Old lady fit again
How long can the building work needed to modernize the entire Tower Bridge control system take? "No longer than 39 days!", Bosch Rexroth Limited, the overhaul project's general contractor in Britain, was told.
60 staff members working in two shifts around the clock successfully ensured that the old bridge's joints were set right in record time.
The modernization focused on checking, maintenance and replacement of electro-hydraulic components such as hydraulic valves and pumps, hydraulic cylinders and aggregates.
Modernization was necessary because the vibrations from ever-increasing traffic loads had already led to wear in the bridge mechanics.
The project was completed precisely on schedule on February 15, 2002, when the bascule bridge resumed operation. It is opened up to 1,000 times a year. The normal opening operation takes about one minute.