The background appears to be an old fashioned lift floor indicator/dial:
Elevator Dial.jpg
Proabably no connection whatsoever, but this website gives information about the design, construction, installation, alteration and repair of lifts and conveying systems and their components:
https://up.codes/viewer/oregon/ibc-2...ing-systems#30
Curiously, there is a section which covers the 'Oregon Structural Specialty Code' or OSSC:
https://up.codes/viewer/oregon/ibc-2012
Just a thought.