@Beganovic2022 I would suspect brobabul for boiler replacement. Sidewalks are easier to remove then to try and place a new boiler in a basement when the thing eventually goes bad. Several buildings I work on, with basement equipment, you have to design the replacement path.
@CareyClanton@NEXTSTL Queeny was originally a hotel that was later converted to semi private (two beds in 1 room, a no-no in modern healthcare) patient rooms. Queeny was tiny, this floor plate looks like it is 3-4 times as big as a Queeny tower floor plate. Height wise, I bet they are close.