Massachusetts Construction Supervisor License (CSL) Practice Test

Is a sliding patio door permitted as a required means of egress in a single family dwelling?

1. No

2. Yes

3. Only if it is triple-glazed

4. Only with additional security measures

The correct answer is: Yes

A sliding patio door is generally permitted as a means of egress in a single-family dwelling because it meets the necessary criteria established by building codes for emergency exits. Specifically, the opening must provide adequate width and height to allow for a person to exit freely in case of an emergency. Typically, these doors can be opened from the inside without special tools or knowledge, which is another critical requirement for an egress door. Moreover, the large glass surface often found in sliding patio doors also facilitates visibility, making it easier to see if the exit is safe. As long as the door meets the dimensions for egress openings, it is an acceptable option for complying with building safety regulations. The inclusion of materials such as triple glazing or additional security measures, while potentially advantageous for energy efficiency or safety, is not a requirement for the door to qualify as an egress option. In practice, local building codes may have specific provisions concerning egress doors, but the general acceptability of sliding patio doors as a means of egress reflects a broader understanding in residential construction safety standards.