Final answer:
In engineering, there are specific regulations and guidelines that determine the maximum riser height and minimum tread depth for stairway treads to ensure safety and comfort.
Step-by-step explanation:
In engineering, the walking surface of the stairway treads should not be steeper than a certain angle in order to ensure safety and comfortable use of the stairs. This angle is usually determined by building codes and regulations. In general, the maximum allowable riser height for stairs is around 7.75 inches or 19.7 centimeters, and the minimum allowable tread depth is around 10 inches or 25.4 centimeters.