Materials and Finishes:

Glynn-Johnson 70 series models are constructed primarily of Brass and 300 series Stainless Steel substrates, with several components fabricated of Steel treated to resist corrosion. Models in the 70 series utilize a 1/2"-diameter stainless steel bar.

The bar is always provided in US32D. The spring, washer and nut are provided in a clear zinc finish. 

Models:

Glynn-Johnson 70 series holders and stops offer rugged durability and ease of installation. The surface-applied door and jamb brackets provide reliable door control, yet require minimal door and frame preparation. Glynn-Johnson 70 series Hold-Open and Stop-Only models provide heavy-duty door protection. 

70H Series Hold-Open Models:

(Suffix H) Hold-Open models in both series provide a selective Hold-Open function with easy-to-adjust tension. A simple 90º rotation of the roller mechanism disables the Hold-Open function, allowing the unit to serve as a shock-absorbing stop. The Hold- Open function provides a convenient method of holding the door open at a predetermined position for short or long periods of time, permitting an unobstructed traffic flow through the opening.

Both series provide a durable Hold-Open mechanism that can be turned off, allowing the unit to function as a shock-absorbing stop. The Hold-Open tension is simply adjusted incrementally for increased or decreased holding power by turning the nut at the end of the bar. While both series are designed for demanding applications, the 79 Series is recommended for extremely heavy or wide doors subject to violent or abusive conditions.

Application Information

UL Classification:

The 70 Series Stop-Only models are classified by Underwriters Laboratories (UL) as Miscellaneous Fire Door Accessories. This classification applies to use on either Hollow Metal Fire Doors or Wood Fire doors. These units may be used on doors of any rating. As a reminder, the Miscellaneous fire door Accessories (GVUX) Section is defined by UL as: “Miscellaneous fire door accessories are intended for installation with classified fire doors and/or listed fire door frame as identified in the individual listings. The accessories have been investigated to determine that when installed in accordance with the manufacturer’s instructions, the accessories do not adversely affect the fire rating at the fire door and/or fire door frame.”

Dead-Stop Templating:

Dead-Stop Templating is recommended for applications where a wall or similar obstruction is placed at an opening angle of 110º or less (i.e., doors that open back-to-back). Dead-Stop Templating can be applied to Hold-Open and Stop-Only models. The Dead-Stop position is the point at which the shock-absorbing spring is fully compressed. Therefore, when Dead-Stop Templating is used, the initial degree of opening will be 5º to 7º less than the Dead-Stop opening.

Example: If the holder is templated to a 100º dead stop, the door will hold open

at an angle between 93º and 95º but no further than 100º.

Mounting:

Surface mounted overhead door holder installation does not require mortising of jamb or door. The jamb bracket is surface mounted on the stop of the frame. The channel is also surface mounted on the face of the door. Hollow metal doors and jambs must be reinforced to provide necessary strength for the holder specified. Strength of wood doors and jambs must also be adequate for the holder. A typical surface mounted installation is shown in Figure 1 where jamb bracket is fastened to the stop. Angle jamb brackets are available for hinge side mounting (Figure 2) and for use with rabbeted doors or flush transom installations (Figure 3). Jamb brackets with special shims for use on jambs with blade stops are also available (Figure 4). Advise stop height and the appropriate shim kit will be provided.

Options

Suffix J (Angle Jamb Bracket):

An angle jamb bracket is available to convert standard models to hinge-side or flush transom mounting If ordered with unit add suffix J. If needed separately, order either 70J or 79J by finish needed.

Suffix SB (Sex Bolt Mounting):

A package of 2 sex bolts provided with the 70 Series.

Suffix SOC (Pin-in-Socket Security Screw):

A screw package with pin-in-socket screw for mounting both the door bracket and jamb bracket is provided instead of the standard screw package.