To exempt the separations of laundry rooms from the application of Sentence 3.3.1.22.(1) by permitting a reduction in fire-resistance rating from 1 h to 45 min on the basis that the floor assemblies in the building need not have a fire-resistance rating of more than 45 min and, if they failed, it would negate the remaining rating of the fire separation between the laundry room and the remainder of the floor area.
This is to supersede the requirements of Sentence 3.3.1.22.(1) and permit a lower minimum fire-resistance rating on the basis that the rating of the separation need not be any more than the other assemblies that enclose the room.