what is positive latching

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  Power Boost is a positive latching feature that increases the latch force, to over come building stack pressure or door weather stripping, etc, if the door stops before co...
The Von Duprin Guard-X exit device is not fire rated because the deadbolt is not spring loaded. Therefore, there would be no positive latching as required on a fire rated opening. 
Panic Hardware and Fire Exit Hardware are two different types of exit devices, and the proper selection is determined by code requirements. Panic Hardware is an exit device which is tested for u...
The most obvious difference (in the device) is the lack of mechanical dogging on a Fire Rated Device.  There are some internal parts that may be different and the method it is secured to the d...
The wires on 6000 series electric strike solenoid are non polarized.
There are a number of reasons the Von Duprin 55 or 88 series cross bar may not operate properly: The hinge case spring lifts both lever arms and the crossbar. To check spring, pu...
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