... tunnels bridges,valve basement systems,sewage systems,subways,retaining walls High ribbed formwork formwork mesh, hot-dipped galvanized steel sheets, Size(length*width ... engineering works and high rise building projects and non-regular or bending pattern etc. as concrete permanent assembly-free formwork. Specification: Size ... ×450mm0.453.802200mm×450mm0.504.202200mm×450mm0.604.80 High Ribbed Formwork