Tesmec developed, for the polish national railways (PKP, Polskie Koleje Panstwowe), two wiring wagons for line construction and maintenance, composed by modular units. They have been installed on two 80 ft length certified container wagons (supplied by customer) by twist-lock callipers and additional locks. Wagon 1 consists of a storage system for railway wiring operations and is composed by 4 units mounted on 4 flats of 20 ft. (modular storage units). Wagon 2 consists of a tensioning system for railway wiring operations and is composed by 4 units mounted on 4 flats of 20 ft. (Workshop unit, power unit, Storage and Crane unit, Tensioning unit). The system can operate in a temperature range from -30°C to 40°C.