Unknown Construction / Unknown Occupancy Combinations

AIR provides construction and occupancy codes to represent cases in which the construction class and/or unknown occupancy type are unknown. For onshore locations, the construction class code 100 represents unknown construction, while the occupancy class code 300 represents unknown occupancy. For offshore locations, the construction class code 800 represents unknown construction, while the occupancy class code 900 represents unknown occupancy.

Touchstone also supports non-AIR construction and occupancy class codes, although AIR always recommends translating non-AIR codes to AIR codes wherever possible before importing your data.

If you attempt to import a location with a blank construction or occupancy code, AIR ImportExpress rejects this location.

The following table lists the results of a variety of unknown construction and/or unknown occupancy class code combinations:

Construction Class Code A	Construction Class Code B	Occupancy Class Code	Result
Unknown	Unknown	Unknown	Imports successfully. During analysis, Touchstone assigns General Commercial or Unknown Offshore Asset Occupancy as the occupancy code.
Known	Unknown	Unknown	Imports successfully. During analysis, Touchstone assigns construction class code A to construction class code B.
Unknown	Known	Unknown	Imports successfully. During analysis, Touchstone assigns construction class code B to construction class code A.
Known	Known	Unknown	Imports successfully.
Unknown	Unknown	Known	Imports successfully.
Known	Unknown	Known	Imports successfully.
Unknown	Known	Known	Imports successfully.
Known	Known	Known	Imports successfully.

Touchstone 5.0 Updated July 09, 2019