What is the required minimum tread depth for stairs under the North Carolina Building Code?

• A. 10 inches
• B. 11 inches
• C. 12 inches
• D. 9 inches

Answer: (B)

The required minimum tread depth for stairs under the North Carolina Building Code is set at 11 inches. This specification is established to ensure safety and comfort when ascending and descending stairs. A tread depth of 11 inches provides ample space for foot placement, reducing the risk of slipping or tripping accidents. Additionally, this dimension aligns with national safety standards and best practices for stair design, thereby promoting accessibility for all users.

The code ensures that stairs are built within a range that accommodates various users, including those with mobility challenges. When tread depths are too shallow, it can be difficult to navigate the stairs safely, leading to potential hazards. Hence, adhering to the 11-inch minimum tread depth is critical for maintaining building safety and compliance with established regulations.