Where a pair of doors serves a Group B, F or S occupancy, manually operated edge- or surface- mounted bolts are permitted on the inactive leaf provided such inactive leaf is not needed to meet egress width requirements and the building is equipped throughout with an automatic sprinkler system in accordance with Section Where a pair of doors serves patient care rooms in Group I-2 occupancies, self-latching edge or surface-mounted bolts are permitted on the inactive leaf provided that the inactive leaf is not needed to meet egress width requirements and the inactive leaf contains no doorknobs, panic bars or similar operating hardware.
And here is the text from the edition of NFPA Does the NFPA have the same exceptions? If a second leaf is provided for a reason other than required egress, that leaf can have a releasing mechanism that requires the egress leaf to be released first. However, in such a case, the leaf not used for egress must be arranged so as not to be mistaken for the egress door. What I am trying to find is the hardware that I can install to remove the manual bolts and put in a system that is approved.
What if the door has unequal leaves , x mm? I have this issue on one of my projects. Please advise. The same rules would apply. Don't subscribe All Replies to my comments Notify me of followup comments via e-mail.
You can also subscribe without commenting. Decoded: Manual Flush Bolts. View Larger Image. Here is the text from the IBC: And here is the text from the edition of NFPA 7.
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FF: This door may save your life. Jim Berg March 8, at pm - Reply. Manual extension flush bolts are available for both wood and hollow metal doors. Wood doors will have the top corner mortised to receive wood door flush bolts. When the wood door flush bolts are used it can sometimes weaken the top corner of the wood door. Also, because they are positioned at the top corner of the doors, they can be harder to reach, so manual wood door flush bolts are not used as often. Fortunately, wood doors can also be prepped to receive metal door flush bolts.
Metal door flush bolts have longer rods which lowers the height of the lever used to retract the bolts. The height of the door can determine the length of rod that will be used. Self-latching flush bolts are often called constant latching flush bolts.
These bolts are a combination of the manual extension flush bolts and automatic latching flush bolts. The top bolt must be manually retracted by a push-button or slide in order to open. However, unlike the manual flush bolts that holds the bolt retracted, the constant latching bolt is spring-loaded and projects itself back out when the slide or push-button is released. Additionally, the constant latching top bolt has a beveled face, similar to a latch on a bored lockset. When it comes in contact with the lipped strike it will re-latch by itself.
If a top bolt and a bottom bolt are used, the bottom bolt will be an automatic latching flush bolt. Automatic flush bolts are projected and retracted without any manual operation required. When the active leaf is opened, the flush bolts are retracted, allowing the inactive door to open.
When the active leaf is closed, the flush bolts are automatically latched again. This automatic latching is accomplished by a small spring-loaded button on the edge of the flush bolts which, when depressed, will extend the flush bolts and remain latched.
When the active leaf is opened, these buttons will protrude from the edge of the door which pulls the flush bolts to the retracted position. When the active door is shut again, it will push these buttons and cause the bolts to re-latch.
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