Three-Quarter-Turn Stairs

Dimensioned plan and elevation drawings of Three-Quarter-Turn Stairs measuring height and width

Three-Quarter Turn Stairs change their directions through 270° by the time the stair reaches the next floor. The direction is changed three times through three right angles, with the upper flight crossing the bottom one. In this type of construction, an open well is formed. This type of stair is normally used when a space has a greater vertical distance but a limited length. Some flights have very few risers, and the landings can provide a place to stop and rest during ascension.


*Under Development*


Width (Min.): 36” | 91.4 cm
Rise (Max.): 7” | 18 cm
Run (Min.): 11” | 28 cm
Landing (Min.): 36” | 91.4 cm
Handrail Height: 34”-38” | 86.5-96.5 cm



Drawings include:
Three-Quarter-Turn Stairs side elevation, side (person), front, plan

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Stairs, stairways, staircases, or stairwells, are building components that provide users with a means of vertical movement with the distribution of separate and individual vertical steps. In buildings, a flight of stairs refers to a complete series of steps that connects between two distinct floors.

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