what is hold open force?

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Hold Open Closers & Magnets (Fire/Life safety products) provide a wide range of solutions.  Single or multi-point hold open closers Utilize an electromechanical closer. Hold the door o...
The SEM series magnets have a holding force of approximately 35 lbs when installed according to LCN instructions.
The 5 pound force requirement is in reference to the maximum force to swing the door, not the maximum force allowed to unlatch the exit device.  Maximum allowed force to retract the Von D...
The Senior Swing Series used to have a 2 gearbox options, a "standard force" (15 lbs) and a "RF - reduced force" (11 lbs). In November 2009 RF option was eliminated and we made the standard gearbox...
The manual opening force on a 4630/4640 will be approximately 8.5 lbs to 14 lbs depending on the spring setting.
The older model Senior Swing came with 2 spring options. The "standard force" spring required 15 lbs of manual  opening force, and reduced force "RF" required 11 lbs of manual opening force.  All S...