Alternating-tread Stairs, Alternating stairs, Thomas Jefferson Stairs, Jeffersonian staircases, Ergonomic stair with staggered treads, Zig-zag-style, Boat Paddle-shaped treads, Ship’s Ladder, Alternating-tread devises, Tiny-house stairs, and Crows-foot stairs

Space-saving Stairs have been used widely in Europe for many years and now have become quite popular in the US with the rise of the Tiny House movement. A further boost has been given to the Space-saving staircase with the major building codes in the US allowing them.