Venlo structure is a popular one at present. This architecture uses horizontal girder as main bearer, forming a stable structure with columns. There is consolidation between horizontal girder and column, and hinge is used to connect column and foundation. Pc Board Venlo Greenhouse,Venlo Greenhouse,Venlo Type Pc Sheet Greenhouse JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.alibabagreenhouse.com
In Venlo greenhouse, foundation is made of reinforced concrete and the side wall is made of brick or reinforced concrete plate. The steel frame always use hot dip galvanized light steel. Roof beam adopts horizontal girder structure and using herringbone connection. The horizontal girder bears 2 or more roofs, which is made of aluminum alloy. This material is used as roof structure material and also glass inlay material. Other beams using gutter style to minimize the section. Delighting material of the roof and side wall using the hollow double-layer or multilayer PC board.
PC board is mainly made of PC/PET/PMMA/PP materials, it need sun screen coating to resist ultraviolet resist and ageing, and it is also required to be anti condensation and antidrug.
As a kind of light material, use PC board can greatly reduce the weight of greenhouse structure, and corresponding reduced the size of the steel frame, which saving the cost of steel.
What preparations should be done before the tomatoes are planted
From the aspect of plant protection, planting should be done with pest nets and yellow boards. If they are old sheds, they should be sterilized with a (sterilized, insecticidal) smoke agent for two days and then released for three days. If there is no smoke agent, it can use 1500 times of trichloroisocyanuric acid to spray through the entire shed. If it is a self-cultivation seedling, spray Aketai (thiamethoxam) 1500 times before raising the seedlings and raise the seedlings with the medicine. If the root knot nematode had previously been used in the field, the planting hole must be applied within 1.5 to 2 kg of thiazolyl granules per mu. If nematode-resistant biofungicides are better, sprinkle with a repellent effect on nematodes.