Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Backing columns

JL Franklin (Letters 9/16 April) highlights an interesting feature seen in many modern cable stayed bridges where columns in the back spans are used to 'stiffen' up the structure, reducing deflections in the pylons and main span while also providing stability during the deck construction.

Our company carried out the independent structural check of the Vasco da Gama bridge and I have never doubted that the completed structure would provide a stunning example of modern bridge building which is not distracted by the columns in the back span. On the contrary, the columns break up the back span and give sympathy with the adjacent spans in the approach viaducts while emphasising the main span, enhancing the overall appearance.

NR Hewson (F), Hyder Consulting,

The Surrey Research Park,

Guildford, GU2 5AR.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.