camber difference

The error

A decision to use concrete ballast (kentledge) to realign girders that didn’t meet, was a fatal one.
A view from the top

When the two half girders on the west side, span 10-11, were brought into close proximity up on the structure, it was established beyond all doubt that a camber difference of about 4.5 inches (114mm) existed. It was proposed by JHC that time might be saved if the vertical difference of level could be taken out by using kentledge to push down the north half span relative to its south counterpart.

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