T/ZJNJ 004-2018 The technical specifications for agricultural continuous steel frame greenhouse facilities

Scope

Scope: This standard specifies the terms and definitions, product technical requirements, installation, test methods, acceptance inspection, and marking, packaging, transportation, and storage for agricultural multi-span steel frame greenhouses. This standard applies to the production, installation, and inspection of agricultural multi-span steel frame greenhouses. Its improved products can be implemented with reference to this standard. Main technical contents: 1. Safety and stability: The greenhouse structure and all its components shall comply with the requirements of this standard, and be able to safely withstand all possible load combinations (wind load, snow load, etc.), including dead loads. The design of any critical section of components shall not exceed the allowable stress of the steel pipe material. The greenhouse and its components shall have sufficient stiffness and toughness to resist longitudinal and transverse deflection, vibration, and deformation. They shall not lose stability under allowable loads, pressures, and thrusts (wind load, snow load, etc.). When locally damaged by external forces, the greenhouse structure as a whole shall maintain stability. 2. Durability: The service life of the greenhouse frame shall be ≥10 years. All metal structural parts shall adopt necessary anti-corrosion measures, and the corrosion resistance of main components (arch rods, columns, horizontal rods, longitudinal rods, guttering, etc.) shall be ≥10 years. 3. Load requirements: The greenhouse frame shall adopt a "two-section" structure with arch connectors between two arch rods, meeting the requirements of the greenhouse's overall resistance to wind loads ≥level 10 and snow loads ≥200mm snow thickness. 4. Covering materials: The covering materials shall meet the needs of crop growth in the greenhouse. Multi-functional agricultural films such as anti-aging and anti-fogging polyethylene and EVA with a thickness ≥0.12mm shall be used. When the covering film is eq

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