Hi all. Our firm is designing the foundations on a new building and we have been asked to use the attached detail for the grade walls. I have a few concerns regarding this detail, such as the settlement of the slab, the metal studs bearing on rigid insulation, and room for the connection of the metal studs to the block below. I suppose the settlement of the slab could be addressed with the proper compaction of the fill but is my concern justified on the other two points? Does anyone have a suggestions on a better approach? It is my understanding that the builder is concerned about meeting the insulating requirements of the local jurisdiction and is the reason he proposed this detail. Thank you in advance for your thoughts and suggestions.