From a limited product range to a specification-ready architectural hardware portfolio with D&D HardwareD&D Hardware — Global Standards, Factory DirectExecutive answer: D&D helped the distributor consolidate certified product sourcing, private-label branding, technical documentation, packaging and h
READ MOREDo local building codes require UL listed mortise locks? Yes, official safety standards like NFPA 80 and the IBC state that you must use them. You need to pick the right fire rated mortise lock to keep people safe. First, make sure the lock passes the UL10C positive pressure fire test. Next, match t
READ MOREA UL Listed mortise lock offers tested fire protection for up to three hours. It meets strict safety rules to keep people safe. In contrast, a standard mortise lock provides basic security for normal doors without any official fire-rating safety approval.Architects, building managers, and builders m
READ MORETECHNICAL REFERENCE — COMMERCIAL FIRE DOOR HARDWAREFire Exit Hardware: What It Is, When It's Required, and How to Specify It CorrectlyA specification and procurement reference for architects, contractors, door manufacturers, and commercial hardware distributors.On a commercial project, an exit door
READ MOREIf you are preparing a fire door test, project submittal, or multi-category hardware order, send D&D Hardware your door schedule, required standards, product list, and target delivery date. Our team can help review the scope, recommend suitable certified options, organize technical documents, and coordinate consolidated supply.
READ MOREA 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.
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