Abstract: The installation comprises a drive incorporating a guy rope provided at each end with a swivel joint, a driven rotating element and a pair of driving pulleys, all secured to the guy rope. A pair of driven pulleys is opposed to the pair of driving pulleys. A pair of endless cables is tensioned between the driving and driven pulleys and each endless cable has an upper and lower paths. A pair of stretched guide ropes, essentially parallel to the pair of endless cables is used. Each one of the stretched guide ropes is perpendicularly disposed to the stretched drive guy rope and extends from the ends of the latter. At least a pair of carrying lines is perpendicularly disposed with respect to the pair of stretched guide ropes. An actuating assembly including a reversible electric motor is used.