I am working on a structure where all of the steel is encased in concrete. I thought that the easiest way to do this would be to open the wide flange beam family and add the concrete as another extrusion with parameters for min coverage. This worked fine until I joined the beams with the floor slab. When I joined them, the steel also joined and disappeared. So I then decided that I would add a detail component to the section of the beam. I put in the wide flange beam section detail. I duplicated the beam family and it's type catalog and added the proper beam detail component to every corresponding beam in the type catalog. So, I loaded this into the project and it works fine. Every beam size loads the proper detail component, but when I join the beams to the floor, the detail component disappears. I find that a surprising result and did not know if there is something wrong.