Fenestration Egress Calculator — Construction Corps

IRC R310 Code Requirements

5.7 sq ft

Min. Net Clear Area

5.0 sq ft

Min. Area (Grade Floor)

20 in

Min. Clear Opening Width

24 in

Min. Clear Opening Height

44 in

Max. Sill Height AFF

5.7 sq ft

Basement Min. Area

Important Notes: Fixed windows are never compliant as emergency egress. Security bars and grilles must have a quick-release mechanism operable from inside without tools or keys (IRC R310.4). Basement bedroom window wells must allow window to fully open and provide minimum 9 sq ft of horizontal area with a minimum 36" dimension.

Rooms & Windows

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Analysis Results

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Total Rooms Analyzed

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Compliant Rooms

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Non-Compliant Rooms

Room-by-Room Breakdown

Room	Type	Windows	Compliant Windows	Room Status	Issues

Code References

IRC R310.1

Emergency escape and rescue openings required in basements and sleeping rooms. Every sleeping room must have at least one compliant opening.

IRC R310.2

Minimum net clear opening dimensions: 5.7 sq ft (5.0 sq ft at grade floor), min. 24" height, min. 20" width. Max sill height 44" AFF.

IRC R310.2.1

Window wells for below-grade openings must allow window to fully open and provide minimum 9 sq ft horizontal area with at least 36" in each dimension.

IRC R310.4

Bars, grilles, grates, or screens must have a quick-release mechanism operable from inside without key, tool, or special knowledge.