We were hired as subcontractors to work on a project with short deadline - only five work days. The model and stability calculations were provided to us, and it was decided that we will take the most difficult part of the fundation slab. Upper-middle part was designed to cover basement section of the previous structure, with continuing use of it. Because of it the foundation slab changes it tickness in that part. All principles of design were honored, with special care about the areas where the slab changes its dimensions, especially since the area will be used as warehouse for heavy loads.