GREENHOUSE Russian patent published in 1999 - IPC

FIELD: agriculture, in particular, constructions for plant growing in protected ground. SUBSTANCE: greenhouse has side arched wooden girders pivotally connected along greenhouse ridge and at greenhouse bottom along perimeter by lower side and end racks and at different levels by related side racks. Greenhouse is covered with light-transmitting film and has entrance in at least one end. Arched girders are formed as two arcs curved at one side and interconnected with their ends. Spacers are arranged between arcs. Entrance is formed as cover defined by two door racks which are mounted with their ridge portion on pins, each connected with related half of side light-transmitting film. Receptacle for racks and catch for retaining door racks in vertical position are disposed in mid portion of end rack. EFFECT: simplified construction, reduced metal usage, enhanced operational capabilities and simplified assembling and disassembling. 3 cl, 5 dwg