The phrase "elevator shaft" refers to the vertical passage or tunnel in a building where the elevator moves up and down. It is like a big tube that allows the elevator to travel between different floors. Full definition
Most travelers will prefer this tourist - friendly location, and the carefully restored historic building that houses the hotel is full of unique touches from crown molding to the antique elevator shaft. (businesstravelerusa.com)
An elevator with windows for walls takes you upstairs via an exposed elevator shaft. (travelfish.org)
Imagine having a new tunnel underneath this mess and trying to find a place to drill a straight elevator shaft through it. (treehugger.com)