The main lifts don't reach the basement because of the elevated lobby nonsense. There is one small lift which does go down there, but it's a service lift for the whole building, so it could be busy elsewhere when you want it.

My pass won't operate it anyway; you have to be specially authorized, and when I asked, our office manager didn't know how to do that.

I'm sure there is an elevator, but you typically want to avoid elevators when escaping a fire.