David Bolton Door Pull CTC: Why the Center-to-Center Dimension Is the First Decision on Any Pull Hardware Schedule What CTC Means on a Door Pull -- and Why It Drives Everything Else This article is for contractors, facility managers, and architects who need to specify or order door pulls without sending the projec... ADA hardware architectural hardware commercial door trim door pulls hardware specification Sep 4, 2026 Our Blog
David Bolton Square Barrel vs. Round Barrel Hinges: When the Barrel Style Is an Architectural Decision, Not a Catalog Default Why the Barrel Shape on a Full Mortise Hinge Deserves a Line in the Spec Most commercial door hardware schedules call out hinge size, weight, material, and finish — and stop there. The barrel style (s... architectural hardware decorative hardware hardware specification hinges stainless steel hinges Aug 29, 2026 Our Blog
David Bolton No Knuckles, No Gaps: How Concealed Hinges Work on Flush Wood Doors What This Article Covers Concealed hinges -- sometimes called invisible hinges or European-style hinges -- are fully mortised into both the door edge and the frame so that no knuckle, barrel, or pin i... architectural hardware concealed hinges door specification flush wood doors invisible hinges Aug 11, 2026 Our Blog
David Bolton Sourcing Door Hardware for Historic Restoration: Period Accuracy, Modern Code, and What to Specify What This Guide Covers and Who It Helps Historic restoration projects sit at a difficult intersection: the owner wants hardware that looks like it belongs to the building's original era, the architect... architectural hardware historic restoration mortise locks period door hardware reproduction hardware Jul 20, 2026 Our Blog
David Bolton The 3-Knuckle Concealed Bearing Hinge: When Streamlined Appearance and Commercial-Grade Performance Have to Coexist What This Guide Covers When a door schedule calls out a 3-knuckle concealed bearing hinge, two questions usually follow: Does the reduced knuckle count change anything structurally? And why does a spe... NRP hinges architectural hardware commercial hinges concealed bearing hinge specification Apr 23, 2026 Our Blog