The minimum stair width is 22 inches.

The minimum stair width is 22 inches.

• A. 22 inches
• B. 18 inches
• C. 26 inches
• D. 24 inches

Answer: (A)

The main idea is the required minimum width a stairway must have for safe use in work environments. The standard sets 22 inches as the minimum unobstructed width, which provides enough room for a person to ascend or descend comfortably and safely, including passing by others or handling items. If the stairway were only 18 inches wide, it would be too cramped and could cause contact with railings, slowing movement and increasing risk. Wider widths like 24 or 26 inches are also acceptable and safer, but they exceed the minimum. So 22 inches is the correct minimum.

The main idea is the required minimum width a stairway must have for safe use in work environments. The standard sets 22 inches as the minimum unobstructed width, which provides enough room for a person to ascend or descend comfortably and safely, including passing by others or handling items. If the stairway were only 18 inches wide, it would be too cramped and could cause contact with railings, slowing movement and increasing risk. Wider widths like 24 or 26 inches are also acceptable and safer, but they exceed the minimum. So 22 inches is the correct minimum.