In which scenario is a performance-based or risk-based fire safety design approach appropriate?

• A. When codes strictly require prescriptive rules
• B. When codes allow, to meet objective performance criteria beyond prescriptive rules for unusual or complex buildings
• C. For all buildings regardless of complexity
• D. Only for small, simple structures

Answer: (B)

Performance-based or risk-based fire safety design is appropriate when the code framework allows an alternative path to satisfy objective safety criteria, especially for unusual or complex buildings. In these projects the design team demonstrates, through analysis and engineering methods, that life safety, fire growth control, detection and suppression effectiveness, egress times, and structural integrity meet defined performance targets even though they don’t follow standard prescriptive rules. This approach lets designers tailor solutions to the specific risks of the building, occupant mix, and use, while still showing that safety goals are achieved.

For straightforward projects that clearly fit prescriptive rules, a prescriptive path is typically sufficient and simpler. It’s not about applying performance-based design to every building, nor is it limited to only simple structures; the key is that it’s chosen when the code permits it and the project’s risks necessitate solving unique fire safety challenges beyond fixed prescriptions.