What is the required minimum horizontal size for an escape window?

The required minimum horizontal size for an escape window is 20 inches. This measurement is crucial for ensuring that occupants can safely exit a building in case of an emergency. The escape window must be large enough for a person to get through easily without devices or tools that might impede their movement.

Additionally, having a window that meets this size requirement allows for a reasonable level of accessibility and safety compliance with building codes. Code regulations often focus on both the height and width of escape windows to facilitate emergency egress. Thus, the minimum horizontal dimension of 20 inches helps ensure that individuals can exit swiftly and securely during emergencies, which is a fundamental aspect of safety in building design and construction.