deck build was then undertaken. The 61m long Clearmount bridge was jacked up to its maximum height and placed on self-propelled modular transporters (SPMT). The SPMTs then carefully slid the bridge (500te total) onto the carriageway and moved it sideways 300 metres along the M25 and into place, with the road reopening to traffic over two hours ahead of schedule once it was safely installed.
This was the first time this method of transporting an already constructed bridge into place on the M25 has been used – meaning a full weekend closure of the M25 was not required.