Massachusetts Unrestricted Construction Supervisor License Practice Test

The minimum amount of glazing area required for a habitable room in a single-family dwelling measuring 20 ft. x 30 ft. is ____ square feet?

1. 24

2. 36

3. 48

4. 60

The correct answer is: 48

To determine the minimum glazing area required for a habitable room in a single-family dwelling, specifically in Massachusetts, you need to refer to the regulations that dictate the amount of natural light necessary for such spaces. The glazing area, which includes windows and doors, is typically calculated as a percentage of the floor area of the room. In this case, the dimensions of the room are 20 feet by 30 feet, giving a total floor area of 600 square feet (20 ft x 30 ft = 600 sq ft). Massachusetts building code generally requires that a habitable room have at least 10% of its floor area in glazing. Calculating 10% of 600 square feet gives us 60 square feet (0.10 x 600 = 60 sq ft). This amount ensures that the room receives an adequate amount of natural light, contributing to the overall livability and comfort of the space. Thus, the minimum amount of glazing area required for this habitable room is correctly identified as 60 square feet, which aligns with the relevant building codes.