David Bolton Full Mortise Hinges on Heavy Commercial Doors: Reading the Field Conditions That Drive the Upgrade Why the Standard Hinge Spec Sometimes Falls Short in the Field This guide is for commercial contractors, facility managers, and hardware specifiers who need to evaluate whether a standard hinge specif... commercial door hinges full mortise hinges heavy weight ball bearing hinges hinge specification hollow metal door hardware Apr 23, 2026
David Bolton Specifying Flush Bolts for Inactive Leaves: A Practical Guide for Metal Door Openings Why Flush Bolts Matter on Inactive Door Leaves On a pair of commercial doors, the inactive leaf -- the one that typically stays closed -- needs its own latching solution. That solution is almost alway... door pair hardware fire door compliance flush bolts hollow metal door hardware inactive leaf hardware Apr 22, 2026