EC21 Buying Leads Catalogs - c purlin http://importer.ec21.com/buy_leads/c purlin.html Need High Tensile Structural Steelshttp://www.ec21.com/offer_detail/Need_High_Tensile_Structural_Steels--8194625.htmlPurlins - High tensile galvanised C purlins Size : 152x64x15.5mm lip 1.5 thick (3.59kg/m) or 152x64x16.5mm lip 1.9mm th20090725