2. The size, thickness and material of steel pipe materials must be well matched. Only reasonable use can ensure the quality of the project, and the specifications and materials must not be reduced.
3. Reasonable structure: the size of arch bar must meet the load-bearing needs of greenhouse buildings. According to the span, height, shoulder height and the weight of covering material, double beams, cross beams, umbrella supports, columns and longitudinal tie rods (number of tracks) are arranged. In order to facilitate farming, temporary flexible reinforcement can also be adopted. Such as columns: Dismantle (put) when farming, and press up (put down) when it snows to prevent snowstorms.
4. Connection mode: The connection mode should be strictly controlled, such as the position of the screw, the number of uses, the winding of the adhesive tape, the fixing of the pull ring and the depth of the fixing rod of the wrapping machine. Otherwise, the film will be damaged, the clamping groove will fall off and bend, the film pressing line will be difficult to fix and maintain, it will be inconvenient to change the film, the heat preservation effect will be low, the drying will be time-consuming, and the film winder cannot be used.