Construction Supervisor License Practice Exam

The minimum clear opening of an emergency escape in an R3 dwelling is what dimension?

1. 24 " high by 20 " wide

2. 24 " high by 24 " wide

3. 20 " wide by 20 " high

4. 24 " wide by 20 " high

The correct answer is: 24 " high by 20 " wide

The minimum clear opening of an emergency escape in an R3 dwelling is defined by strict building code requirements to ensure that occupants can quickly and safely exit in case of an emergency. The specified dimensions of 24 inches in height and 20 inches in width provide a sufficient opening for most individuals, including children and adults, to escape through it in urgent situations, such as a fire or other emergencies. These measurements are designed with safety in mind, offering an adequate size for rescue operations and for those trying to exit. The requirement also reflects considerations for various physical capabilities and the need to facilitate as quick and efficient an escape as possible. Other options, although they may provide different combinations of height and width, do not meet the specific criteria set by building codes for R3 dwellings, which focus on ensuring a viable and practical escape route. These other dimensions might either be too narrow or insufficiently tall to be considered acceptable for emergency egress, thereby failing to comply with safety regulations.