This paper summarises the principal advantages of specifying steel for the bridge modifications required by increasing traffic demands. It primarily considers current state-of-the-art approaches, but also indicates likely future developments that could provide further benefits to specifiers. Reasons why steel is an especially suitable material for bridge modifications and replacements include: (1) quality; (2) economy; (3) availability of good design features and components; (4) speed of construction; (5) durability; (6) adaptability; and (7) the strength of technical support available from the structural steelwork community. The strength of these advantages is shown by the large and growing market share of steel in road bridge construction. In recent UK motorway widening contracts, over 90% of overbridges have had composite construction. Future developments, which should increase the benefits of using steel, include: (1) the rapidly growing interest in the use of integral construction, which no longer requires expansion joints and bearings; (2) higher strength, more weldable steels; (3) more automated fabrication; (4) computer integrated design and information flows; and (5) developments in initial painting and maintenance painting. For the covering abstract see IRRD 873097.


  • English

Media Info

  • Features: References;
  • Pagination: p. 12-24

Subject/Index Terms

Filing Info

  • Accession Number: 00712414
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Oct 24 1995 12:00AM