Looking for a little clarification re: crawl space configurations and confirmation of assumptions.

Scenario:  3'10" crawlspace, 1' above grade, balance below, slab uninsulated with a 2' frost line.

• SCN_7:  Skirt extends BELOW footing a min 2' below slab
• SCN_3:  Skirt does not extend below footing, however skirt is below slab less than 2'

If footing is >2' below slab, and foundation wall is insulated, my expectation is that it is SCN_7

My expectation is that the difference between these two selectors is the distance insulation extends below slab, regardless of grade (which is triggered by "floor above/below frostline".

To work within the system I try to select what is most appropriate to the actual. But in the event of an existing evaluation I select what it could be (with R0 where applicable) in an upgrade (E) to avoid having to later update the D.