The Structural Engineer > Archive > Volume 71 (1993) > Issues > Issue 23/24 > The Use of External Tendons for the Bangkok Second Stage Expressway
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The Use of External Tendons for the Bangkok Second Stage Expressway

External, unbonded tendons have attracted much attention recently, while internal, bonded tendons have come into criticism and are going out of favour. It is important in future projects where external tendons are going to be used that suitable details and techniques are developed to give the desired strength and durability. A lot can be learnt from the way external tendons are used in other parts of the world, where the feature is more common. This paper describes the design of the Bangkok Second Stage Expressway which is currently under construction using the latest techniques developed in the United States and France and is one of the largest ever uses of external tendons for a viaduct project. N.R. Hewson