Healthy end to the long journey of a unique bridge Opened this summer, Humberside County Council's Stoneferry Bridge is a new and unique construction in Britain, spanning the River Hull in two sections and providing improved transport links for over 30,000 vehi cles per day. It comprises two identical steel bridges, each deck weighing 233 tonnes, with 132 tonne steel counterbal ance arms supported by two 36 tonne towers and 344 tonnes of steel concrete kentledge supplying the counterbalance. Computing systems control, monitor and record the systems for raising the bridge and the necessary traffic barriers and lights, all of which are interactive. Preparation and construction of the lifting bascule bridge and its structures took two and a half years to complete. One bridge was installed in September 1989, the other a year later. They were fabricated in Holland. Transhipping the bridge components across the North Sea and up river past seven bridges was one of the most challenging tasks for the engineers. After the long journey, the inevitable damage to the anti corrosion coating caused during transit and during erection was inspected on site by senior painting inspec tors fro m ITI Ant i Corrosion, wh o later supervised reme dial work and the application of the final two coats prior to the official opening. "It was vital that we had someone on site with a tho rough understanding of paints and expertise in coating inspection services," says Derek Edgerton, Resident Engineer at Humberside County Council. "ITI's response was quick, positive and reliable. They Humberside County Council's Stoneferry Bridge is a advised on the state of the coating of the bridges after new and unique construction in Britain spanning the erection at Stoneferry, recommended and inspected the River Hull in two sections. Senior painting inspectors remedial work necessary and supervised the application from ITI Anti Corrosion supervised remedial work and of the final two coats." the application of the final two coats prior to the By employing approved DTp inspectors living locally Bridge's official opening. — a polic y it maintains wherever possible — ITI was also able to establish the optimum time to paint the bridge bridges for Humberside County Council — the Ouse while keeping contract costs to a minimum. River Bridge, a % mile long M62 viaduct north of Hull; Kingsway Footbridge in Goole, which required exten sive coatings work; and Myton Swing Bridge in Hull, Inspection which was awarded a two year clean bill of health. During the past 12 months, ITI has provided inspec The main coating consists of chlorinated rubber — a tion and consultancy services on more than 140 bridges primer followed by micaceous ion oxide and finish. This throughout the UK in addition to a large number of was chosen for its water resistant properties, flexibility offshore, oil and gas-related projects. and long term corrosion resistance, but chlorinated rubber systems are traditionall y prone to transit damage. Details: ITI Anti Corrosion, Griffen Chambers, 13 High Inspection was carried out by ITI personnel using 80ft Street, Leighton Buzzard, Beds. LU7 7DN. Tel: 0525 high hydraulic platforms, cradles and scaffolding. All areas were inspected including inside and outside box beams, road deck beams, outside fascia and cantilever beams. The 12 week contract was performed in two stages, allowing one bridge to be kept open for traffic while the other was inspected and the remedial works carried out. Results of the inspection showed that despite several damaged areas, there were no problems with the original coating. Th e worst areas had to be strippe d back to bare metal and recoated before the two final top coats were applied. This year, ITI Ant i Corrosion has inspected three other ANTI-CORROSIO N October 1991
Anti-Corrosion Methods and Materials – Emerald Publishing
Published: Oct 1, 1991
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