David Bolton When to Step Up to a 5x4-1/2 Heavy Weight Hinge: Door Weight, Width, and Frequency Explained The Right Hinge Grade Is Not Always Obvious at Bid Time This guide is for contractors, facility managers, and architects who need to know exactly when a standard-weight 4-1/2 x 4-1/2 hinge is no longe... commercial door hardware door specification heavy weight hinges hinges stainless steel hinges Apr 23, 2026 Our Blog
David Bolton How to Specify Door Perimeter Weatherstrip: A Practical Guide for Commercial Projects Getting Door Perimeter Seals Right the First Time Perimeter weatherstrip is one of the most overlooked line items in a commercial hardware specification, yet it directly affects energy performance, oc... commercial door hardware door perimeter seal door specification gasketing weatherstrip Apr 22, 2026 Our Blog
