1. The frame functions and environmental requirements of glass greenhouses should be constructed based on functional needs. Greenhouses should be categorized into types such as productive greenhouses, research and experimental greenhouses, and ornamental exhibition greenhouses, etc., with different design layouts for each type's plan and section.

2. Structural requirements for glass greenhouse frames: During operation, the greenhouse structure is subjected to various types of loads, such as wind loads, snow loads, crop loads, and equipment loads. Under normal use, the structure should remain stable under these loads, meaning the greenhouse structure should be capable of withstanding all possible load events without experiencing deformations or damages that would affect its use.

3. Durability requirements for glass greenhouse frames: under normal use and maintenance, the main structure, protective structure, protective components, and various equipment of the greenhouse should all possess the specified durability.

4. The internal space requirements for glass greenhouse frames: The greenhouse interior is the location for plant growth and production management activities. In addition to the cultivation space for plants, it is also necessary to provide sufficient space for the placement and normal operation of various production equipment. Furthermore, adequate space should be allocated for the operators and managers.

5. Energy-saving requirements for glass greenhouse frame structures, including the architectural design and construction of greenhouse components such as the foundation, walls, roof, side windows, skylights, and gutters, as well as the connection methods between these components, should not only fulfill their respective functional purposes but also meet energy-saving criteria.