A fire door closer is not simply a device that moves a door toward the frame. It must generate enough controlled closing moment to move the leaf through its full arc, overcome hinge friction, air-pressure differences and seal resistance, and finally provide enough latching action for the latchbolt t
READ MORESurface vs. Concealed Door Closers for Commercial Fire DoorsA UL Listed Fire Rated Commercial Door Hardware Selection GuideFor a commercial fire door, the closer is not simply a convenience device. It must return the door to the closed position so the opening can perform as intended when fire protec
READ MOREThis article explains how NFPA 80 requirements apply to fire door assemblies in commercial buildings, covering design coordination, listed components, installation, operation, inspection and ongoing maintenance. It also helps architects, contractors, procurement teams and facility managers understand their responsibilities when specifying and maintaining fire doors and compatible listed hardware throughout the building lifecycle.
READ MOREPlanning a branded commercial door hardware range for steel doors? Send D&D Hardware your door types, target standards, product categories, functions, finishes, estimated quantities, and branding requirements. Our team can help organize the selection and sample-review process before mass production.
READ MOREThe general term for metal and non-metal products and accessories installed in buildings or structures. Generally, the utility model has double effects of utility and decoration. Door hardware refers to all kinds of metal and non-metal accessories installed on the building door. There are building lock, handle, support, hinge, door closer, handle, bolt, anti-theft chain, door closing device, etc.
READ MOREDoor hinges play an important role in door, making the door open or close easily. When you buy the hinges, maybe you have trouble in installing the door hinge. Now, there has easy way to let you know how to install door hinges.
READ MOREA door closer prevents damage caused when doors open or close too fast. The device causes doors to close slowly, eliminating the issues associated with slamming doors. Unlike commercial door closers, residential door closers are available in a variety of colors and styles. Installing a door closer is an easy process that requires following a few straightforward steps.
READ MOREThere are many kinds of door handles. They will have different matching effects when combined with different door panels. Some door handles are matched when choosing the door, but if you want to choose the door handle yourself, you need to match the handle with the door panel, and consider the position of the door.
READ MORE
English 
