channel steel C Purlin 1)Pregalvanized,Hot-dip galvanized and so on 2) ... price 2.quick construction 3.reliable bearing 4.beautiful apperance...c purlin, material could be Q195 Q235 and so on, any ... -2.5MM SHAPE AVAILABLEC shapeSTANDARDASTM A500 Cr.B , AST Cr.C JIS SS330, JIS SPHC, JIS SPHD, DIN S185, BS 040 ...