A decorative step at the bottom of the stairs that usually houses the volute and the volute departure for a continuous handrail. The tread follows the flow of the volute. Spiral or circular stairs do not have a central post and there is a handrail on both sides. These have the advantage of a more uniform profile width compared to the spiral staircase. Such stairs can also be built around an elliptical or oval floor plan. The second definition of stair birth is a piece of non-slip material and/or contrasting color integrated or attached to the front of a stair step. Usually, these stairs range from just under 2 inches to 5 inches deep. They can contain materials that help prevent slipping, provide a visual aid during the next tread, and even glow in the dark to aid with power outages and emergency evacuations. When people have to leave the building, these safety devices can allow them to quickly exit through an outside exit. These sample phrases are automatically selected from various online information sources to reflect the current use of the word “stairs”. The views expressed in the examples do not represent the views of Merriam-Webster or its editors.
Send us your feedback. Square steel staircase in the German observation tower Klausenturm Another form of straight staircase is the space-saving staircase, also known as a paddle staircase or alternating staircase, which can be used for a steeper climb, but these can only be used in certain circumstances and must comply with regulations. There is no newel on the spiral staircase of the Loretto Chapel (the miracle staircase) in Santa Fe, New Mexico, USA. Worn staircase at the foot of the Roman amphitheater of Plovdiv with several repairs. Britannica.com: Encyclopedia article on stairs A staircase or staircase is a step in a staircase.  In buildings, staircase is a term applied to a complete staircase between two floors. A staircase is a staircase or staircase between landings. A staircase or staircase is one or more stairs leading from one floor to another and includes platforms, departure posts, handrails, railings and additional rooms. A staircase is a compartment that extends vertically through a building in which stairs are placed. A stair hall is the staircase, platforms, corridors or other parts of the public hall that must be crossed by walking from the entrance floor to the other floors of a building. Box stairs are stairs built between walls, usually with no support other than wall cords.  Double spiral and double helix stairs are possible, with two independent spiral staircases in the same vertical space, allowing one person to go up and another to descend without ever meeting if they choose different propellers.
For example, the Pozzo di S. Patrizio allows one-way traffic, allowing loaded and empty mules to get on and off without hindrance, while the Château de Chambord, the Château de Blois and the headquarters of Crédit Lyonnais ensure separation for social reasons. Fire escapes, although constructed with pedestals and straight stairs, are often functionally double propellers, with two separate stairs intertwined and occupying the same footprint. This is often to support the legal requirement to have two separate emergency exits. A double rope staircase has two steel beams on both sides and steps in the middle. Industry advice on designing a staircase to comply with UK regulations and standards. When used in Roman architecture, spiral staircases were usually limited to elite structures. They were later adopted into Christian ecclesiastical architecture. There is a common misconception that spiral staircases in castles rose clockwise to hinder right-handed attackers.   While clockwise spiral staircases are more common in castles than counterclockwise, they were even more common in medieval structures without a military role such as religious buildings.  Studies of spiral staircases in castles have shown that “the role and position of spirals in castles. had a much more important internal and statutory role than a military function” and that “there are sufficient examples of counterclockwise stairs in Britain and France in the [11th and 12th centuries]. There was no military ideology calling for clockwise stairs to combat efficiency or advantage.”  Straight stairs may have an intermediate landing, but it is probably more common to see stairs that use a landing or reel to create a turn in the stairs, as a straight flight with an intermediate landing requires a lot of linear space and is more commonly found in commercial buildings.