The forts of the first construction stage were built accordingly to typical design of Russian brick fort of 1879, therefore first seven forts have similar construction with the only difference in inned planing, integration into surrounding relief, later renovations and some constructional elements.
The forts of the first construction stage were built accordingly to typical design of Russian brick fort of 1879. First seven forts have similar construction with the only difference in inned planing into. First seven forts are surrounding relief. First seven forts are surrounding later renovations. First seven forts are surrounding some constructional elements. Inned planing is integration.