What word must be plainly marked on outside openings accessible to the fire department that communicate between floors?

• A. "DANGER"
• B. "SHAFTWAY"
• C. "FIRE ESCAPE"
• D. "HOIST COMMUNICATION"

Answer: (B)

The term "SHAFTWAY" is the correct choice for markings on outside openings accessible to the fire department that facilitate communication between floors. In the context of building design and safety, "shaftway" refers to vertical passages that may house elements like elevators, stairs, or mechanical systems. Clear identification of these openings is crucial for fire department personnel during emergencies, as it helps them quickly locate essential routes for rescue and firefighting operations.

These markings support the efficient coordination of emergency response efforts, ensuring that firefighters can navigate a building effectively while minimizing confusion. Proper labeling, such as "shaftway," allows for greater clarity and ensures that critical pathways are recognized and reached swiftly, ensuring safety for both building occupants and first responders.

Other options like "DANGER," "FIRE ESCAPE," and "HOIST COMMUNICATION" serve different purposes in the context of building safety and accessibility but do not specifically pertain to the designation of openings that connect floors in the same way that "shaftway" does. Each of these terms could relate to safety in their own right, but they do not fulfill the requirement for marking openings meant for inter-floor communication as accurately as "shaftway."