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this post was submitted on 20 Jul 2024
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...that'd take a deep dive into obsolete building codes to identify exactly when the concept was first introduced: BOCA, southern/standard, and uniform building codes all merged into IBC about twenty-five years ago so we're talking about old paper code books from twentieth century...
...areas of refuge are closely tied to modern accessibility standards which arose from the ADA in 1990; i'm guessing they were widely introduced sometime in that decade, possibly earlier for high-rises or hazardous occupancies, but they were definitely part of 1997 UBC (which most of california enforced) and 2000 IBC...
(i started working professionally in 1993 and every project i worked on was fully accessible, but adoption varied across different jurisdictions and when i worked in california a decade later they were waaaay less accessible than texas)