Plastic Greenhouse--Large Scale Multi-Span Greenhouse Overal

The large scale multi-span greenhouse has developed increasingly in recent years. Compared with the glass greenhouse, it has the characteristics of light weight, little frame structure material, low cost, long service lifetime. Its adjustment ability can reach the standard of that of the glass greenhouse. Nowadays, the plastic greenhouse is much more popular than that of the glass greenhouse, and it has became the main stream of the greenhouse industry.

Sucn greenhouse in different countries has different structure sizes. But in general, the greenhouse span is 6 meters to 12 meters; width is 4 meters or above; eaves height is 3 meters to 4 meters. But by mechanical ventilation league in the greenhouse, the maximum width can be expanded to 60 meters. The best way to limit that it should be in 50m. The length of the greenhouse can limit to be in 100m or less; but it's not the strict requirement.

Plastic greenhouse's main structure usually use hot dip galvanized steel pipe as main bearing structure. Because the plastic film has the characteristics of light weight, weak wind-proof, weak snow load resistance ability. Therefore, the whole structure ability should be fully considered.  And the main structure of the snow load carrying capacity iss determined by the construction area's local climate in winter. In those cold area or the north area of the earth in winter, the designation should not be less than 0.35 KN/square meter.

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