steel
A staircase whose supporting framework is made from steel members, regardless of its nonstructural finish.
A steel staircase is a set of steps in a built object whose supporting framework is built of steel, a strong iron-based alloy containing carbon. The tensile strength of steel makes it suitable for almost any stairway configuration, and it is one of the best materials for freestanding staircases (like many helical stairways for example). It is also useful for staircases that bridge a wide space without supporting columns in the middle.
The steel members carry the steps and stabilize the stairway. A coating or covering over them does not change their structural material.
Steel is distinct from the cast or wrought iron covered by iron staircases. Both can provide metal framing, but their material identities differ.
steel Photos
Related definitions
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hewn stone
A staircase cut into natural rock already present at the site, whether exposed or covered by a floor finish. -
iron
A staircase supported by cast, wrought, or other iron members, distinguished from a steel staircase frame. -
masonry
A load-bearing staircase frame built of bricks, rocks, or other hard pieces stacked and joined together. -
precast concrete
A staircase supported by concrete components cast away from the construction site and delivered in sections or as a complete unit. -
reinforced concrete
A staircase supported by steel-reinforced concrete, usually poured in place and often integrated with the building frame. -
wood
A staircase whose supporting framework is made of wood, distinct from a wooden finish over another structural material.