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  2. Penrose stairs - Wikipedia

    en.wikipedia.org/wiki/Penrose_stairs

    He did not realize that his figure was a continuous flight of stairs while drawing, but the process enabled him to trace his increasingly complex designs step by step. When M.C. Escher's Ascending and Descending was sent to Reutersvärd in 1961, he was impressed but didn't like the irregularities of the stairs (2 × 15 + 2 × 9).

  3. Dog-leg (stairs) - Wikipedia

    en.wikipedia.org/wiki/Dog-leg_(stairs)

    A dog-leg staircase A quarter-landing, on a dog-leg staircase, is made into an architectural feature, by the use of arches, vaulting and stained glass. A dog-leg is a configuration of stairs between two floors of a building, often a domestic building, in which a flight of stairs ascends to a quarter-landing before turning at a right angle and continuing upwards. [1]

  4. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    The reason is that on a continuous flight of stairs, people get used to a regular step and may trip if there is a step that is different, especially at night. The general rule is that all steps on the same flight must be identical. Hence, stairs are typically custom made to fit the particular floor to floor height and horizontal space available.

  5. Nude Descending a Staircase, No. 2 - Wikipedia

    en.wikipedia.org/wiki/Nude_Descending_a...

    The 1937 drawing Femme nue montant l'escalier by Joan Miró conserved at his foundation in Barcelona. The cover and title of Dude Descending a Staircase (2003), a music album by Apollo 440. The same-titled instrumental on Bruce Cockburn's music album Life Short Call Now (2006). The play Interrogating the Nude by Doug Wright

  6. Stair tread - Wikipedia

    en.wikipedia.org/wiki/Stair_tread

    So called as they look like a D shape attached to the end of the tread. A common style that may be carried up the flight for a number of treads. Tower. The tower feature is a cylindrical addition to the front corner of a tread, intended for setting a newel post onto, the tower may be positioned dependent on the handrail termination. Commode front.

  7. Stair climbing - Wikipedia

    en.wikipedia.org/wiki/Stair_climbing

    Falling down a flight of stairs or just a couple of steps is very common during infants’ first exposure to stair descent. Infants are more likely to fall down stairs than any other age group. [3] In the United States, approximately 73,000 children between the ages of 6 months and 2 years have reported injury on stairs or steps in 2009. [4]

  8. Escalator - Wikipedia

    en.wikipedia.org/wiki/Escalator

    Similarly, the root word "scala" does not mean "a flight of steps", but is the singular form of the plural noun "scalae", which can denote any of: "a flight of steps or stairs, a staircase; a ladder, [or] a scaling-ladder." [21] The alleged intended capitalization of "escalator" is likewise a topic of debate. Seeberger's trademark application ...

  9. Ascending and Descending - Wikipedia

    en.wikipedia.org/wiki/Ascending_and_Descending

    Two figures sit apart from the people on the endless staircase: one in a secluded courtyard, the other on a lower set of stairs. While most two-dimensional artists use relative proportions to create an illusion of depth, Escher here and elsewhere uses conflicting proportions to create the visual paradox.