16.5.2 Temporary Separation Walls

Protection shall be provided to separate an occupied portion of the structure from a portion of the structure undergoing alteration, construction, or demolition operations when such operations are considered as having a higher level of hazard than the occupied portion of the building. [241:8.6.2.1]

Walls shall have at least a 1-hour fire resistance rating. [241:8.6.2.1.1]

Opening protectives shall have at least a 45-minute fire protection rating. [241:8.6.2.1.2]

Walls in 16.5.2.1.1 and opening protectives in 16.5.2.1.2 shall be permitted to be nonrated when an approved automatic sprinkler system is installed and operational. [241:8.6.2.2]