The phrase "central staircase" refers to a staircase that is located in the middle or center of a building, serving as a main or primary means of going up and down between floors. Full definition
A glass walled central staircase connects the peaceful ground floor living room with the upper lounge, where sliding doors open to welcome in a therapeutic sea breeze. (luxuryretreats.com)
You may not notice the passive solar system, rainwater capture or LED lights, but you'll be stunned by the floor plan, designed to make the most of the ocean views, and the extensive use of native woods, including in a helix - like central staircase in the airy great room. (luxuryretreats.com)
A new central staircase has been constructed, along with a visitors» lounge, café, and lobby where the ramp once existed, and on the second floor, a new gallery has been incorporated into a pre-existing exhibition space. (galeriemagazine.com)