Signs identifying interior exit stairways shall be a minimum size of _____ inches by _____ inches.

• A. 12 by 18
• B. 16 by 18
• C. 18 by 12
• D. 18 by 16

Answer: (C)

The correct answer states that signs identifying interior exit stairways shall be a minimum size of 18 inches by 12 inches. This specification is designed to ensure that the signs are easily visible and legible in emergency situations, which is crucial for occupant safety during evacuations. The dimensions prioritize visibility and clarity for anyone needing to use the exit stairways, particularly in scenarios where quick decision-making is essential.

A sign that is 18 inches by 12 inches provides a sufficient area for bold lettering and important symbols, making it easier for individuals to recognize the exit routes under stress or in low-light conditions. Proper signage is a fundamental aspect of building safety codes, which aim to minimize confusion and enhance safe egress from a building.