RE: When we are using unconventional composite sections in railway bridges we are having use section wizard for creating the sections but we export the section and see the 3D view in the modelling mode we are unable to see it, why?

As of now any section defined in Free Sketch or Section builder and exported to STAAD.Pro as a general or a prismatic section, comes in with the properties only. The upt file created as a result of the export, does not contain information related to the actual shape of the section. Hence in STAAD.Pro, the section is shown as a line.