... .Good anti-bending performance 3.Good straightness 4.Reliable performance C/Z type channel steel purlins features : Standard:AISI, ASTM, ... , DIN, GB, JISGrade:Q215,Q235,A36,SS400,SS540Commoditystructural steel C/Z type channel steelShapeC/Z ChannelModel Numberh:80mm-400mm,w ... after-sales service as one of the major color plate steel and structure of the group company."For quality observing contract and ...