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.

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

In architectural hardware procurement, door hinges are often considered a minor component. However, industry experts and professional buyers understand that hinges are one of the core components of a door, directly impacting its service life, safety performance, and overall quality. Especially for i

IntroductionIn the world of commercial buildings and facility management, life safety is a top priority. Fire doors play a vital role in isolating fire and smoke, allowing time for safe evacuation and emergency response. However, the reliability of even the strongest fire doors depends on the hardwa

As a leading hardware manufacturer, we specialize in a comprehensive range of door hardware products, certified to meet global quality and safety standards. Our portfolio includes door hinges, door locks, smart locks, door closers, panic exit devices, concealed hinges, handles, lock cylinders, glass

As a door hardware company, D&D understands the importance of safety when it comes to protecting your property and loved ones. That is why we are proud to offer UL fire bars as a reliable solution for fire-rated doors. In this article, we will introduce you to UL certification, fire-rated doors, and

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Some items of building hardware are essential to ensure that the fire-resisting door stays closed in its frame in a fire emergency.

The surface vertical rod exit device mounts to the surface of the door. A top and a bottom rod extend the full height of the door and are attached to latch-bolt assemblies. The top latch-bolt assembly engages a strike that can be either surface-applied or mortised into the soffit of the frame. The bottom latch-bolt assembly can latch into a surface-applied or mortise strike in the floor. A latch-track threshold can also serve as a strike to secure the bottom latch-bolt assembly. Similar to rim exit devices, the operating trim extends through the door thickness and engages the lock case of the exit device.
The clearance between the door bottom and the finished floor is an important dimension that needs to be addressed. Depending on the design of the latch-bolt assembly and the strike, the doors may have to be ordered with a non-standard undercut to ensure the latch-bolt can properly engage the strike.