© 2025 SAFTI FIRST. All rights reserved.
Fire Rated openings
Fire rated windows or openings, sidelites and transoms tested to NFPA 257 / UL 9 / CAN/ULC S106.
What are Fire rated OPENINGS?
Fire rated openings (sometimes referred to as fire rated windows) are tested to NFPA 257 / UL 9 / CAN/ULC S106. This includes a fire endurance test and hose stream test. These fire rated openings contain flames and smoke only, not radiant heat. Because of this, they are typically rated up to 45 minutes only (with the exception of some exterior 90 minute openings, depending on fire separation distance). For interior applications, they are further limited to 25% of the wall area. Glazing used in fire rated openings are considered fire protective, and are marked with OH (opening, hose stream) and the corresponding minute rating (ex. OH-45).
Our fire protective openings use clear fire protective glazing without wires or tints. They can be used in 45 minute fire protective windows, openings or borrowed lites.
Fire PROTECTIVE framing Options

GPX® Architectural Series Fire Protective
45 Minute Fire Protective Sidelites, Transoms, Windows/Openings
Fire rated aluminum framing with narrow profiles and uniform sightlines. Used with 45 minute glazing for fire protective interior and exterior applications.

GPX® Builders Series Fire Protective
20-45 Minute Fire Protective Windows/Openings
Fire protective hollow metal framing. Used with Used with 45 minute glazing for fire protective interior and exterior applications.

GPX® EZ Frame
45 Minute Fire Protective Sidelites, Transoms, Windows/Openings
Flexible, economical and creative solution for fire protective openings or fire resistive walls without visible metal framing.

GPX® Architectural Series Fire Protective
45 Minute Fire Protective Sidelites, Transoms, Windows/Openings
Fire rated aluminum framing with narrow profiles and uniform sightlines. Used with 45 minute glazing for fire protective interior and exterior applications.

GPX® Builders Series Fire Protective
20-45 Minute Fire Protective Windows/Openings
Openings
Fire protective hollow metal framing. Used with Used with 45 minute glazing for fire protective interior and exterior applications.

GPX® EZ Frame
45-120 Minute Fire Rated Sidelites, Transoms, Windows/Openings
Flexible, economical and creative solution for fire protective openings or fire resistive walls without visible metal framing.

Superior Optical Clarity
Compared to wired glass and tinted ceramics, our fire rated windows or openings are combined with truly clear fire protective glazing, which include our patented, revolutionary SuperClear® 45-HS (hose stream) and SuperClear® 45-HS-LI (hose stream, low-iron) products.
Fire rated WINDOW OR OPENING Applications
Our fire rated windows or openings can be used in the following applications: 45 minute fire protective windows, openings or borrowed lites. Can be used in interior and exterior fire rated applications.
Featured Videos
Browse our collection of educational video resources to help you learn more about fire rated glass and framing.

What is the safest and most affordable fire protective product available in the market today?
Season 1 Episode 6: What is the safest and most affordable fire protective product available in the market today? Tim Nass, VP of Sales at SAFTI FIRST®, answers our industry's most frequently asked questions.

The Latest Innovations in Fire Rated Glazing Product Technology
SAFTI FIRST®'s VP of Sales Tim Nass shares the latest innovations in fire rated glazing product technology, and how these advancements have influenced the architectural and design community. He discusses the evolution of fire rated glazing and how the introduction of SuperClear® 45-HS-LI, the clearest, 45 minute fire rated glazing product that meets fire, safety, and hose stream requirements, will provide an affordable and superior solution to brittle, expensive ceramics.

NEW! Revolutionary, Clear, USA-Made SuperClear® 45-HS-LI (Patented)
SAFTI FIRST®’s new SuperClear® 45-HS and SuperClear® 45-HS-LI are approved for glazing in all 45 minute doors, sidelites, transoms and openings in large sizes. Meets strict fire, hose stream and safety requirements without wires, tints, films or laminates. Made in the USA for fast lead times—at costs significantly less than ceramics or safety wired—with better VLT, STC and OITC performance values. UL listed and labeled. Patented.