Althon has new range of precast concrete Box Culvert Headwalls to suit a maximum internal box culvert of 2650mm wide x 1750mm high.

All Althon’s CSP Culvert headwalls can be factory fitted with gratings, flap valves, Kee Klamp® handrail, penstocks and other flow control devices. Toe depths are also available up to 1000mm and come in thickness of 300 or 500mm.