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I was asked by a designer whether MGS w-beam can be curved and have been looking for information on the MwRSF website but have not been successful in finding any past research projects or questions pertaining to this.  Is there any guidance or information available for curving MGS w-beam or is it even acceptable?

In response to your question, there is limited guidance on curved MGS. The most current guidance was provided in a recent NCHRP study on curved longitudinal barrier limits attached.

https://www.trb.org/Main/Blurbs/178297.aspx

Let me know if I can be of additional assistance.