ICC Commercial Building Inspector Practice Test

What is the minimum height for letters on exit signs?

1. 4 inches

2. 5 inches

3. 6 inches

4. 8 inches

The correct answer is: 6 inches

The minimum height for letters on exit signs is established to ensure visibility and readability for occupants in an emergency situation. The requirement for six-inch letters is designed to be easily seen from a distance, allowing individuals to quickly locate exits in low-light or stressful conditions. This standard is consistent across various building codes and fire safety regulations, which aim to enhance safety through effective signage. The six-inch height provides a balance between visibility and space efficiency on the sign, ensuring that the message is clear without overwhelming the sign's design. Additionally, having consistent standard sizes for exit sign lettering aids in uniformity across different buildings, contributing to a broader understanding among the public regarding exit locations in emergencies. The other options do not meet the minimum requirements set forth by guidelines, as lower letter heights would reduce visibility, particularly in urgent circumstances.