From an engineering viewpoint, the project is first-class and the iconic beauty of Gull Wing Bridge is evident. Although the MagnaDense concrete played a crucial role within the envelope of
the steel ‘wings’, it is concealed. The in-situ concrete used for the bridge piers and control room tower showed excellence in placement, with no visible honeycombing or blowholes. The heavyweight concrete used as the counterbalance was not visible as it was placed into the steel ‘wings’ of the bridge. However, the technicalities of designing this concrete to achieve +4000kg/m density were well documented.

The parapets for the road and railway sections of the bridge, and the bridge deck, were supplied as precast units and craned into position. The units were of excellent appearance. A patterned profiled finish with chamfered edges was used for the bridge piers. The control tower was cast in-situ with an exposed concrete finish and of a high standard, resulting in a very good finish with no obvious blemishes, as were the bridge piers and visible precast units.