What is the horizontal part of the stairs that you step on called?

The horizontal part of the stairs that you step on is called the tread. Treads are the flat, horizontal components that provide a surface for individuals to place their feet on when ascending or descending a staircase. They are crucial for ensuring safety and stability while using the stairs, as they contribute to the overall design and functionality of the stairway.

In contrast, the riser is the vertical part that connects one tread to the next, providing the necessary height for each step. The stringer refers to the structural support that holds the treads and risers in place, running along the sides or the center of the staircase. A landing is a flat platform that provides a level area at the top, bottom, or between flights of stairs, allowing for a safe transition. Understanding these terms is essential for proper stair design and construction, ensuring safety and accessibility.