Any info on fire rating of door from hallway to basement of multi?

[Johann Jells]

This place has a trashy door that looks like they wrapped a wood door in sheet metal to get it rated. I want to replace it but can't get an answer from Buildings Dept (they're still a post-sandy mess). Does anyone know what the code commonly is for these doors? I don't think it's 90 min, it could be as low as 20, a similar door in another place of mine that has passed state inspection looks like it's not fire rated at all!