The main structure of the single-span arch greenhouse is designed for simplicity and practicality, offering low construction and operational costs. In cold climates, the roof can be engineered with a double-arch and double-layer film design. This configuration effectively prevents heat loss and blocks the intrusion of cold air, providing excellent insulation during winter months while maintaining low operational expenses. For the sidewall and end-wall coverings, you can choose from polycarbonate sheets, glass, or single/double-layer plastic film to suit your specific climate and budget requirements.

Greenhouse Film Specifications

The covering film is a critical component for light transmission and climate control. We typically use high-quality Polyethylene (PE) or Polyolefin (PO) film with the following properties:

• Material: UV-stabilized Polyethylene (PE) Film
• Thickness: 120 to 200 microns (customizable)
• Features: Anti-drip, anti-fog, and UV-resistant coating
• Light Transmittance: >92% for optimal photosynthesis
• Light Diffusion: Approximately 53% to reduce plant stress from direct sunlight
• Available Colors: Clear (white) or light blue
• Service Life: 4 to 5 years under normal conditions

This specialized film ensures a consistent internal microclimate, protects crops from harmful UV rays, and minimizes condensation drip that can lead to disease.

Technical Specifications

Our single-span arch greenhouse is highly customizable to fit various agricultural and horticultural projects. Below are the standard and customizable specifications:

Comprehensive Construction Process

We follow a systematic and professional construction process to ensure a durable and fully functional greenhouse. Each stage is crucial for the final performance and longevity of the structure.

1. Site Preparation & Infrastructure

The process begins with thorough site leveling and the pouring of a solid concrete foundation with precisely placed anchor bolts. This creates a stable base capable of supporting the entire structure under various weather loads.

2. Erection of the Main Steel Frame

The hot-dip galvanized steel arches and purlins are assembled and secured to the foundation. This creates the robust primary skeleton of the greenhouse, designed to withstand wind and snow loads according to local codes.

3. Installation of Covering Material

The selected PE or PO film is carefully tensioned and fastened over the frame using specialized aluminum profiles and lock channels. This ensures a tight, wrinkle-free seal that maximizes light entry and weather protection.

4. Ventilation System Setup

Sidewall roll-up vents and/or roof vents are installed. These can be manual or automated with motors, allowing for precise control of temperature and humidity by facilitating natural air exchange.

5. External Shading System

An external shading screen, often made of aluminized or black net, is mounted on a separate structure above the roof. It can be deployed automatically to reflect excess solar radiation and prevent overheating during peak summer months.

6. Internal Shading & Thermal Screen

An internal movable screen is installed beneath the roof. This screen provides shade, helps retain heat at night (acting as a thermal blanket), and can reduce energy costs for heating and cooling.

7. Cooling System Installation

For warmer climates, systems like pad-and-fan cooling or misting lines can be installed. These systems actively lower the internal temperature and increase humidity to create an ideal growing environment in hot weather.

8. Drainage System Completion

Internal gutters are connected to downpipes, channeling rainwater away from the structure efficiently. Proper drainage is essential to prevent water accumulation, foundation issues, and excessive internal humidity.

9. Electronic Control System Integration

A central control panel or computer system is installed to automate and monitor all environmental systems (ventilation, shading, heating, cooling). Sensors for temperature, humidity, and light feed data to the system for precise, hands-off management.

10. Heating System Setup (Optional)

For year-round production in cold regions, heating systems such as hot air heaters, radiant pipes, or unit heaters can be installed to maintain optimal root and air temperatures during winter.

11. Installation of Seedbeds & Internal Layout

The final step involves setting up the internal growing infrastructure. This includes installing raised seedbeds, rolling benches, or ground-level planting areas, along with irrigation lines, to prepare for crop cultivation.

Frequently Asked Questions (FAQ)

• Q: What are the main advantages of a single-span arch greenhouse compared to a multi-span?
  A: Single-span greenhouses are generally simpler, have lower initial construction costs, and are easier to ventilate naturally. They are ideal for smaller-scale operations, research plots, or growers who prefer separate compartments for different crops. Multi-span structures offer better space efficiency and heat retention for very large, commercial operations.
• Q: Can this greenhouse be used in a snowy area?
  A: Yes, absolutely. The structure can be engineered for specific snow loads by increasing the steel pipe diameter, thickness, and reducing the arch spacing. The smooth, arched roof also helps snow slide off more easily. The double-layer film roof option provides extra insulation, which also helps melt snow on contact.
• Q: How do I choose between PE and PO film?
  A: PE (Polyethylene) film is a cost-effective standard option with good clarity. PO (Polyolefin) film is generally more durable, has better anti-drip properties, and maintains its light transmission for a longer period, though it is typically more expensive. The choice depends on your budget and the required lifespan for your project.
• Q: Is automation necessary for the ventilation and shading systems?
  A: While manual systems are available and reduce upfront cost, automation is highly recommended for consistent crop results. Automated systems controlled by sensors react instantly to changes in sunlight and temperature, preventing plant stress, saving labor, and optimizing the growing environment 24/7.
• Q: What kind of foundation is required?
  A: A continuous concrete footing or individual concrete piers with anchor bolts is standard. The specific design depends on your local soil conditions and the required wind/snow load rating. Our engineers provide foundation drawings tailored to your site survey.