I have an uneven pair of doors, 3'-0" and 18" at the egress corridor for a commercial building with a magnetic hold open device tied to the building fire alarm system. What type of hardware do we need? Also, the 18" leaf does not provide the required clearance for egress. Can we not have any exit device on the smaller leaf? In case of a fire, the doors get closed, but only the 3'-0" door stays active for egress. Is that acceptable? If yes, then what type of hardware do we need?
There are several possible right answers, but the test of any answer is whether your local fire marshal or building inspector agrees with it. Sight unseen, I'd say this is a fire rated opening, so ideally I would suggest fire rated constant latching flush bolts for the inactive leaf and a fire rated mortise exit device with an open back strike for the active leaf. But since it seems these are existing doors, they must have some kind of hardware on them now, and the choice of hardware is often determined by what is already there.
Updated on May 15, 2018
By Tom Rubenoff