I am designing a steel bridge for BS 5400 and I need to use British Channel sections for certain members. However the Member utilization ratios are not presented in the analysis output file, instead it gives the following warning without any design check performed on the member.
***STAAD.Pro WARNING***
DESIGN CHECK PERFORMED ONLY WITH NON-COMPOSITE OR COMPOSITE I-SECTIONS.PLEASE ENSURE SECTIONS ARE COMPATIBLE
Please suggest me a way to overcome this issue.