Exit Discharge Capacity Calculator

Calculate exit discharge capacity and requirements per IBC Section 1028 and NFPA 101 Section 7.7

Input Parameters

Results

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Discharge Capacity per Exit
persons
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Total Discharge Capacity
persons
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Capacity Adequate
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Max % Through Lobby (IBC)
%
Note: Exit discharge per IBC Section 1028 and NFPA 101 Section 7.7. Discharge through building interior (lobby) limited to 50% of exits and 50% of occupant load. Lobby must be sprinklered with 1-hour separation per IBC 1028.1.

Reference

IBC 1028: Exit Discharge Requirements Capacity = Discharge width / 0.2 in per person IBC 1028.1: Max 50% of exits may discharge through building interior IBC 1028.4: Exit court min width 44 in or widest exit served NFPA 101 7.7: Discharge must be at grade level to public way Level discharge: max 1:48 slope per IBC 1028.2