I have a slab that a building sits on - the slab becomes the sidewalk outside the building for 8'-0" of width and then it becomes a sloped ramp 4'-0" of width to the parking area - so there is no curb. So, I cannot find out how to take a slab edge and slope id down from 4" thick to 0" thick over a 4'-0" width.
For clarification: the parking area ends 12'-0" from the face of the building - so you step out of the building, walk 8'-0" towards the parking area on flat slab and then you walk another 4'-0" towards the parking area on a sloped walk and then end up on the parking pavement. The sidewalk is the full length of the building (roughly 25-0").
I looked into slab edge profiles but I cannot find one that subtracts instead of adds volume. Is there a way to use massing to 'subtract' from the slab volume for this?