Generally speaking, the larger the covered area of the greenhouse, the better the thermal insulation performance in winter, the stable temperature, and the less affected by low temperature, but it is also easy to cause poor ventilation and inconvenient management. The general area is preferably 300-600 meters. The length of the greenhouse is preferably 40 to 60 meters. If it is too long, the transportation and management will be inconvenient, and the temperature difference between the two ends will be too large, resulting in inconsistent growth and development of vegetables in the facility.
The width of the greenhouse is preferably 8-12 meters. If it is too wide, the ventilation is not good, the angle of the shed surface is too small, and the amount of light entering is insufficient. In addition, the load of the arch pole increases, the support stress decreases, and the wind and snow pressure weakens. difficulty.
The height of the greenhouse is suitable for 2.2~2.8 meters, and the highest should not exceed 3 meters. The shoulder height on both sides of the greenhouse is 1.2~1.5 meters, too low will affect the growth of tall stems and climbing vegetables.
The higher the greenhouse, the greater the pressure it can withstand the wind, and it is vulnerable to wind damage, and the insulation capacity is reduced, and the construction cost is also high. But when the greenhouse is too low, the curvature of the shed surface becomes smaller, the ability to withstand pressure is weak, the snow is not easy to slide down, and it is easy to accumulate water, which is easy to cause overloading and collapse of the shed.
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