INFRASTEEL™ is a steel liner for culvert rehabilitation that can be manufactured to specific shapes and sizes. Our steel liner can be produced in arched, elliptical, and round shapes as well as unusual shapes. The custom designed sizes range from 26" to over 240" in diameter and can be up to 2” thick. Standard round sizes 42" and smaller are available from stock. Once installed, the steel slip liner improves hydraulic capacity and the structural integrity of the existing culvert structure.