Multi-Span film greenhouse 07
Multi-span Plastic Film Greenhouse
Multi-span plastic film greenhouses are the main facilities for modern large-scale agricultural planting. Compared with single arch greenhouses, multi span structures have larger continuous internal space, higher land utilization efficiency, and more convenient and simple mechanized operations. The entire greenhouse structure is rust resistant, meets load-bearing standards, and is stable and durable, making it a good choice for overseas engineering procurement.
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The appearance of the multi-span plastic film greenhouse is connected by a gutter, presenting a pointed arch structure. The overall structure consists of components such as foundation columns, arch pipes, gutters, doors, and manual top roll membranes. The top and surrounding areas are covered with 0.12mm thick polyethylene film, with a light transmittance of over 85%, meeting the crop's demand for sunlight. In order to ensure the service life of the film, galvanized wind resistant card slots and plastic immersed card springs are used for fixation, with a service life of more than 3 years.
Multi-span plastic film greenhousestructure：
The entire main frame adopts the internal and external hot-dip galvanizing anti-corrosion process, with a uniform galvanized layer that can withstand rain and water corrosion during long-term use, greatly extending the service life of the skeleton. It is assembled with bolts, making on-site installation more convenient and can also be replaced with accessories in the later stage.
Column and horizontal tie rod: Choose rectangular steel pipes with a spacing of 4m as the vertical load-bearing core of the greenhouse, supporting roof loads and wind and snow loads.
Arched pipe: Galvanized round pipe is bent into an arch shape, forming an overall arched skeleton to achieve reasonable stress, and can also be smoothly laid with thin film.
Suspension rods and V-shaped braces: As the main supporting components, they play a role in sharing roof loads and improving overall wind resistance performance.
The entire framework can have a service life of over 10 years in conventional agricultural environments, and maintenance is also very simple during use. It is very suitable for planting crops such as tomatoes, cucumbers, leafy vegetables, strawberries, flowers, and Chinese herbal medicines in all seasons. The production process supports size customization and comes with supporting systems.
Why choose our company's multi-span plastic film greenhouse?
Our company is a professional manufacturer of multi-span plastic film greenhouses with extensive experience in the production and sale of greenhouse systems. We operate comprehensive production lines, and all structural profiles and components undergo rigorous inspection before leaving the factory to ensure excellent value for money. We provide customized designs tailored to the specific wind and snow loads, site dimensions, and crop types of each overseas project. Our dedicated team manages the entire process—from production and packaging to shipment—and provides detailed installation drawings and instructional videos to facilitate on-site assembly for our international clients.
Secure Structural Design: Features prefabricated concrete foundations and standardized hot-dip galvanized structures. The load-bearing design ensures compliance with wind and snow resistance standards, making it suitable for long-term commercial cultivation projects.
Comprehensive Anti-Corrosion Design: Utilizes a hot-dip galvanized main framework and stainless steel bolts, preventing rust and avoiding the maintenance challenges often associated with corroded fasteners.
Flexible Expansion Options: Supports the integration of shading, thermal insulation, and irrigation systems, with the ability to upgrade or modify the setup based on specific crop requirements and local climatic conditions.
Comprehensive Anti-Corrosion Design: Utilizes a hot-dip galvanized main framework and stainless steel bolts, preventing rust and avoiding the maintenance challenges often associated with corroded fasteners.
Flexible Expansion Options: Supports the integration of shading, thermal insulation, and irrigation systems, with the ability to upgrade or modify the setup based on specific crop requirements and local climatic conditions.
The forced ventilation system in a multi-span plastic film greenhouse employs mechanical means to facilitate air circulation. By using low-speed, high-capacity exhaust fans to drive air exchange—often in conjunction with roof vents and evaporative cooling pads—the system effectively lowers the temperature and humidity within the greenhouse, creating an environment well-suited for crop growth.
