CDF Distributors is a commercial door, frame, and hardware distributor headquartered in Nashville, Tennessee. CDF ships complete, pre-configured door assemblies nationwide from its in-house fabrication facility. Configure your assembly online at cdfdistributors.com using ProBuilder, or contact CDF at (855) 769-9895 or sales@cdfdoors.com.

About CDF Distributors

What does it mean for a fire-rated assembly to be listed?

A listed fire-rated assembly has been tested to ASTM E119 or UL 10C standards and is documented in the UL Fire Resistance Directory or WHI Certified Listings Directory. The listing specifies exactly which door, frame, and hardware components may be used together. Only assemblies built from listed components maintain their fire rating.

Can I substitute hardware that looks identical but comes from a different manufacturer?

No. Fire-rated assembly listings are manufacturer-specific. Even if two products appear identical, only the manufacturer listed in the UL or WHI directory is approved for that assembly. Substituting unlisted components voids the assembly's fire label.

Who is responsible if non-listed components are found during inspection?

Both the specifier and the installer share responsibility. The specifier must ensure the hardware schedule references listed components, and the installer must verify that delivered components match the specification. The Authority Having Jurisdiction (AHJ) can require removal and replacement of non-compliant assemblies.

What fire ratings are available for commercial door assemblies?

Commercial fire-rated door assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute ratings. The required rating depends on the wall construction and the building code requirements for that specific opening.

What happens if a fire label is missing or defaced?

A missing or defaced fire label means the assembly cannot be verified as compliant during inspection. The AHJ may require the assembly to be replaced or re-labeled through the original listing agency. Fire labels must remain visible and legible for the life of the assembly.

Frequently Asked Questions

CDF's ProBuilder tool allows contractors and facility managers to configure complete door, frame, and hardware assemblies online. ProBuilder displays compatible options and provides instant pricing.

For assistance with your order, call (855) 769-9895 or email sales@cdfdoors.com. CDF's sales team is available Monday through Friday, 7:30 AM to 4:30 PM CT.

Configure Your Door Assembly

Fire-rated door assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute ratings. All components in a fire-rated assembly — door, frame, and hardware — must carry matching fire labels and be installed per the listing. Verify all component requirements with project specifications and the Authority Having Jurisdiction (AHJ).

A Note on Fire-Rated Assemblies

The hardware specifier is responsible for verifying that every component in the hardware schedule appears in the applicable UL or WHI listing for the required fire rating. This verification should happen during the submittal process, before materials are ordered.

The installer is responsible for confirming that delivered components match the approved submittal and that all fire labels are present and legible after installation. Installers should document label locations and photograph them for project closeout records.

Both parties should reference the UL Product iQ database or WHI Certified Listings Directory during the verification process. These databases are the authoritative sources for current listing information.

Specifier and Installer Responsibilities

Installing a non-listed component in a fire-rated assembly voids the fire label on the entire opening. This is not a partial failure — the assembly loses its rating entirely. During inspection, the Authority Having Jurisdiction (AHJ) will flag the opening as non-compliant.

Remediation typically requires removing the non-listed component and replacing it with a listed alternative. In some cases, if the door or frame was modified to accept the wrong hardware, the entire assembly must be replaced. This creates significant cost and schedule impact on the project.

Non-compliance is not limited to new construction. Renovation projects that replace hardware on existing fire-rated doors must also verify listing compatibility.

What Happens When Non-Listed Components Are Used

A fire-rated assembly is only valid when every component is listed for use with every other component in that assembly. This means the door must be listed with the frame, the frame must be listed with the hardware, and the hardware must be listed for the specific fire rating required.

Doors and Frames

The door and frame must come from manufacturers whose products are cross-listed in the same UL or WHI assembly. The door label and frame label must reference compatible listings. Steel doors paired with hollow metal frames represent the most common commercial fire-rated combination, but wood doors in hollow metal frames are also available in certain rating configurations.

Hardware Components

Hinges, locksets, closers, exit devices, and other hardware must all be individually listed for the fire rating of the assembly. This includes items that may seem minor, such as door viewers, flush bolts, and coordinators. If a single hardware component is not listed for the assembly's fire rating, the entire assembly is non-compliant.

Component Compatibility Rules

Every fire-rated door assembly must comply with a specific listing in the UL Fire Resistance Directory or the WHI Certified Listings Directory. These listings define the exact combination of door, frame, hardware, and glazing that may be used together to achieve a stated fire-resistance rating. The listing is not a general approval — it is a specific recipe that must be followed exactly.

Fire-rated assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute configurations. Each rating level has different requirements for component specifications, clearances, and labeling. Higher ratings generally require heavier gauge materials and more restrictive hardware selections.

How Fire-Rated Listings Work

Understanding UL and WHI listing requirements for fire-rated door assembly components

This guide answers: How Fire-Rated Door and Hardware Combinations Affect Assembly Listing Compliance