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Curved Steel Towers above Salford Quays

508mm diameter curved tubes for the Lowry footbridge, Salford, Manchester

508mm diameter curved tubes for the Lowry footbridge, Salford, Manchester

Induction bending of large diameter steel tube for structural steelwork

Induction bending of large diameter steel tube for structural steelwork

Lifting towers on the North end of the Lowry footbridge, Salford, Manchester

Lifting towers on the North end of the Lowry footbridge, Salford, Manchester

Curved by The Angle Ring Co Ltd and fabricated by Fairport Steelwork, 8 pieces of 508mm diameter tubes sweep majestically down to the quayside at Salford.

Overlooking the Lowry Centre, each pair of tubes form part of the columns which raise and lower the 250 tonne bridge structure to a height of 23 metres above the Manchester Ship Canal.

Salford Quays originated as the Port of Manchester although merchant shipping ceased to use the port in the early 1970's. after several iconic buildings were constructed in the area the decision to place a new bridge was made and fabrication for this iconic pedestrian bridge began in 1997 with completion in 1999.

Although it is now not essential for tall ships to pass along the canal care was taken to ensure the bridge met the statutory navigation requirements of the Manchester Ship Canal Company and the deck can rise from 5 metres above water level to 22.9 metres.

Despite their lattice design each tower weighs in at nearly 40 tonnes and stands 31 metres high. Within each tower are the motors, sheaves and counterbalance required to lift the 250 tonnes deck, although the counterbalance system allows just 10 tonnes of effort on each of the winches to lift the structure.

The 'front' legs of each tower consist of 660mm diameter tubes, with the 'rear' legs being 508mm diameter tubes which were induction bent by Angle Ring at its comprehensive production facility in Tipton.

The Induction bending process involves heating the steel section to in excess of 750°C and carefully controlling the bending process to ensure the section profile is maintained, which is critical to retaining the strength of the steel sections.
The tubes, although large are well fall in the middle of Angle Rings capacity of bending, which includes tubes from 6mm in diameter up to 914mm diameter.

The bending capacity of Angle Ring also covers sections (beams, channels, columns, angles & flat bars) as well as press braking, plate rolling, tube manipulation (also known as mandrel bending or 'rotary draw' bending) and heavy plate forming.

For more information about Angle Ring visit www.anglering.com

For more information about the Lowry footbridge, Corus (now Tata Steel - www.tatasteelconstruction.com) produce a PDF of the project details
search Google for "Lowry Footbridge" "Bridged in Steel"
 

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