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By Tilly, G. P.; Wallsgrove, Jon; Frost, Alan

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Sample text

For example, bridges on abandoned railway lines, bridges on tracks to demolished factories, and bridges across dried­up canals and streams.  They may for example have decorative features of unusual or special merit, be constructed on much older foundations, be located in an attractive landscape, or be of an age which merits attention in relation to other buildings nearby.  For example, it may be the oldest, or the only, surviving example of a particular type of design, the first example of the use of a new material or technique (Billingham Branch Bridge, mentioned earlier, is the first significant welded bridge but was close to demolition before it was recognised), have been constructed with iron from a local foundry or brick from a local brick works, or have been designed by a notable local engineer.

They were used to trigger flashing signs warning drivers that they are OVERWEIGHT and should TURN BACK.  In any case, the style of the historic plate, its colour and the size of lettering should be indicative of its content.  This income was intended to pay for the upkeep of the bridge.  They have had chequered histories and nowadays are put to a variety of uses.  The chapel is now used as a museum.  The bridge is in the care of Wiltshire County Council.  After the dissolution, it became an almshouse, then a gaol in 1826, then a tobacconist shop, and in 1924 it was restored as a chapel.

One of the last mass concrete bridges was Pilgrims Way Bridge across the Guildford bypass in Surrey, built in 1933, but no longer in use. 12. 13. 14, has weathered rather well and has an attractive appearance after some 70 years’ service life.  It was constructed of lightweight precast units post­tensioned together longitudinally and transversely. 16.  Due to the need for light weight, superstructures are usually constructed in steel for highways or wood for pedestrians. 17.  Cable­stayed bridges have become popular in recent years but there are only a few road bridges that are more than 40 years old.

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