Plastic film serves as the primary covering material for multi-span plastic film greenhouses. It is applied over the exterior of the arched framework to provide thermal insulation, wind and rain protection, and light transmission. Specialized greenhouse film is engineered to withstand the challenges of large-span roof structures, high-humidity interior environments, and prolonged exposure to outdoor elements; it not only meets the requirements for continuous, long-term use but also acts as a critical component for facilitating plant photosynthesis. Installation should ideally be carried out on a calm, sunny day. The film is secured to the greenhouse’s arched pipes and gutters using a locking channel and spring wire system. It should be pulled taut to prevent slack, which could otherwise lead to the film flapping and sustaining wear during high winds.
Single-layer film: This greenhouse design features a single layer of agricultural plastic film covering the roof and sidewalls. It is a common choice for small-to-medium commercial farms and seedling nurseries due to its low material costs, simple installation, short construction period, and ease of film replacement. The single-layer structure offers higher light transmission, ensuring abundant illumination—ideal for light-loving crops. However, its thermal insulation performance is moderate, leading to faster heat loss during winter; in colder regions, the addition of thermal insulation blankets is recommended. This type is suitable for temperate and subtropical zones.
Double-layer inflated film: This design utilizes two layers of plastic film on the roof, with the perimeter fully sealed using airtight strips. A small inflation fan continuously pumps low-pressure air into the space between the two layers, creating a stable insulating air buffer. The greenhouse framework must be engineered to withstand the wind loads exerted on the double-layer structure, as well as the additional load caused by the expansion of the film; consequently, the structural components are typically more robust than those used for single-layer greenhouses. This configuration reduces heat loss in winter and offers superior resistance to hail, wind, and snow compared to single-layer systems. However, because light must pass through two layers of film, there is some reduction in light transmission. This design is well-suited for high-latitude, cold regions and for cultivation projects that require high levels of thermal insulation and energy efficiency.
Double-layer inflated film: This design utilizes two layers of plastic film on the roof, with the perimeter fully sealed using airtight strips. A small inflation fan continuously pumps low-pressure air into the space between the two layers, creating a stable insulating air buffer. The greenhouse framework must be engineered to withstand the wind loads exerted on the double-layer structure, as well as the additional load caused by the expansion of the film; consequently, the structural components are typically more robust than those used for single-layer greenhouses. This configuration reduces heat loss in winter and offers superior resistance to hail, wind, and snow compared to single-layer systems. However, because light must pass through two layers of film, there is some reduction in light transmission. This design is well-suited for high-latitude, cold regions and for cultivation projects that require high levels of thermal insulation and energy efficiency.
Greenhouse films are commonly available in thicknesses of 0.08 mm, 0.10 mm, 0.12 mm, and 0.15 mm. Greater thickness provides superior tensile strength, enhanced resistance to aging and hail impact, and a longer service life. Ample light exposure boosts crop photosynthesis, leading to higher yields and improved quality. For multi-span greenhouses, which feature large roof areas, high-tensile-strength film is essential; it resists tearing caused by strong winds or the weight of accumulated snow, thereby enhancing the overall structural safety of the greenhouse. As a primary manufacturer of multi-span plastic film greenhouses, we also supply specialized greenhouse films. We recommend the optimal thickness and functional composition based on local climatic conditions, and we ship the film alongside the greenhouse framework to streamline the procurement process for our customers.
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We Provide Technical Design, Equipment Supply And Construction Coordination For Greenhouse Projects, Integrating Construction And Agricultural Technology Resources To Help Efficiently Complete Comprehensive Agricultural Projects.
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Our Technical Team Deeply Adapts To The Planting Needs Of Different Climate Zones And Crops, Providing You With a Full-Chain Customized Solution From Scheme Design To Operation And Maintenance Support.
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Relying On Mature Experience Serving More Than 1,000 Customers In Over 90 Countries Worldwide, We Understand That Detailed Control Is The Core Guarantee Of Project Success, And We Can Efficiently Handle The Complex Scenarios And Delivery Requirements Of Overseas Projects.
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