Patent ID: 8091288

Claim:
A greenhouse construction with rail system for moving a carriage thereover for moving plants or carrying out further treatments thereon, said greenhouse construction comprising: a movable carriage ( 15 ) comprising wheels ( 14 ); a roof construction ( 2 ) comprised of plural connected individual roofs ( 4 ); plural vertical columns ( 3 ); first and second longitudinal beams ( 9 , 10 ) extending, in a first direction, between and connected to said columns ( 3 ), the first and second longitudinal beams ( 9 , 10 ) maintaining cohesion between said vertical columns ( 3 ), said first and second longitudinal beams comprising an integrated rail system for supporting the movable carriage, the integrated rail system contributing structural strength, as part of the first and second longitudinal beams, supporting the roof construction, the first and second longitudinal beams, including the integrated rail system, extending continuously over a distance of at least three successive columns; plural gutters ( 19 ) running in a second direction, between and over the first longitudinal beam ( 9 ) and the second longitudinal beam ( 10 ); each individual roof ( 4 ) comprising one of the gutters ( 19 ) and extending, in the second direction, between and over the first longitudinal beam ( 9 ) and the second longitudinal beam ( 10 ); plural ridge sections ( 21 ), each ridge section ( 21 ) connecting two of said individual roofs ( 4 ) along edges of the individual roofs, the ridge sections ( 21 ) extending in the second direction, each individual roof ( 4 ) comprised of plural panels ( 5 ), each panel extending from a corresponding one of the gutters ( 19 ) to a corresponding one of the ridge sections ( 21 ), the panels ( 5 ) connected to each other from the first longitudinal beam ( 9 ) to the second longitudinal beam ( 10 ); and the movable carriage ( 15 ) supported by each of the first and second longitudinal beams ( 9 , 10 ) and fully extending between the first and second longitudinal beams ( 9 , 10 ), the carriage movable in the first direction, wherein, each of the first and second longitudinal beams ( 9 , 10 ) comprises two longitudinal sections ( 32 , 33 ) extending in the first direction with an upper, first of the longitudinal sections ( 32 ) located above a lower, second of the longitudinal sections ( 33 ), the two longitudinal sections are joined, along a centerline of each longitudinal section, by link sections ( 17 ), and the lower, second of the longitudinal sections ( 32 ) comprises a support part ( 35 ) extending in the first direction, the support part ( 35 ) taking the wheels ( 14 ) of the carriage ( 15 ), the integrated rail system comprising the support part ( 35 ) taking the wheels ( 14 ) of the carriage ( 15 ).