what hardware can I use on double doors,

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Panic devices are not design for exterior application. As with any mechanical device, exposure to the elements may affect the operation and life of the device and/or finish and may void&nbs...
Water and electricity do not mix.  Von Duprin electrified devices can NOT be used in an exterior environment.
The overhead concealed operators (2850/2860) will not work on a Double Egress frame because the doors are not in the same plane. You will have to use the surface mount (9553 / 9563) on Double Egres...
The Von Duprin 1609 cannot be used on a pair of fire rated doors. We recommend using the Von Duprin fire rated mortise exit device in lieu of the rim device such as the Von Duprin 5575-F, 8875-F or...