Staircase layout: the wedge-shaped steps used to change direction of stairs without a landing are commonly known as what in building construction?

Introduction / Context:
When a staircase turns (commonly by 90° or 180°) without a square landing, triangular or wedge-shaped treads are often used to effect the change in direction. Identifying the correct term is a frequent topic in architectural drafting and building construction exams.

Given Data / Assumptions:

• Steps taper from a wide outer edge to a narrow inner edge around a newel or turning point.
• No intermediate landing is present in the turn zone.
• Terminology distinguishes form and function.

Concept / Approach:
These wedge-shaped treads are called winders. They replace a flat landing to change direction within a compact footprint. While “radial” or “circular” may describe geometry generically, the technical term used in plans and specifications for such steps is “winder.”

Step-by-Step Solution:
Recognize wedge-shaped treads → winders.Other names (round/circular/radial) are descriptive, not standard specification terms.Choose “Winders.”

Verification / Alternative check:
Building codes and drafting standards label these steps as winders and provide minimum goings for safety.

Why Other Options Are Wrong:

• Radial/round/circular/angular steps: informal or ambiguous; not the specific term for wedge treads used in turning stairs.

Common Pitfalls:
Using winders where codes require landings for accessibility; insufficient going at the narrow end causing unsafe stairs.

Final Answer:
Winders