Glynn Johnson 100 Series Concealed

the Glynn Johnson 100 Series Is

The Glynn Johnson 100 Series is an extra heavy-duty concealed overhead door stop and holder - the product category specified when a floor stop would create a tripping hazard, a wall stop would damage the wall or isn't in the door swing path, or the application requires no visible hardware on the door face or frame. The arm track mortises into the top of the door and the jamb bracket mounts in the frame head. When the door opens, the arm engages inside the channel - no exposed hardware, no visible arm on the door face, no wall-mounted stop in the path of traffic.

The 100 Series is rated extra heavy duty and is the correct specification for entrance doors, vestibule doors, large and heavy doors, high-traffic institutional corridors, and any door subject to significant abuse. It works on virtually all door types - hollow metal and wood doors mounted on conventional butt hinges, pivots, continuous hinges, swing-clear hinges, and most specialty hinge types. Compatible with surface-applied door closers, which is the typical specification on entrance and vestibule openings.

How to Select the Right Size: 102 Through 106

The number after "100" determines the arm length, which must match the door width. Ordering the wrong size produces an arm that either won't engage the channel correctly or doesn't reach far enough to control the door.

102 - doors 23-1/16" to 27" wide. Narrow interior doors and some residential applications.

103 - doors 27-1/16" to 33" wide. Standard narrow commercial interior doors.

104 - doors 33-1/16" to 39" wide. This is the size for a standard 3'0" (36") commercial interior door. The most commonly ordered size in institutional and commercial projects.

105 - doors 39-1/16" to 45" wide. Wide commercial doors, some entrance applications.

106 - doors 45-1/16" to 51" wide. Extra wide entrance and vestibule doors.

Measure the door width first. The door leaf width determines the size - not the opening width.

100S, 100H, and 100F: What the Suffix Means

The letter suffix after the size number determines the function. This is the most important selection decision after sizing.

100S - Stop Only. The arm engages at the preset stop angle and prevents the door from swinging further. No hold-open mechanism. The door can be pushed back from the stop without releasing anything. This is the correct specification when a hold-open function isn't needed, or when the door must not be held open. The 100S is UL listed as a miscellaneous fire door accessory and can be used on fire-rated door assemblies of any rating without affecting the fire door classification.

100H - Hold-Open. The same stop function as the 100S, plus a spring-loaded hold-open mechanism. When the door is pushed to the stop angle, the hold-open engages and holds the door open. To release, push the door back past the engagement point. The 100H is the standard specification on entrance and vestibule doors used with surface-mounted closers, where the door needs to be held open during active traffic and close when released. The hold-open (H) version cannot be used on fire doors without an electromagnetic release connected to the building's fire alarm system.

100F - Friction Hold-Open. The friction model holds the door at any position in its travel range, not just at the maximum stop angle. The friction tension is adjustable in the field using an allen wrench and open-end wrench at the slider on top of the channel. This is the specification for patient room doors, therapy room doors, closet doors, and any application where the door needs to be held at different positions depending on the situation - fully open, partially open, or at any intermediate angle.

Stop Angle: Field Adjustable from 85° to 110°

Every 100 Series unit ships with installation templates that allow the stop angle to be set in the field at installation. The range is 85 degrees to 110 degrees of door opening. The template position determines the final stop angle - set it at installation and the arm engages at that angle consistently. This field-adjustability means one part number works across door openings with different clearance constraints.

Glynn Johnson 100 Series on Fire Doors

The 100S (stop-only) models are UL listed for use on hollow metal and wood fire doors of any rating without adversely affecting the fire door assembly's listing. The hold-open models (100H, 100F, and 100HP) cannot be specified on fire doors unless the hold-open is connected to electromagnetic release triggered by the building's fire alarm - when the alarm activates, the hold releases and the door closer brings the door to closed and latched. Without that integration, a hold-open device on a fire door is a code violation.