The present invention relates to a long span vinyl house having a single acting structure and capable of long span. The present invention provides a vinyl house having a main frame having support members extending upwardly from a support surface and spaced apart from each other by a predetermined distance, and an arch connection member interconnecting the support members. It further includes a reinforcing part including a horizontal reinforcement extending in the horizontal direction to connect the other side, and an auxiliary reinforcement extending in the vertical direction to connect both ends and the support surface of the horizontal reinforcement, the reinforcing portion is the bottom of the horizontal reinforcement It is further provided with a vertical reinforcement extending in the vertical direction so that the upper end is supported by the arcuate connecting member, wherein the reinforcing portion further comprises a fastening unit for interconnecting the support member and the arcuate connecting member, horizontal reinforcing material and auxiliary reinforcing material will be. The long span vinyl house according to the present invention has the advantage that it is possible to make the long span of the single-acting vinyl house easy to manufacture a wide plastic house, and to prevent the occurrence of damage by increasing the bearing capacity for the applied external force. have.
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