Metal Roof Solar Mounting System Solar Hanger Bolt Solar L Feet ,Parts have been high pre-assembly on factory to save your installation time.Install in Trapezoidal and corrugated sheet metal. Height adjustable via elongated hole in the sheet metal bracket. Low fitting costs Every size of module array possible Height adjustable via elongated hole in the sheet metal bracket Suitable for large distances between rafters    Installation Site Trapezoidal and corrugated sheet metal Fastening Riveted or screwed onto raised corrugated Economic layout Landscape/portrait    Max Wind Speed < 60m/s    Snow Load < 80cm    Standards AS/NZS 1170, DIN 1055, JIS C 8955:2011     Material Anodized aluminum 6005 T6 , Fasten bolt and nut stainless steel 304     Anti-corrosive  Anodized     Warranty / Duration  12 years/ More than 25 years