1. Structure and Connects: All hot galvanized, anti rust for 15 to20 years. 2. Covering material: PE, PEP or 1-ply Plastic Film, UV-proof and anti-dust. 3. Ventination: Manual or Auto Optional; Side or Roof Optional. Specifications: Model Span Section Size Height Gutter Height Roof Height Wind Load Snow Load LY8404PL 8m 4m 4m* n 3m/ 3.5m/ 4m 4.5/ 5/ 5.5m 0.4/ 0.5KN/ m2 0.3KN/ m2 LY7425L 7m 4m 4m* n 2.5/ 3/ 3.5m 4.5/ 5/ 5.5m 0.4/ 0.5KN/ m2 0.3KN/ m2