Cantilevered stairs, or floating stairs, are a type of

staircase A stairwell or stair room is a room in a building where a stair is located, and is used to connect walkways between floors so that one can move in height. Collectively, a set of stairs and a stairwell is referred to as a staircase or stairway ...

cantilever A cantilever is a rigid structural element that extends horizontally and is unsupported at one end. Typically it extends from a flat vertical surface such as a wall, to which it must be firmly attached. Like other structural elements, a cantilev ...

is a beam, which is anchored at only one end. Thus cantilevered stairs have a "floating" appearance, and they may be composed of different materials, such as

wood Wood is a structural tissue/material found as xylem in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulosic fibers that are strong in tension and embedded in a matrix of lignin t ...

glass Glass is an amorphous (non-crystalline solid, non-crystalline) solid. Because it is often transparency and translucency, transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window pane ...

stone In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its Chemical compound, chemical composition, and the way in which it is formed. Rocks ...

, or

stainless steel Stainless steel, also known as inox, corrosion-resistant steel (CRES), or rustless steel, is an iron-based alloy that contains chromium, making it resistant to rust and corrosion. Stainless steel's resistance to corrosion comes from its chromi ...

History

In " I quattro libri dell'architettura",

Andrea Palladio Andrea Palladio ( , ; ; 30 November 1508 – 19 August 1580) was an Italian Renaissance architect active in the Venetian Republic. Palladio, influenced by Roman and Greek architecture, primarily Vitruvius, is widely considered to be on ...

commended staircases that are "void in the middle, because they can have the light from above" and because it is visible whether someone is already ascending or descending the stairs.

Inigo Jones Inigo Jones (15 July 1573 – 21 June 1652) was an English architect who was the first significant Architecture of England, architect in England in the early modern era and the first to employ Vitruvius, Vitruvian rules of proportion and symmet ...

and

Nicholas Stone Nicholas Stone (1586/87 – 24 August 1647) was an England, English sculpture, sculptor and architect. In 1619 he was appointed master-mason to James I of England, James I, and in 1626 to Charles I of England, Charles I. During his ca ...

used the technique in the Tulip Staircase at

Queen's House Queen's House is a former royal residence in the London borough of Greenwich, which presently serves as a public art gallery. It was built between 1616 and 1635 on the grounds of the now demolished Greenwich Palace, a few miles downriver fro ...

. Such stairs became common in the 18th and 19th centuries in Scotland, where they were known as "pencheck" stairs, used in Edinburgh townhouses and tenements, as well as in stately homes by

Robert Adam Robert Adam (3 July 17283 March 1792) was a British neoclassical architect, interior designer and furniture designer. He was the son of William Adam (architect), William Adam (1689–1748), Scotland's foremost architect of the time, and train ...

References

External links and references

On installation of cantilever stairs

International codes, relating to their construction

Statistics on cantilever stairs

What are floating stairs?
Stairs Stairways Pedestrian infrastructure {{architecture-stub