In a single family dwelling sleeping rooms, the minimum net clear opening width of windows for emergency egress is how many inches?

In a single family dwelling sleeping rooms, the minimum net clear opening width of windows for emergency egress is how many inches?

• A. 30
• B. 27
• C. 24
• D. 20

Answer: (D)

For emergency escape in sleeping rooms, the opening must be wide enough for a person to pass through. The smallest allowable width for the net clear opening is 20 inches, which ensures a feasible exit in an emergency. This dimension is part of a set of egress requirements that also include a minimum opening height (24 inches) and a minimum opening area (5.7 square feet), with the bottom of the opening not more than about 44 inches above the floor. The other numbers either refer to height or to widths greater than the minimum, so 20 inches is the correct minimum width.

For emergency escape in sleeping rooms, the opening must be wide enough for a person to pass through. The smallest allowable width for the net clear opening is 20 inches, which ensures a feasible exit in an emergency. This dimension is part of a set of egress requirements that also include a minimum opening height (24 inches) and a minimum opening area (5.7 square feet), with the bottom of the opening not more than about 44 inches above the floor. The other numbers either refer to height or to widths greater than the minimum, so 20 inches is the correct minimum width.