Method to make long metal rolled products, comprising the following steps: - continuous casting at high hourly productivity, from 35 t/h to 200 t/h, done by a single casting machine, defining a casting axis, of a cast product with a rectangular or equivalent section, with a ratio between the larger side and the smaller side higher than or equal to 1.02 and less than or equal to 4; - shearing to size of the cast product to define a segment of a length comprised between 16 and 150 m and with a weight comprised between 10 and 100 tons; - introduction of the segment, having an average temperature of at least 1000°C, into a maintenance and/or possible heating furnace, comprising a first movement section for moving the cast product disposed in axis with said casting axis; - lateral transfer of the segment inside the maintenance and/or heating furnace in order to dispose it in a second movement section for moving the cast product disposed parallel and misaligned with respect to the first movement section and aligned with a rolling axis parallel and offset with respect to the casting axis; - reduction of the section in a rolling mill defining said rolling axis, characterized by a - pre-reduction of the section of the cast product in a reduction/roughing unit, wherein said reduction/roughing unit is positioned upstream or downstream of said maintenance and/or heating furnace, in which said positioning upstream or downstream is correlated to the speed of entrance of the cast product at the entrance of a first stand of the reduction/roughing unit, in which said reduction/roughing unit transforms the entering rectangular section in a squared, round or oval section for the subsequent rolling step. - continuous casting at high hourly productivity, from 35 t/h to 200 t/h, done by a single casting machine, defining a casting axis, of a cast product with a rectangular or equivalent section, with a ratio between the larger side and the smaller side higher than or equal to 1.02 and less than or equal to 4; - shearing to size of the cast product to define a segment of a length comprised between 16 and 150 m and with a weight comprised between 10 and 100 tons; - introduction of the segment, having an average temperature of at least 1000°C, into a maintenance and/or possible heating furnace, comprising a first movement section for moving the cast product disposed in axis with said casting axis; - lateral transfer of the segment inside the maintenance and/or heating furnace in order to dispose it in a second movement section for moving the cast product disposed parallel and misaligned with respect to the first movement section and aligned with a rolling axis parallel and offset with respect to the casting axis; - reduction of the section in a rolling mill defining said rolling axis, characterized by a - pre-reduction of the section of the cast product in a reduction/roughing unit, wherein said reduction/roughing unit is positioned upstream or downstream of said maintenance and/or heating furnace, in which said positioning upstream or downstream is correlated to the speed of entrance of the cast product at the entrance of a first stand of the reduction/roughing unit, in which said reduction/roughing unit transforms the entering rectangular section in a squared, round or oval section for the subsequent rolling step.