With A hot galvanized mild steel structure, type A roof ridge can be divided into A span of two points, A span of three points and A span of four points.

1 Framwork material 

Hot galvanized steel.This kind of steel has good anticorrosion and antirust effects, which can help extend the service life of the greenhouse.

the Venlo Greenhouse is supported by the square tubes, connected by truss, gutter, and other related connectors. They are made by galvanized steel. The Glass and PC-sheet Venlo Greenhouses are different from each other mainly at the roof and the covering materials. All of the frame materials are metal, no plastics and no welding point. 

2 Venlo Greenhouse Window Ventilation System 

   The venlo greenhouse window ventilation system can be installed on the roof or side wall, controlled by the gear motor and rack-pinion structure to make the window open or close. On the roof, it can be Driving-rod Ventilation System or Row-rack Ventilation System. On the side wall, it is Row-rack Ventilation. The rack can be straight or curved.

3  Venlo Greenhouse Wet curtain and Fan Cooling System 

    About the venlo greenhouse cooling system, our company is specialized at the products of Cooling Pads and Fans, usually used cooperatively. The Cooling Pad is installed on one side wall of the greenhouse, the Exhaust Fan the opposite. ( The Air Circulation Fan is installed under the roof of greenhouse.) The Exhaust Fan ejects the air from the inside of the greenhouse, (and the Air Circulation Fan promotes the circulation of the air in the greenhouse), negative pressure formed in the greenhouse. The cooling water flows through the Cooling Pad with the help of the water-recycling facilities. The air enters the greenhouse through the Cooling Pad, resulting in the effects of cooling, moistening and air-circulating. The temperature can be cooled down about 8-15 degrees defined by the temperature of the cooling water and the sizes of cooling pad and exhaust fan as well as the size of the greenhouse construction area.

PC SHEET Characteristics 

PC sunlight plate Greenhouse Cover material Compared to other cover materials, polycarbonate hollow plate (PC plate) has good daylighting, warming, lightweight, high strength, prevent dewing, impact resistant. It has many advantages such as only melt but no expending, good heat resistance at high temperature, won’t fracture or break during installation or use process, strong adaptability and security. In short, this plate is economic and durable. In particular, the southern slope of the plate is covered a anti UV coating and the inside of it has resistant function, which can provide anti-aging performance of more than 10 years. The greenhouse which is covered by this kind if material has longer service life, modern appearance, steady structure, fluent visual, effective heat preservation, low operating cost in winter.