Indeed the link is dead and we are sorry for that. I have reported this problem to the responsible people and they will take care of it.
Regarding the information provided in the link it is related to older version of Telerik UI controls and IE6 and IE7 browsers. Therefore I am not sure that it would be useful for you. If you specify what are the problems you encounter when setting columns widths we would be able to advice you how to resolve them.
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