I had a discussion with a supervisor today regarding the NIMS terminology when referring to parts of a structure. My basic question is what the interpretation of the level of a structure is, i.e. when do you switch from calling yourself Division 1 to Division 2. The question was in regard to a structure like a 3 step ranch or quad level home where you have a small number of stairs that seperate areas of the house is that really a different level? I didn't really have a good answer, looking for some input from everyone else or someone had a department SOG with a good definition of what a level of a structure is. Thanks, stay safe out there.