Printed from the blog of Lori Greene, AHC/CDC, CCPR, FDAI
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Oct 13 2011

WWYD?: Back-to-Back Doors

Category: Door Closers,Fire Doors,WWYD?Lori @ 11:29 pm Comments (4)

Which product application do you use when you have doors that open back-to-back and need to close upon fire alarm?  I was just explaining my preferred option to a specwriter last week, and then these photos arrived…perfect timing!

When I have a door on an electrified hold-open that opens against the wall, I prefer to use a wall-mounted magnetic holder like the LCN SEM7800 series.  This product is very reliable and requires no maintenance if installed properly.  But when a wall-mounted magnetic holder can’t be used, I usually use an LCN 4040SEH hold-open track with an LCN 4111-Cush closer.  The Cush provides the required auxiliary stop, and the separate SEH track holds the door open until released by the fire alarm, at which point the 4111 closes the door.  The operation is the same as an LCN 4040SE closer/holder unit, except with the addition of the positive stop.  WWYD?

The problem:

The solution:

And here are some other creative attempts at solving this problem:

Thank you once again to Nolan Thrope of Ingersoll Rand Security Technologies of Metro-NY, who obviously gets out more than I do and has generously offered a wealth of photos of various applications.  If you have photos of any creative hold-opens (or any other door photos you’d like to share), send them along!

4 Responses to “WWYD?: Back-to-Back Doors”

  1. Liz Lenox says:

    I agree completely with the stop arm closer x Sentronic Holder solution. Most Important – The Closer and the Holder must be templated to the exact same degree of opening during installation or this will not work. Oh, yeah, and Nolan taught me that…

  2. Jack Ostergaard says:

    We had been specifing the configuration that is shown -4040SEH+4111CUSH. We were told by our local IR rep that the “party line” had changed to 4040SE+GJ 904SE – reportedly this is a sturdier configuration. Our application is schools [K12] so we are concerned with 1)Vandalism, 2)Maintainence, 3)Initial Cost, and 4)Replacement Cost. Is one really better than the other?
    The other problem we have is getting a proper installation – 4040SE on Push Side and 904SE on Pull side – right?
    And what about Concealed Overhead GJ104SE? Is that a good idea?

  3. paul baril ahc/cdc says:

    The solution for the back to back opening doors is not a great one.
    The problem is that the doors are always opened past 90 degree, breaking the slide track assembly. In most schools in my area, 75 percent of the closers in this application are broken.Floor stops are not an option since they would be a tripping hazard.
    The only good solution I have found is to build a small wall and installing a closer and wall mag to hold the doors open. The walls act as a positive stop.

  4. Mojo says:

    I agree wholeheartedly with Paul. For a recent middle school project, this was the only acceptable solution.

    We tried using exposed overhead stops, but these were never set nor adjusted correctly to prevent the doors from hitting each other.

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