Eli5: How so firemen rapidly know the layout of large buildings in places like NYC during a large fire or emergency?

Question

Edit: Thanks for the folks that are in adjacent areas that got back to me and were kind, I was just curious as a laymen New Yorker.

UPDATE: One of my friends got back to me I guess they have blueprints and do drills and do drills and shit and that I’m not allowed to know the rest – whatever bitch tits, comments basically stated that

In: 75

Answer 1

The myriad of FDNY requirements, plans, documentation that goes into getting a building approved and built allows the FDNY to better understand the layouts and operations of most buildings. This is not limited to NYC. Most cities and towns require FD approval and walkthroughs at a minimum prior to certificate of occupancy.