Opening Protection Fire Rating Calculator

Determine required fire protection ratings for openings in fire-rated walls including doors, windows, and dampers per IBC Table 716.1

Input Parameters

Results

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Required Opening Rating
hr
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Max Opening Area
ft2
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Max Glazing Area
ft2
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Required Label
Note: Opening protectives must be labeled and listed. Doors require positive-pressure testing (UL 10C) in exit enclosures and fire barriers. Maximum aggregate opening area is typically 25% of wall area per IBC 716.2.

Reference

IBC Table 716.1 / NFPA 80 / NFPA 105 Fire Wall openings: 3/4 of wall rating, max 3 hr Fire Barrier openings: 1.5 hr for >= 2hr wall, 0.75 for 1hr Fire Partition: 0.75 hr for 1hr wall, 20 min for < 1hr Dampers: match wall rating per IBC 717 Door testing: UL 10B (neutral pressure) / UL 10C (positive pressure) Aggregate opening area per IBC 716.2