Workflow of creating Box culvert in Open roads

Hi, I am trying to explore the options for creating Box culvert within Open road designer. Can some one help me in understanding to create box culverts, CUP, VUP etc.. can we make 3D model within ORD or we have to do the 3D model in any other software and import in to ORD. Can you please advice the best practice for Box culverts, CUP, VUP etc. i do not see any option for this in Open bridge modeler as well..