The total run of a stairway is which of the following?

The total run of a stairway is which of the following?

• A. The sum of the tread run
• B. The sum of the tread width
• C. The product of rise and run
• D. The total width

Answer: (A)

The total run of a stairway refers to the horizontal distance covered by the stairs, which is derived from the sum of the tread run, or the individual horizontal components of each step. Each tread has a certain depth, and when you add those depths across all the treads in the stairway, you get the total run. The tread run is specifically the horizontal part of each stair step where a person places their foot. This is crucial for determining the usability and comfort of the stairway, as well as for adhering to building codes. While the other options might seem related to aspects of stair design, they do not accurately capture the definition of total run. For example, the sum of the tread width would pertain to the amount of space each tread occupies from side to side, which isn't the same as measuring the distance across the entire staircase. The product of rise and run is a term more associated with the slope or angle of the stairs rather than the total run, and the total width refers to the breadth of the whole staircase structure. Thus, the correct choice effectively identifies the total run as the cumulative horizontal distance across the treads.

The total run of a stairway refers to the horizontal distance covered by the stairs, which is derived from the sum of the tread run, or the individual horizontal components of each step. Each tread has a certain depth, and when you add those depths across all the treads in the stairway, you get the total run.

The tread run is specifically the horizontal part of each stair step where a person places their foot. This is crucial for determining the usability and comfort of the stairway, as well as for adhering to building codes.

While the other options might seem related to aspects of stair design, they do not accurately capture the definition of total run. For example, the sum of the tread width would pertain to the amount of space each tread occupies from side to side, which isn't the same as measuring the distance across the entire staircase. The product of rise and run is a term more associated with the slope or angle of the stairs rather than the total run, and the total width refers to the breadth of the whole staircase structure.

Thus, the correct choice effectively identifies the total run as the cumulative horizontal distance across the treads.