Which design consideration in egress routes is intended to limit blast effects and debris exposure for exiting personnel?

• A. Blast-resistant design of the route.
• B. Using decorative finishes.
• C. Narrowing exits to control flow.
• D. Increasing signage only.

Answer: (A)

Designing egress routes to protect exiting personnel from blast effects focuses on blast-resistant design of the route. This means building the path with features that can withstand blast pressures, keep the route structurally intact, and deflect or limit debris that could reach people as they evacuate. By reinforcing walls and doors, using protective barriers, and ensuring the escape path remains open and clear, occupants have a safer way out even in a blast, reducing exposure to dangerous fragments and overpressure.

Decorative finishes don’t provide blast resistance and can even become hazards under blast conditions. Narrowing exits to control flow reduces egress capacity and can trap people, increasing risk rather than reducing blast exposure. Increasing signage alone helps with finding the way, but it does not lessen exposure to blast effects or debris.