|Client:||Sheffield City Council|
|Location:||Low Bradfield, Sheffield|
|Approved Installer:||Goldhawk Restorations|
Built around 1850, the Smithy Bridge is a stone construction, with a single span of 6.7m, crossing Agden Dyke which flows from the Agden Reservoir.
Following a structural assessment, the bridge was restricted to a gross vehicle weight of 10 tonnes and so did not meet the current required load bearing standards for highway bridges.
Helifix was contacted by Amey engineers to undertake a survey of the bridge and establish whether it could be strengthened sufficiently to increase its capacity to 40-44 tonnes in order to meet current standards. As it is in the Low Bradfield conservation area, which lies within the Peak District National Park, it was also important that any repairs preserved the bridge's aesthetics.
Goldhawk carried out a full structural assessment of the bridge using the ASSARC computer software program, enabling an optimised repair and strengthening scheme to be devised by the MARSYS computer package.
The weak Smithy Bridge was sympathetically and economically strengthened to accept full highway loadings and comply with EU regulation. The concealed repairs left the bridge virtually unchanged but with its structural integrity restored at a fraction of the cost of full bridge replacement.