UL 10C and UL 10B are two distinct fire-test standards for door assemblies used in the United States. UL 10C applies to positive pressure fire door assemblies, while UL 10B applies to neutral pressure conditions. For most modern commercial buildings, UL 10C is the required standard—and the locks ins

UL 10C is an American standard for positive pressure fire tests of door assemblies, including the locks installed within them. A UL 10C certified door lock has been independently verified to maintain its structural and functional integrity under realistic fire conditions — including the pressurized

D&D Hardware tests every door hinge to ANSI/BHMA standards through a multi-stage quality control process — covering raw material inspection, dimensional verification, mechanical cycle testing, and fire-rating validation. This article explains exactly how that process works, and why it matters when s

From Raw Material to Finished Hinge: How D&D Hardware Ensures BHMA ComplianceWhen specifying door hardware for commercial buildings, architects, facility managers, and contractors face a critical question: Will this hardware perform reliably under years of heavy use?BHMA certification provides the a

Hotel door hardware must deliver three things simultaneously: near-silent operation that protects guest sleep, fire-rated safety that meets international building codes, and designer aesthetics that reinforce the property's brand identity. D&D Hardware is a certified BHMA door hardware manufacturer

BHMA-certified door hinges are the benchmark standard for educational buildings, combining high cycle-count durability, fire-rated performance, and code compliance. For schools and universities handling thousands of door operations daily, BHMA Grade 1 hinges—manufactured to ANSI/BHMA A156.1 s

The right door hinge for healthcare facilities is corrosion-resistant (typically grade 304 or 316 stainless steel), easy to sanitize, and certified for fire safety with a UL 10C door hinge rating. These hinges support infection control, patient accessibility, and code compliance across

The top trends for BHMA door hinges in 2026 and 2027 include the rapid adoption of corrosion-resistant PVD coatings, standardizing 3D concealed designs in commercial projects, integrating smart sensor modules, scaling up fire-rated hardware for ultra-large doors, and transitioning to eco-frie

ANSI/BHMA door hinge grades classify hinges by durability, load capacity, and cycle life. Grade 1 is engineered for heavy-duty commercial and institutional use, Grade 2 suits light commercial and high-traffic residential doors, and Grade 3 is designed for standard residential applicati

Meta dataMeta titleHow to Adjust a UL Door Closer for Optimal SafetyMeta descriptionLearn how to adjust your UL door closer correctly. Follow our simple step-by-step instructions to ensure your fire-rated doors close safely and securely.How to Adjust a UL Door Closer for Optimal SafetyA heavy commer