this post was submitted on 24 Apr 2025
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As others have said, these are NFPA signs.
What I want to know is why there are two different ones. What the hell does that mean?
Two different chemicals to be aware of
But it's just slapped on the side of the building with no indication of which chemicals the labels are for, I don't think that's how it's supposed to be done. It'd be like mixing two chemicals into a bottle and then putting two labels on it.
I think there should just be one label that combines the warning levels of both i.e. 3-2-2-W
I'm sure they'll be labelled inside too.
Sure, but I don't think the building should have two labels. I think it should have one label that reflects a warning for everything in the building.
Imagine you have a crate with two different chemicals. The chemicals are in different bottles so they aren't mixed, and each bottle has its own label.
Should the crate have two unidentified labels like this, or one? There's no indication what those labels refer to on the building.
if the chemicals are extremely different in hazard it could be useful to know that it's not a mixture, like a superacid and a strong base.