Specification Grade: Q195-Q345/SPCCThickness: 1.5-5.0mmDepth: 40mm-450mmSurface: Black or Galvanized or Color PaintingApplicationsThe Z shaped purlins have excellent anti bending property and are easy to install. They are widely used as the supporter of roof and wall in larg-scale and midscale construction, such as factory, warehouse, garage, exhibition center,cinema, theatre, garden and so on.AdvantageEasy to assemble and dismantle; Ecofriendly material: can be used for several times and can be recycled; Shorter construction period, longer using time; High strength and stiffness, high weight bearing