... 2.quick construction 3.reliable bearing 4.beautiful apperance...c purlin, material could be Q195 Q235 and so on, any size can be done ... , or fully according to your drawing map c purlin/section steel TYPEc ... SPHD, DIN S185, BS 040, BS A10, BS A185, NF185MATERIALQ195-Q215, Q235PACKINGsurface to be vanished and be packed in bundles, wrapped ...