The higher the shelter, the stronger the resistance is.
It is understood that many vegetable farmers have now demolished and reconstructed the old sheds. However, due to land restrictions, the area of ​​sheds cannot be increased, so growers can only increase the height of sheds. The higher the shed, the greater the impact of adverse environmental conditions such as wind and snow, and the stronger the resistance should be.
The author believes that the height of the shed is raised and its resistance should be strengthened from the following four aspects.
One is the degree of sparseness of steel wire laying. The spacing of the steel wires increases from north to south. For example, after the roof should bear the pressure of insulation covering and earth covering, the distance between the steel wire is generally about 10 cm; the pressure on the sides of the corridor and the most north side planting posts should be taken up after the covering of the greenhouse cover is pulled up, and the wire spacing is generally between 15-20. Between centimeters, the pressure on the middle column of the shed is relatively light, the wire spacing can be between 20-25 centimeters, the pressure on the south side of the shed is the smallest, and the wire spacing is wider, generally about 25 centimeters.
Second, cement pillars were replaced with steel pipes after a certain height. It is understood that after more than 7 meters of cement pillars, even if steel reinforcements are added, it is very likely that the pillars will break when there is slight rocking on the roof. Therefore, when the column of the greenhouse exceeds 7 meters, the steel pipe or tubing that is not easily broken should be replaced. In order to prevent sinking, a square chassis can be welded at the bottom of the chassis and the chassis can be tiled to ensure that the pillars do not sink.
Third, there are three horizontal pillars on the outside of the gable. Due to the large amount of steel wire used and the pressure wire is easily embedded in the wall, three lateral columns must be added on both sides of the wall. The first horizontal pillar is located at the top of the gable. Its purpose is to prevent the steel wires on the roof from moving and embedding, ensuring the stability of the steel wire on the roof over a long period of time. The second track is located in the middle of the gable to prevent the wire from moving and embedding. Due to the slope of the wall, this pillar is liable to slide, so the short steel pipe can be embedded in the wall to fix the column. The third column is used to secure the hanging wire through the wall. In addition, it is also possible to provide a column inside the ground anchor, the purpose of which is to prevent the anchor wire from moving after being pulled by the steel wire on the roof.
The fourth is to strengthen the resistance of the front roof. Five laminating film wires are horizontally pulled outside the shed film, and all the steel wires use non-woven cloth sleeves to avoid causing abrasion to the shed film. The five wires increase in order from top to bottom. Longitudinal film ropes are fixed with claw hooks. Easy to adjust the film rope to the most appropriate level.
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