Notch required for sloping rafter on hanger?

Can a 2:12 lean-to roof have its rafters sit only on the edge of the seat of 90 degree face mount joist hanger … or is mandatory to cut a… Can a 2:12 lean-to roof have its rafters sit only on the edge of the seat of 90 degree face mount joist hanger … or is mandatory to cut a…Read MoreGreenBuildingAdvisor