I. Feature Good heat retention, high intensity, easy assembly, energy saving, anti dew, strong impact resistance and long service life, etc Ii. Structural characteristics - Venlo structure or a shape structure. - Span: 8m/9.6m/12m, bay size: 3.2m/ 4m, section: 4m/ 4.5m. - Gutter: 3-5.5m. e roof vents or double roof vents, controlled by rack and pinion system. - Aluminum sliding doors. Standard export packing