The ETF-400 is a small transport-elevator rail trolley consisting essentially of a high quality steel frame and of an elevatable load platform and a load support, mounted on the elevatable platform which has a lateral translating movement and a rotating movement. Mutually independent rail wheels, each with a shock absorber, are mounted on the frame.
The movement of the elevatable platform and the load support is commanded through the hydraulic controls of the hydraulic lifting machine, to which the trolley is connected. The total mass of the ETS-400 rail trolley is 2,600 kg (2.6 Ton). The trolley has a standard load capacity of 40,000 kg (40 Ton).