Which aspect is included in evaluating the safety of stairways?

Evaluating the safety of stairways is crucial in ensuring the well-being of individuals who use them. Railing stability and tread depth are essential elements in this assessment. Railing stability is critical because it provides support and prevents falls, especially for those who may need assistance while traversing the stairs. The depth of the treads is equally important since it determines how safe and comfortable it is for users to place their feet while ascending or descending. Adequate tread depth prevents slips and tumbles.

While other factors like lighting and the physical dimensions of staircases can influence safety, they do not directly address the structural aspects that play a pivotal role in preventing accidents on stairways. Lighting fixtures can enhance visibility, and differing widths may affect usability, but they are secondary to the foundational elements of stability and design inherent in railings and treads.