... 2.Grade:Q235, Q345 3.Width: 80mm to 300mm 4.Material: Galvanized/prepaintZ steel purlin, C purlin and H beam ... steel, Z section steel is roll-formed from galvanized steel, specification to be complete.3) Make from quality raw material ... 0.5mm to 15mmMaterialQ235,Q195,Q345Sizelength,width,thickness,height can manufacture as you requestSurface Treatmenthot dipped galvanized,electrogalvanizing,spray ...