Glazing used in partitions with ratings higher than 1 hour must be fire RESISTANCE rated glazing.
Fire PROTECTION rated glazing, on the other hand, must be limited to 1 hour fire partitions or fire barriers.
Fire protective glass (aka fire protection rated glazing) is designed to compartmentalize smoke and flames and is subject to application, area, and size limitations under the IBC. Fire protective glass is limited in application and size because it does not block radiant heat transmission.
Fire resistive glass (aka fire resistance rated glazing), on the other hand, is not limited in application or size. It does compartmentalize smoke and flames, and blocks the transmissions of dangerous levels of radiant heat through the glazing. As a result, it can be used in wall and door applications 60 minutes and above without the size limitations that apply to fire protective glass.