I'm aware that based on the 2018 Residential Code tempered glass is required around wet surfaces (i.e. bathrooms).
However, could someone tell me when this tempered glass requirement went into effect?
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It appears to have changed in the 2012 IRC when the requirement for hot tubs was also applied to bathrooms and wet areas
Here is information that references the change and a screenshot is provided below.
Significant Changes to the International Building Code, 2012 Edition via Google Books