Final answer:
Emergency escape and rescue openings must have a minimum net clear opening of 5.7 square feet, or 5 square feet if on the ground floor, as per the International Residential Code.
Step-by-step explanation:
The question refers to building codes regarding the size of emergency escape and rescue openings. While this requirement can vary by jurisdiction, the International Residential Code (IRC) generally specifies that emergency escape and rescue openings should have a minimum net clear opening of 5.7 square feet. However, if the opening is on the ground floor, the minimum net clear opening must be 5 square feet. This requirement ensures that in case of an emergency, individuals have a sufficient opening to escape or be rescued through.
It's crucial to note that these dimensions are minimum requirements and additional considerations such as the height and width of the opening, as well as accessibility for the intended occupants, should be taken into account.