The Glynn Johnson 100 Series Overhead Door Holder and Stop is a concealed overhead door control solution designed for heavy-duty applications. It is commonly used in commercial, institutional, and industrial settings where doors are subject to frequent use, heavy traffic, and demanding environmental conditions. This article provides an overview of the product's features, applications, materials, and functions, along with considerations for selecting the appropriate model for a given use case. The information is based entirely on the provided source material, which includes technical descriptions and specifications from the manufacturer’s documentation.
Overview of the Glynn Johnson 100 Series
The Glynn Johnson 100 Series is a line of overhead door holders and stops engineered to offer reliable and versatile control for doors in high-traffic and heavy-use environments. These devices are concealed, which means they are installed in the overhead area of the door and not visible from the front or back. This design allows for a clean aesthetic while providing robust functionality.
The 100 Series is particularly well-suited for entrance doors, vestibule doors, and frequently used interior doors. It is designed to complement surface-applied door closers, offering an effective method of door control that minimizes wear and tear on the door, frame, hinges, and surrounding structures. The product is manufactured in either heavy gauge brass or 300 stainless steel, materials chosen for their durability and resistance to corrosion.
Materials and Finishes
The Glynn Johnson 100 Series is available in two primary construction materials: heavy gauge brass and 300 stainless steel. Both materials are known for their strength and longevity, making them ideal for environments where the door is subjected to frequent use or exposure to harsh conditions.
The range of finishes available for the 100 Series is extensive, including the following options:
- US3
- US4
- US10
- US10B
- US32
- US32D
- SP4
- SP10
- SP28
- SP313
- SPBLK
These finishes are designed to complement a wide variety of architectural styles and interior design schemes. The availability of black (SPBLK) and other color options allows for greater flexibility in matching the door hardware to the overall design of the building.
Applications
The Glynn Johnson 100 Series is designed for use on a variety of door types, including those mounted on conventional butt hinges, pivots, continuous hinges, and swing clear hinges. It can also be adapted for use with a range of specialty hinges. This versatility makes the 100 Series suitable for a wide range of applications, including but not limited to:
- Entrance doors
- Vestibule doors
- High-traffic interior doors
- Doors in institutional settings such as hospitals, schools, and government buildings
When used in conjunction with surface-applied door closers, the 100 Series provides an effective method of controlling door movement. This is particularly important in environments where doors are subject to frequent use or where maintaining a controlled flow of traffic is essential.
Functional Options
The Glynn Johnson 100 Series offers several functional options to meet the specific needs of different applications. These options include:
Hold-Open Function: This feature allows the door to be held open at a predetermined position for short or long periods. It facilitates unobstructed traffic flow and can be adjusted using an Allen wrench through the end of the slider located in the channel mounted on the top of the door. The automatic hold-open mechanism is activated when the door is opened to a preset angle.
Friction Hold-Open Function: Similar to the standard hold-open feature, the friction hold-open allows the door to remain open at a specific position. However, it provides additional resistance to prevent the door from closing prematurely due to external forces such as wind or sudden movement.
Internal Hold-Open Function: This version of the hold-open feature is activated from within the mechanism, ensuring that the door remains open without requiring manual adjustment. It is ideal for environments where the door needs to remain open for extended periods without constant user intervention.
Stop-Only Function: This option does not include a hold-open feature and is designed for situations where the door does not need to be held open. It provides shock-absorbing capability and is suitable for use on fire doors and other applications where the hold-open function is not required.
The ability to choose from these different functional options allows installers and building owners to select the most appropriate model for their specific needs. For example, the stop-only function is ideal for exterior doors that are subject to wind or for doors in high-traffic areas where the hold-open feature is not necessary.
Installation Considerations
The installation of the Glynn Johnson 100 Series requires careful planning and attention to detail. Since the device is concealed, it must be installed in the overhead area of the door, which may require modifications to the door frame or overhead structure. The manufacturer recommends that installation be performed by a qualified professional to ensure proper fit, function, and compliance with relevant building codes and standards.
One important consideration is the type of door closer being used in conjunction with the 100 Series. The device is designed to work with most surface-applied door closers, but it is essential to verify compatibility before installation. In some cases, adjustments to the door closer may be necessary to ensure optimal performance.
Another important factor is the condition of the door and its surrounding structure. Doors that are subject to heavy use or frequent traffic may require additional reinforcement to support the weight and movement of the door. In such cases, the 100 Series can help reduce wear and tear on the door, frame, and hinges by providing controlled movement and minimizing stress on the door components.
Heavy-Duty vs. Light-Duty Applications
The Glynn Johnson 100 Series is designed for heavy-duty applications, but the manufacturer also offers a lighter-duty option for doors that are subject to normal activity. The 100 Series is recommended for doors that are used frequently or in high-traffic environments. For doors that experience less frequent use or are not subject to the same level of wear and tear, the lighter-duty option may be more appropriate.
It is important to note that the 100 Series is not recommended for use on exterior doors that are subject to strong wind or for doors that are used in environments with extreme temperature fluctuations. In such cases, a heavy-duty holder or stop should be considered. The manufacturer also recommends that users consult with a qualified professional to determine the most suitable option for their specific application.
Conclusion
The Glynn Johnson 100 Series Overhead Door Holder and Stop is a versatile and durable solution for controlling door movement in heavy-duty applications. Its concealed design, wide range of finishes, and functional options make it an ideal choice for a variety of commercial, institutional, and industrial settings. The product is manufactured in either heavy gauge brass or 300 stainless steel, ensuring durability and resistance to corrosion. The availability of different functional options allows installers and building owners to select the most appropriate model for their specific needs. Whether used in conjunction with surface-applied door closers or as a standalone door control solution, the 100 Series provides reliable performance and long-term value.