... -bending performance 3.Good straightness 4.Reliable performance C/Z type channel steel purlins features : Standard:AISI, ASTM, ... JISGrade:Q215,Q235,A36,SS400,SS540Commoditystructural steel C/Z type channel steelShapeC/Z ChannelModel Numberh:80mm-400mm,w:40mm-80mmPerforated ... Application:purlin and wall beam of steel structure buildingC/Z type channel steel purlins advantage:(1). Design according to ...