The Bann River Bridge is a single-track railway bridge, composed of 11 steel girder sections resting on reinforced concrete piers. Constructed in the 1920’s, the bridge has served for nearly 100 years carrying the Coleraine to Derry/ Londonderry line over the River Bann. Innovatively, the bridge features a large bascule type lifting span to allow for the passage of ships below en route to Coleraine Port.
Project Summary
SDG tendered for the design and supply of the replacement
bridge bearings, with Main Contractor and long standing partner,
FP McCann. To date, this has been one of our most technically
demanding projects to work on, due to the shear level of bespoke
design involved in the production of the bearings.
Our Solution
SDG worked closely with Manufacturer GUMBA based in
Germany to design and supply a total of 36 Guided and Free Pot
Bearings in accordance with EN 1337-5.
Pot Bearings are a proven bearing type, their industry standing
has been achieved through the combination of a non-reinforced
elastomeric bearing (Natural Rubber) confined within a closed
steel housing.
With a Pot Bearing, it is possible to transmit high
vertical loads on a very small area, in the case of the bearings
supplied to the River Bann Project, over 1600kN.
The Results
Key Benefits Include:
• Pot Bearings have negligible vertical deflection under load
• Pot Bearings have uniform vertical deflection under load
• Pot Bearings have high vertical and horizontal load capacity
• Pot Bearings cause relatively low stress on the bearing
seats
For more information on GUMBA Bridge Bearings and projects we have worked on across UK and Ireland, please contact our technical team on +44 (28) 3752 8999 or hello@weareSDG.com
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