Will it fit?
At one previous job, we had a couple of 42U racks which needed to be installed on the 5th floor - pretty sure we did do a survey before delivery - but the only way they were coming in was on top of the lift. Remarkably, this worked.
Later, we needed to move them to the other side of the office (an adjoining building) to put into a more appropriate environment (a/c, decent power etc) and as they wouldn't fit through the internal doors, a few of us manhandled each rack out onto a narrow external balcony which ran across both buildings, and back in the other side. This entailed swivelling the racks round on the balcony wall. Only a small risk of them crashing to the street 5 storeys below..