Such structures as artillery courtyard were attached to the main building in the second half of the 1930s. In peacetime these courtyards served as watchhouses, and in wartime they could be used for accommodation of the infantry or an additional combat load of the pillbox.
A half-caponier is divided into the following main sections: two fighting casemates, a commandant’s compartment which is equipped with a periscope, a telephone and a radiostation, a filter room and an engine room with a gasoline-electric set and a ventilator.
In the filter room there therre are 16 filters connected into 4 columns with 4 elements each.
The commandant’s compartment is the smallest room in a pillbox, where a periscope with 10-fold enlargement, a radio station, a telephone and voice pipes were set up.
