Multi Span Roof Window Gothic Film Greenhouse

multi span roof window gothic film greenhouse for planting rose in it with irrigation system

Modern agricultural enterprises cannot operate without film-covered multi-span greenhouses. These greenhouses promote photosynthesis, meet the appropriate light requirements of different crops, and thus facilitate crop growth. Therefore, installing multi-span film-covered greenhouses is essential.

A multi-span film greenhouse mainly consists of components such as a foundation, columns, main arch, secondary arch, gutters, external shading, internal shading, fans, and wet curtains. The steel pipes used in the greenhouse structure undergo rust-proofing treatment. The main steel structural components of the multi-span greenhouse must be hot-dip galvanized and passivated. All connecting bolts and nuts that come into contact with rainwater are galvanized. The normal service life of the main frame of a multi-span film greenhouse can reach 15-20 years or more.

Features of the film greenhouse:

1. The frame is securely installed using connectors, offering good versatility and interchangeability, and is easy to install. Major components are hot-dip galvanized, extending their service life.

2. Shoulder height ranges from 3 to 6 meters, and the door width is 2 meters, improving working conditions inside the greenhouse and facilitating mechanized operations.

3. Diagonal bracing is installed at both ends of the greenhouse to enhance its snow resistance. The durability of the film greenhouse was considered during its construction. The frame has a lifespan of up to 20 years, and the film has a lifespan of 5 years.

The main structure of the multi-span film greenhouse uses hot-dip galvanized steel pipes as the frame material, ensuring the service life of the greenhouse structure. All frame members are connected using bolts.

Film-covered multi-span greenhouses can be equipped with IoT automatic control systems and can be optionally equipped with heating systems, internal and external shading systems, internal insulation systems, irrigation systems, fan and water curtain cooling systems, supplemental lighting systems, seedbeds, and other configurations.

Multi-span film greenhouses play a vital role in plant production and development. They provide plants with the necessary temperature and humidity environment. As one type of greenhouse, film greenhouses are characterized by high light transmittance, good heat retention, and leak-proof design.

Film thickness: The thicker the film, the longer the aging time. Polyethylene aging is caused by ultraviolet radiation; therefore, films with added ultraviolet absorbers and stabilizers should be selected. Films with ultraviolet absorbers act as a protective layer, absorbing ultraviolet rays and converting them into heat energy. Ultraviolet stabilizers can effectively extend the aging time of the film and even repair damaged molecular structures.

If the membrane is exposed to high temperatures, especially the part in contact with the frame, hot spots can easily form. These spots can reach temperatures as high as 80 degrees Celsius. This part of the membrane will be particularly prone to aging and damage. This is why shade nets cannot be directly covered over the membrane; doing so will accelerate its aging.

When installing the membrane, ensure it is tightened evenly. During summer construction, the membrane does not need to be installed too tightly, as a tighter membrane structure in summer may cause it to tear due to shrinkage when temperatures drop in winter. If construction is carried out in winter, the membrane should be stretched taut to prevent expansion in summer.

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