Under Alabama building codes, what is the required minimum width for emergency egress windows in basement bedrooms?
Correct Answer
C) 20 inches
Alabama building codes require emergency egress windows in basement bedrooms to have a minimum width of 20 inches.
Why This Is the Correct Answer
Option C (20 inches) is correct. Alabama building code (based on the International Residential Code) requires emergency escape and rescue openings in basement sleeping rooms to have a minimum clear opening width of 20 inches. This ensures occupants can escape and rescuers can enter.
Why the Other Options Are Wrong
Option A: 24 inches
24 inches exceeds the minimum required width. While a wider window is acceptable, stating 24 inches as the minimum is incorrect and would be unnecessarily restrictive.
Option B: 22 inches
22 inches is not a standard IRC/Alabama egress width requirement. This distractor sits between the correct 20-inch minimum and the 24-inch distractor, designed to attract guessers who think the answer is somewhere in the middle.
Option D: 18 inches
18 inches is below the required minimum and would not provide adequate egress. An 18-inch-wide opening is too narrow for an adult to escape or for emergency responders to enter.
Memory Technique
Memorize the egress window trio: '20-24-5.7' — Width 20 in., Height 24 in., Area 5.7 sq ft (5.0 sq ft basement). Think '20 wide, 24 tall, 5.7 area.' Width is always the smaller of the two linear dimensions.
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