hbgmec roofing C purlin price Standard:Q195,Q215,Q235,Q345 Thickness:0.5mm~4mm Length:6-12m iron Channel beam Size:50-320mm hbgmec roofing C purlin priceStandard:Q195,Q215,Q235,Q345Thickness:0.5mm~4mmLength:6-12m iron Channel beamSize:50-320mm h(mm)b(mm)c(mm)t(mm)8040202.5/310050202.5/312050202.5/312060202.5/312070202.5/314050202.5/316050202.5/316060202.5/31607020 2.5/31805020 2.5/31807020 2.5/ ...