The size of its underground shelters was 790m and the length of the archades was 960 meters, while 300 steps connect the multi-storey building. The guard of the fort consisted of 469 men and had 10 simple and five double pill-boxes, 4 antitanks, 2 howitzers, 3 emplacements, 3 double bombers, 8 observatories and 9 exits.