The utility model relates to gardening, to the cultivation of flowers, vegetables, berries, etc. in hotbeds and greenhouses, and particularly to structures arched greenhouses. The problem to be solved by the proposed utility model for both options is to increase the rigidity of the frame structure of the greenhouse. To solve the technical problem of the first embodiment of the technical solutions in the frame greenhouses consisting of two face and several intermediate prefabricated frames disposed mutually parallel at a distance from one another, the longitudinal horizontal links frames the door opening and the door, located, at least in one of the end frames, intermediate frames are placed under the frame and attached to it the rigidity of the amplifiers consisting of a frame disposed under and attached thereto three profile sections forming the inscribed in trapezoid frame without a base, in contrast to the prior art, the inclined segments stiffness amplifiers connected its lower part with the lower frame part. According to embodiments of two and three amplifiers are provided with struts, the inclined segments connecting stiffness amplifiers with their horizontal segments Amplifiers are also provided with tie rods connecting the middle parts of sloping segments amplifiers rigidity with the proximal portion of the frame. Further according to the third embodiment of technical solutions to improve the rigidity of the door frame opening end frame is provided with at least one strut of the door opening connected to a longitudinal horizontal link frames.Полезная модель относится к садоводству, к разведению цветов, овощей, ягод и т.п. в парниках и теплицах, а конкретно к конструкциям арочных теплиц. Задачей, на решение которой направлена предлагаемая полезная модель по обоим вариантам, является повышение жесткости конструкции каркаса теплицы. Для решения названной технической задачи по первому варианту технического решения в каркасе теплицы, состоящем из двух торцевых и
