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On the sign:
JOINER STREET BRIDGE ERECTED 1849
James Warren (1802-1870) and W T Monzani patented their iron girder in 1848. The triangular frames are cast iron, with a wrought iron bottom chord, and the Grade II listed trusses above this area are some of the earliest surviving examples. The eastern abutment arches are believed to be remnants of the 1839 London and Croydon Railway terminus station.
The sign at the London Bridge train and tube station indicates the triangular girders that formed the support beams of the old station. During the rebuilding of the station, which was completed in 2018, a special effort was made to preserve the old beams. Joiner Street is one of the three streets that ran under the station platforms, and the only one that remains operational, albeit only for pedestrians on their way to the station.