What is the maximum fire-resistance rating for assemblies where fire-protection rated glazing is allowed to be used in fire window assemblies?

The maximum fire-resistance rating for assemblies where fire-protection rated glazing can be utilized in fire window assemblies is indeed 1 hour. This is based on fire safety regulations that dictate how long certain building elements can withstand the passage of fire before they fail. In essence, fire-protection rated glazing is specifically designed to maintain its integrity under exposure to fire, but it is limited in terms of its fire-resistance rating.

In this context, fire window assemblies that incorporate fire-protection rated glazing are typically required to comply with specific performance criteria that generally align with a 1-hour rating. This means that while the glazing may provide a barrier to flames and heat for that duration, it is not intended for longer periods, which are designated for other types of fire-resistive assemblies. Understanding these limitations is crucial for building safety and compliance with fire codes, hence the importance of recognizing the correct maximum rating for these assemblies.