Which of the following is an essential requirement for stair construction?

The requirement that stairs must have a minimum width of 36 inches is fundamental for safety and accessibility. This width allows for sufficient space for individuals to ascend and descend the stairs comfortably and safely, accommodating the potential use of mobility devices and ensuring that two people can pass each other on the stairway without difficulty. Adhering to this standard helps to prevent accidents and promotes ease of movement, aligning with building codes that prioritize public safety.

In contrast, allowing stairs to be of any height does not align with established safety guidelines. Similarly, the absence of handrails would compromise safety, as handrails are crucial for providing support and preventing falls. Lastly, while color might play a role in design aesthetics, it is not a structural safety requirement in stair construction. Hence, the 36-inch width requirement is critical for both functionality and compliance with building standards.