Complete Hardware Solutions for UL Certified Hollow Metal Doors

For commercial hollow metal door manufacturers and architectural specifiers operating in North American markets, UL certification represents the definitive standard for fire safety. A UL-listed fire door is only compliant when every piece of hardware installed on it carries matching UL certification — from hinges and locks to closers and exit devices. Non-certified hardware immediately voids the door's fire rating, creating serious code violations and life-safety risks.

D&D HARDWARE is an ISO9001 certified manufacturer with 18 years of specialized experience in producing fire-rated door hardware. We provide a complete suite of UL 10C fire-rated and ANSI/BHMA certified hardware solutions, enabling hollow metal door manufacturers to source all critical components from a single, trusted partner.

Why Is UL 10C Certification Critical for Hollow Metal Door Hardware?

UL 10C (Positive Pressure Fire Tests of Door Assemblies) is the North American standard that evaluates how fire door assemblies perform under realistic fire conditions. Unlike older neutral-pressure tests, UL 10C subjects the door assembly to positive pressure — simulating the actual pressure differential that occurs during a building fire, where heated air pushes outward through any gaps in the door assembly.

This positive pressure testing is significantly more demanding than neutral-pressure methods. It reveals weaknesses in hardware that might otherwise go undetected — hinges that warp, locks that disengage, or closers that fail to maintain the door in a fully closed position. Hardware that passes UL 10C testing has demonstrated its ability to maintain the door assembly's integrity under the most realistic and severe fire conditions.

Critical Compliance Requirement: Under NFPA 80 (Standard for Fire Doors and Other Opening Protectives), all hardware installed on a fire-rated door must be listed and labeled for fire protection service. Installing non-UL-listed hardware on a UL-certified door voids the entire assembly's fire rating.

What Are the Specifications of D&D UL Series Hardware?

The D&D UL Series is engineered specifically for commercial and industrial hollow metal doors in North American markets. Every product carries its own UL file number, providing full traceability and independent verification through the UL Product iQ database. The following details our complete UL-certified hardware range:

Picture	Product	UL Standard	Fire Rated	UL File Number	Additional Certification
	Door Hinge	UL/cUL UL 10C	3 Hours	R38013	ANSI/BHMA Grade 1 & Grade 2
	Door Lock	UL 10C	3 Hours	R40901	—
	Door Closer	UL 10C	3 Hours	R40717	—
	Fire Exit Hardware	UL 10C	3 Hours	R40486	—
	Panic Hardware	UL305	—	SA45817	—

What Is the Difference Between UL 10C and UL305 Certification?

UL 10C (Positive Pressure Fire Tests of Door Assemblies) evaluates the fire resistance of hardware when installed on a fire-rated door assembly. Products certified to UL 10C have demonstrated their ability to maintain the door's fire integrity for a specified duration — in the case of D&D hardware, up to 3 hours. This certification is essential for hinges, locks, closers, and fire exit devices installed on fire-rated hollow metal doors.

UL305 (Panic Hardware) specifically addresses the mechanical performance and safety requirements of panic hardware devices. It evaluates the device's ability to release the door latch when force is applied to the crossbar or touchpad, ensuring reliable emergency egress. D&D's panic hardware (File No. SA45817) meets this standard, providing building occupants with dependable emergency exit capability.

Why Does ANSI/BHMA Grade Matter for Commercial Door Hardware?

The American National Standards Institute (ANSI) and the Builders Hardware Manufacturers Association (BHMA) jointly establish the performance standards for commercial door hardware in North America. These standards define three grades of performance, with Grade 1 representing the highest level of durability, strength, and security — designed for heavy-duty commercial and institutional applications.

D&D door hinges carry both ANSI/BHMA Grade 1 and Grade 2 certifications, meaning they have been independently tested and verified to meet the most demanding performance requirements. Grade 1 hinges are specified for high-traffic environments such as hospitals, schools, government buildings, and commercial offices where doors may be opened and closed thousands of times per day.