Stairway Tread Terminology Explained

The question asks for the specific term used for horizontally wedge-shaped treads found in stairways. These treads are crucial components, especially when a staircase changes direction.

Understanding Stair Components

Let's examine the definitions of the given options in the context of a staircase:

• Stringers: These are the structural side supports of a staircase, running diagonally along the incline. They support the treads and risers.
• Winders: These are treads that are wedge-shaped (narrower on one side and wider on the other). They are arranged in a curve or turn within a staircase, allowing it to change direction without a landing.
• Scotia: This is a type of molding, often found beneath the nosing of a stair tread, typically forming a concave curve. It's primarily an aesthetic element.
• Newel: This refers to the large post or pillar that supports a staircase, often found at the beginning or end of a flight of stairs or at turning points.

Identifying Wedge-Shaped Treads

Based on the definitions, the treads that are horizontally wedge-shaped and used specifically to navigate turns in a stairway are identified as Winders.