Author: J. Chapman (School of Architecture & Planning, The University of Auckland, New Zealand)
2 August 2012
First published: 2 August 2012
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J. Chapman (School of Architecture & Planning, The University of Auckland, New Zealand)
The Awa Shirasagi Ohashi Bridge, which includes novel structural systems, was recently constructed in Tokushima, Japan (Figure 1). There were a number of severe design constraints for the project. The bridge is located in a very environmentally sensitive area. The site is also in a seismic region and is frequently struck by typhoons. Furthermore, the bridge was to be founded on soft alluvium, and to be constructed to a tight budget. These exceptionally challenging constraints led engineers to adopt a novel combination of structural forms, including the ‘cable egret’ cable truss system, an improved form of the permanent tubular steel pile cofferdam foundation and a steel- concrete composite sandwich slab deck.
All articles published in the August 2012 issue.
This Technical Guidance Note explains the way in which reinforced concrete drawings should be read. In many cases reinforced concrete drawings are more diagrammatic than their general arrangement counterparts and carry with them their own unique set of rules and nomenclature. Note that the guidance provided here is based on European codes of practice; for all other regions the reader is directed to local guidelines on reinforced concrete detailing methods. This technical guidance note does not cover the rules governing the detailing reinforced concrete. That is a far more complex subject which is dealt with in The Institution of Structural Engineers’ publication Standard Method of Detailing Structural Concrete (3rd edition).