Standards Committee for Civil Engineering of the German Institute for Building Technology (NABau), Working Committee NA 005-09-01 AA
www.din.de

BF e.V.
Federal Flat Glass Association (registered association)
www.bundesverband-flachglas.de

Verband für Fassadentechnik e.V.
Association of facade technology (registered association)
www.v-f-t.de