David Bolton The Concealed Offset Panic Threshold: What Specifiers Get Wrong Before the Floor Goes Down What This Article Covers and Who It Helps This guide explains how panic thresholds with a concealed offset work, why they are misspecified more often than almost any other threshold type, and what spe... commercial door hardware egress compliance exit devices panic hardware thresholds Aug 1, 2026
David Bolton Exit Device Prep on Hollow Metal Doors: What Gets Cut Wrong Before the Device Ever Ships Why Door Prep Is the Decision That Happens First -- and Hurts Last This article is for commercial subcontractors, door and hardware suppliers, and facility project managers who specify or install exit... door prep exit devices fire door compliance hollow metal doors panic hardware Jul 26, 2026
David Bolton Electrified Exit Device Trim: How the Outside Lever Controls Ingress Without Blocking Egress What This Article Covers and Who It Helps Electrified exit device trim is the outside lever, handle, or pull mounted on the secure side of a panic bar that is controlled by an access system rather tha... access control electrified hardware exit devices fire-rated door hardware panic hardware Jul 24, 2026
David Bolton Panic Hardware in Assembly Occupancies: What the Occupant Load Threshold Actually Triggers What This Article Covers and Who It Helps If you are specifying, bidding, or inspecting door hardware in a theater, arena, conference center, house of worship, banquet hall, or any other assembly-use ... assembly occupancy code compliance exit devices life safety panic hardware Jul 13, 2026
David Bolton Mortise Exit Devices vs Rim Exit Devices: Choosing the Right Panic Hardware for the Opening What This Article Covers -- and Who It Helps When a hardware schedule calls for panic hardware, one of the first decisions is whether to use a rim exit device or a mortise exit device . The choice aff... commercial door hardware exit devices fire exit hardware mortise hardware panic hardware Jul 12, 2026
David Bolton The SVR Top Strike Alignment Problem: Why the Top Latch Misses After the Frame Is Already Set Why the Top Strike Is the Most Mislocated Component on a Surface Vertical Rod Exit Device This article is for commercial contractors, facility maintenance crews, and hardware coordinators dealing with... door hardware exit devices installation panic hardware surface vertical rod Jul 7, 2026
David Bolton Wide-Stile vs Narrow-Stile Exit Devices: Choosing the Right Panic Hardware for Your Door Why Door Stile Width Determines Your Exit Device Before Almost Anything Else This article explains the practical difference between wide-stile and narrow-stile exit devices, who needs to care about th... aluminum storefront doors exit devices hardware specification life safety panic hardware Jul 3, 2026
David Bolton Dummy Trim vs Night Latch Trim on Exit Devices: Picking the Right Outside Function Before the Door Gets Prepped Why the Outside Trim Function Gets Chosen Last and Causes Problems First This article explains the practical difference between dummy trim and night latch trim on exit devices, who each function is ri... egress exit devices hardware schedules outside trim panic hardware Jun 27, 2026
David Bolton Cylinder Dogging on Exit Devices: Why the Upgrade Gets Ordered Wrong Before Anyone Checks the Fire Rating What Cylinder Dogging Actually Does on a Panic Bar Cylinder dogging is a feature that lets a building operator use a standard key cylinder to hold an exit device's latch bolt in the retracted position... cylinder dogging exit devices fire-rated openings panic hardware retrofit hardware Jun 27, 2026
David Bolton The Rim Strike on a Mullion-Free Door Pair: Why the Meeting Stile Clearance Gets Ignored Until the Panic Hardware Binds Why the Rim Strike on a Mullion-Free Pair Is Not an Afterthought This article is for commercial contractors, facility managers, and architects who are specifying or installing rim exit devices on pair... door pairs exit devices life safety panic hardware rim strike Jun 26, 2026
David Bolton Panic Hardware on Stairwell Doors: Why the Dogging Function Gets Specified Wrong Before the Fire Marshal Reviews the Egress Plan The Short Answer That Saves You a Failed Inspection This article explains why the dogging function on panic hardware gets specified incorrectly on stairwell doors, who gets caught by that mistake, and... code compliance exit devices fire exit hardware panic hardware stairwell doors Jun 14, 2026
David Bolton Switching an SVR Exit Device from a Dogged Opening to a Latching One: What Changes at the Strike, Rod, and Frame Why This Conversion Happens More Than It Should Surface vertical rod (SVR) exit devices get dogged open on non-rated openings all the time. A school corridor pair, a retail stockroom egress, a warehou... SVR exit devices commercial door hardware exit device maintenance life safety hardware panic hardware Apr 23, 2026