A second box girder is lowered into place on the Auckland Harbour Bridge. Over the years the bridge has been added to in a variety of ways. These ‘Nippon clip-ons’ opened in 1969 were designed and prefabricated in Japan. The box-girder bridges, one on each side of the original structure, doubled the number of lanes on the bridge from four to eight. The girders are held by brackets attached to the original bridge piers. The clip-ons have since been upgraded for seismic resistance, wind loading and fatigue cracking.
Te whakamahi i tēnei tūemi
Auckalnd Libraries, Takapuna Library Photograph Archive
Reference: NABHE025
by Albert Chan
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