I would love some input on this question, because I know that many of you have experience with this issue.  Typically, flush bolts with extension rods are listed for use on pairs of hollow metal fire doors.  For wood fire doors, “corner wrap” flush bolts are tested and listed.

With most of the flush bolts listed for use on a wood fire door, the door prep removes a larger portion of the door, which may result in damage to the door over time.  For example, if a wood fire door is latched with the corner wrap flush bolts and a cart hits the door, the force may cause the bolt to break through the veneer on the face of the door.

How do you handle this application?  What type of flush bolts do you prefer for wood fire doors?  WWYD?

The extension rod flush bolts shown on the left are typically listed for use on hollow metal fire doors, while the the corner wrap flush bolts on the right are listed for wood fire doors.

BTW…while I was googling about this topic, I found a video from Rich Howard and his daughter, Anna, of Architectural Builders Supply, all about flush bolts and coordinators.  Very cool!

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