Slipping Up

The legs of the two main towers were produced using the slip form technique, by which both legs of the tower were constructed simultaneously, with the operating platform inching upwards as the tower grew in height.

The slip forming of Hessle Tower took 19 weeks, with an average rate of climb of 76.4mm per hour.  The towers are 155.5m high, and in this archive image of 1976, you can see that good progress was being made on the Hessle Tower.

On the south bank, the Barton tower was delayed due to technical difficulties with securing foundations in the river itself, but once work began it took just 10 weeks to construct.