User:Subtextdesign/Mono-stringer

Mono-Stringer is an architectural term describing a support structure for staircases that utilizes a central stringer mounted underneath the treads and risers. This stringer provides the bulk of structural support for the treads of the stairs, replacing the traditional design of two separate stringers mounted on either side of the treads. A mono-stringer can be built from virtually any type of structurally sound material, although steel and structural timber are the most feasible.

Physical Limitations
A mono-stringer is commonly shaped into one continuous vertical piece with a straight top-line. This straight mono-stringer is attached to the treads of the stairs via specially designed fixings. In some cases, a mono-stringer can be crafted to fit the shape of the stairs, so that it is attached directly to the underside of each of the treads. Depending on the material used in the construction of the mono-stringer, the staircase may be able to span several stories.

Appearances in Contemporary Design
Because of their clean, stark look, mono-stringer staircases have become more popular in contemporary design. A mono-stringer staircase was featured prominently in the 2010 motion picture “The Ghostwriter.”