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cherry-popsicle t1_j67b4b8 wrote

I’ve seen ones with just a single slash, not an X. Do they mean similar things?

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Master_Dogs t1_j69kyvd wrote

It's basically a caution sign. Firefighters can enter, but use caution.

An X is more severe. Firefighters should only enter if absolutely necessary, like to save a person inside. Otherwise firefighting occurs from the outside only.

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