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Severn Bridge

Built: 1961 - 1966
Status: in use
Location: Between Aust, South Gloucestershire, Gloucestershire, South West England, England, United Kingdom and Beachley, South Gloucestershire, Gloucestershire, South West England, England, United Kingdom
Crosses: River Severn
Carries: M 48 Motorway
Bridge crossing the Severn Estuary<br>Below the 1966 suspension bridge, in the middle, the 1996 cable-stayed bridge. <br>Photo taken on a flight Paris-Toronto.
Click on the image to enlarge it.
Structural Type:
Suspension bridge with diagonal hangers
Function / usage:
Motorway bridge / freeway bridge

Persons involved with this structure
Legend: Phase of works
RoleNamePart of structure 
Designer Gilbert Roberts

Firms, offices, etc. involved with this structure
Legend: Phase of works
RoleNamePart of structure 
Design Freeman Fox & Partners
  Mott, Hay and Anderson
Construction Cleveland Bridge & Engineering Co. Ltd.
  Dorman, Long and Co. Ltd.
  John Howard and Co. Ltd.
Co-contractor Sir William Arrol & Co.
Cable steel supplier Bridon International
Renovation
Structural engineering Flint & Neill Partnership
Strengthening (1987-1988)
Cable steel supplier Bridon International

Technical information
DescriptionValue
Construction materials used
cables  steel wire
deck  steel
pylons  steel
Dimensions
  main span 988.00 m
  length of side spans 305 m
  clearance 47 m
main bridge   span lengths 304.80 m - 988.00 m - 304.80 m
pylons   pylon height 121.80 m

Notes & Comments
The cables are made of zinc-coated wire.

Relevant Web Sites
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External LinkA Span for All Seasons: Severn Crossings I & II English
External LinkBridges across Afon Hafren or River Severn: Modern Severn Bridges - Severn Suspension Bridge English
External LinkSevern River Crossing PLC: History overview English

Relevant Literature
* Severn bridge follows Forth with cable woes, in "Bridge Update", March 2007, n. 66 .
* Severn cables under constant scrutiny, in "Bridge Update", September 2008, n. 78 .
* Wrapped up well, in "Bridge Design & Engineering", 2nd Quarter 2008, n. 51 v. 14 .
* Beckett, Derrick   Great Buildings of the World: Bridges, Paul Hamlyn, New York (USA) , 1969; pp. 180-188.
* Brown, David J.   Bridges, Macmillan Publishing Company, New York (USA) , ISBN 002517455X, 1993; pp. 116-117.
* Fisher, Jeffrey   Severn Bridge – Recent assessment of main suspension cables, presented at 35th Annual Symposium of IABSE / 52nd Annual Symposium of IASS / 6th International Conference on Space Structures, London, September 2011.
* Flint, Anthony   The strengthening and refurbishment of the Severn suspension bridge (England), presented at Ponts suspendus et à haubans. Cable-stayed and suspension bridges, Deauville, 12.-15.10.1994.
* Lancaster, John   Engineering Catastrophes (2nd edition), Woodhead Publishing Ltd., England (United Kingdom) , ISBN 1855733420; pp. 191-196.
* Picon, Antoine   L'art de l'ingénieur, Éditions du Centre Georges Pompidou, Paris (France) , ISBN 2858509115, 1997; pp. 452-453.
* Prade, Marcel   Les grands ponts du monde: Ponts remarquables d'Europe, Brissaud, Poitiers (France) , ISBN 2902170653, 1990; pp. 278.
* Schröter, H.-J.   Der augenblickliche Stand der Bauarbeiten an der Severn-Bridge, in "Stahlbau", April 1965, n. 4 v. 34 .
* Sriskandan, K.   Maintenance of the structures of the existing Severn Crossing, presented at Extending the Lifespan of Structures, IABSE Symposium, San Francisco, August 1995.
* Teyssandier, Jean-Paul   Grande-Bretagne. Ancien pont sur la Severn. Renforcement, in "Ouvrages d'art", July 1995, n. 21 .
* Williams, D. T.   Le nouveau pont suspendu sur la Severn (Grande-Bretagne), in "Acier = Stahl = Steel", April 1967 v. 32 .
* Wittfoht, Hans   Buiding bridges, Beton-Verlag, Düsseldorf (Germany) , ISBN 3764001763, 1984.
* Young, Jeff   Assessment of the Suspension Cables of the Severn Bridge, presented at 17th IABSE Congress, Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, September 17-19, 2008.

 
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