Introduction: Fire Testing Is a Stress Test for Door HardwareIn fire-resisting door assemblies, hinges and locks are not passive components. During an EN 1634-1 fire resistance test, these components are subjected to extreme thermal, mechanical, and structural stresses that go far beyond normal serv

When you pick fire rated door hardware for multi-family units, choose products that are certified. Look for safety features like self-closing and positive latching. These features help keep doors safe in emergencies. Pick strong materials that do not rust or wear out fast. Make sure the hardware fit

You want your school to be safe and follow rules. Certified fire rated door hardware helps keep students and staff safe. It slows down fire and smoke from spreading. These doors have special seals and materials. They block fire and smoke for a certain time. This gives people more time to leave the b

Introduction: Fire-Rated Hardware Is Applied Engineering, Not Just ComplianceIn a fire-rated door assembly, door hardware is part of the fire protection system, not a secondary accessory. Hinges, locks, closers, panic devices, and handles must perform under extreme heat, structural deformation, pres

Introduction: Cycle Testing Is a Measure of Real Service LifeIn professional door hardware specification, cycle testing is one of the most misunderstood performance indicators. While many products are labeled “heavy duty,” only standardized cycle testing can objectively demonstrate how long hardware

You need the correct door closer size for your door to ensure safety and smooth operation. Choosing the right size depends on your door’s width and weight, aswell as whether it’s for commercial or residential use. It’s important to consider regulations such as ADA opening force requirements and ANSI

Introduction: Why Fire Test Standards Are Not InterchangeableFire-rated door assemblies are regulated by different fire test philosophies in Europe and North America. While both aim to protect life and property, EN 1634-1 and UL 10C are not equivalent standards and cannot be used interchangeably.For

Introduction: Why Certification Choice Matters in Door HardwareIn the global door hardware industry, certification is not optional — it is a regulatory and engineering requirement. However, many project teams still ask the same question:Do we need CE, UL, or ANSI/BHMA certification?The answer depends on market location, building codes, fire safety requirements, and project type. Each certification system serves a different purpose, and misunderstanding their roles can lead to project rejection, inspection failure, or legal risk.

Introduction: Why EN 1935 Is the Core Standard for Hinges in EuropeIn European and CE-regulated markets, EN 1935 is the definitive performance standard for single-axis door hinges used on both fire-rated and non-fire-rated doors. Unlike generic product specifications, EN 1935 provides a quantified,

UL 10C Fire Test Explained: How Door Hardware Must Perform in Fire-Rated AssembliesIntroduction: Why UL 10C Matters for Fire Door HardwareIn fire-rated door assemblies, door hardware is not an accessory — it is a life-safety component. Hinges, locks, closers, and exit devices must continue to functi

Order heavy-duty hardware for new metal door installations by selecting products that adhere to safety regulations. You need certified door hardware to ensure your building's security and maintain the strength of your door over time. D&D Hardware offers options specifically designed for metal doors,

You want the best hinge for heavy doors, but your choice depends on the door’s weight, what it’s made of, and how often people use it. Picking the right hinge means your doors stay safe, last longer, and meet building standards. If you use the wrong hinge, you could face costly repairs and endless m

Fire safety stands as a paramount concern in any type of building, be it residential, commercial, educational, or industrial. Among the array of fire protection systems, fire doors are of crucial importance, as they significantly slow down the dissemination of flames and smoke, safeguard escape rout

A mortise lock is one of the oldest, strongest, and most reliable locking mechanisms used in modern architecture. Its structure is embedded inside a rectangular pocket cut into the door edge—known as the mortise—which provides deeper installation, thicker materials, and stronger mechanical performan