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Longer DLR trains prompt viaduct strengthening

TRANSPORT FOR London (TfL) is to carry out £110M of viaduct strengthening work along one of the Docklands Light Railway's (DLR) busiest routes.

Strengthening is needed to enable DLR to run longer trains.

The route between the City and Lewisham will have most of its viaducts strengthened to carry the additional weight of three car trains.

A DLR spokeswoman said this week that the type of strengthening work will vary because of the different viaduct structures along the route.

Some of the route is carried by Victorian wrought iron bridges and brick arch viaducts. But modern steel girder viaducts carry the lines through the Isle of Dogs, while concrete viaducts take trains on sections of line south of the Thames.

Most of the 6km of viaducts will need extra column support but the steel viaducts will require the most work, said the spokeswoman.

Extra steel plates will need to be bolted on to girders, bearings will have to be replaced and some column foundations will also need strengthening.

An application under the Transport and Works Act to proceed with the two-year project is due to be submitted shortly.

lDLR this week signed a contract with City Airport Rail Enterprises (CARE) to build the 4.4km DLR extension to London City Airport. CARE is a consortium of Amec and the Royal Bank of Scotland. It will design, build, finance and maintain the extension for a period of 30 years. Capital cost of the works is £140M.

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