A building where 16 or more persons reside on a 24-hour basis and receive custodial care is classified as which group?

The classification of a building where 16 or more persons reside on a 24-hour basis and receive custodial care falls under Group I-1. This classification is specifically designated for facilities that provide supervision and personal care for individuals who may not be capable of self-preservation due to physical or mental limitations.

Group I-1 includes settings such as residential care facilities, group homes, and assisted living facilities where residents have varying degrees of independence but still require custodial assistance. The key aspect of this classification is the continuous supervision and the nature of care provided, which differentiate it from other groups where the level of care and residency type differs significantly.

In contrast, other groups mentioned do not cater to the same population or level of care. For instance, Group I-2 pertains to medical care facilities such as hospitals, while Group I-4 relates to day care facilities for children or adults who typically do not reside on-site. Group R classifications generally refer to residential facilities such as apartments or single-family homes, which do not specifically focus on custodial care.