Which of the following is a typical requirement for stair construction in low-occupancy single-family homes?

Which of the following is a typical requirement for stair construction in low-occupancy single-family homes?

• A. 8 inches
• B. 9 inches
• C. 12 inches
• D. 10 inches

Answer: (D)

Stair design in homes is guided by providing a safe, comfortable foothold. The going, or tread depth, is the part you stand on, and residential practice typically sets a minimum around 10 inches. That depth gives enough surface area for most shoes to land securely with each step, helping maintain a steady stride and reducing the chance of slipping or misstepping. Too shallow a tread (like 8 or 9 inches) tends to feel cramped and can compromise safety, while a much deeper tread (like 12 inches) makes the stairs longer than necessary for a typical residential layout. So, 10 inches strikes the common balance between safety, comfort, and efficient use of space in low-occupancy single-family homes.

Stair design in homes is guided by providing a safe, comfortable foothold. The going, or tread depth, is the part you stand on, and residential practice typically sets a minimum around 10 inches. That depth gives enough surface area for most shoes to land securely with each step, helping maintain a steady stride and reducing the chance of slipping or misstepping. Too shallow a tread (like 8 or 9 inches) tends to feel cramped and can compromise safety, while a much deeper tread (like 12 inches) makes the stairs longer than necessary for a typical residential layout. So, 10 inches strikes the common balance between safety, comfort, and efficient use of space in low-occupancy single-family homes.