Venlo greenhouses are multi-span, pitched-roof glass greenhouses that utilize a unique small-roof truss structure to achieve large, column-free spaces. They are currently the mainstream greenhouse type in high-end protected agriculture in China.
The core feature of this type of greenhouse lies in its V-shaped or W-shaped roof ridge supported by a light steel truss structure, with each span composed of multiple pitched small roof sections. Unlike traditional greenhouses with arched or single-slope designs, the Venlo design optimizes load distribution, reducing the number of internal columns while maintaining structural stability, achieving a light transmittance of over 90% and flexible space utilization.
They primarily use hot-dip galvanized steel frames, with standard spans of 6.4 meters, 9.6 meters, or 12 meters, eaves heights of 4-6 meters, and ridge heights of 5-8 meters. The roof slope angle is typically 22-30 degrees, an angle that effectively reduces reflection losses from direct sunlight. The covering material is mostly 4mm or 5mm tempered glass, with some using polycarbonate hollow sheets. According to the 2024 standards of the Ministry of Agriculture and Rural Affairs, the light transmittance must be above 85%.
