Results
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Available Safe Egress Time (est)
s
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Required Safe Egress Time
s
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Safety Margin (ASET - RSET)
s
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Fire Dept On-Scene Time
s
Note: ASET (Available Safe Egress Time) should be determined through fire modeling (FDS, CFAST). The default 300s is a conservative estimate for a medium-growth fire in a typical room. RSET must always be less than ASET for life safety. Per NFPA 101 and SFPE Engineering Guide to Performance-Based Fire Protection.
Reference
RSET = t_detection + t_alarm + t_pre-movement + t_travel
ASET = time to untenable conditions (requires fire modeling)
Safety Margin = ASET - RSET > 0 required
FD On-Scene = t_detection + t_alarm + t_FD_response
Ref: NFPA 101 Life Safety Code, SFPE Engineering Guide to Performance-Based Fire Protection