Ist wie vorgezogenes Weihnachten! Das sind die ersten (dokumentierten) Trench Batwings (Corner Thrust Blocks) auf europäischem Boden :-) Das ist nichts anderes als ein Alu-Verbindungsstück für zwei Trench Panels, um eine Ecke zu bilden. Revolutionäre Methode, um die Ecken in einem T- oder L-Graben abzufangen.

It’s Christmas come early as I have received the first documented Trench Batwings (aka Corner Thrust Blocks) in Europe, at least I’d like to think so :-) They are a corner piece connecting two Trench panels in a L or T Trench.

Hier sind sie im Einsatz: // Here they are in use:



Die alte, „klassische“ Version: // The old, „classic“ version:

Old L

Problematisch, weil Scherkräfte nicht aufgefangen werden // Which is problematic as shear forces are not captured:


Und auch bei der Druckbeaufschlagung der Stützen zu folgenden Problemen führen kann: // Which can also lead to the following problems when pressurising the struts:

Die Batwings sind nur ein Teil eines Gesamtsystems. Das wird dann bei Gelegenheit vorgestellt. Auf jeden Fall freuen wir uns darauf, die Dinger in der neuen Übungsgrube der Feuerwehr Freilassing zu testen, die auch L und T erlaubt.

The Batwings are but one part of an entire system, we will present this in due time. We look forward to put this to the test in the new trench training facility of the Freilassing Fire Department.


  1. Irakli, I visit your site often. Thanks for starting to add the English subtitles in your descriptions and stories. I’ve been following Ron and the MUSAR guys as well. Will be adapting several of their techniques and change some of our methodology here in Maryland. Quick question: what’s the thickness of the aluminum on the corner brackets and is it 6061 alloy? Thanks
    John Zimmerman
    Howard County Fire and Rescue
    Special Operations
    10155 Old Columbia Rd
    Columbia, MD 21045

  2. Irakli West

    John, thanks for the comment. Always nice to hear someone is following our off-mainstream-topics! I’d say Ron and his gang are probably the reference right now, with a lot of details small and large I never knew or saw taught elsewhere to date.

    As for the corner brackets, these are quick-and-dirty prototypes using ungraded alloy and ungraded welding points. Thickness is 1cm (about 3/8″).

    Hope this helps.

    Regards, Irakli

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