Profile: J.K.H. Drainage Units Ltd. manufactures steel reinforced pre-cast concrete products with applications ranging from land drainage and waterway management to building construction & civil engineering. Our product line includes drainage outfalls, erosion protection channels, concrete products, silt traps, inspection chambers, culvert end walls / earth retaining structures and gratings & vermin gates. Our concrete products contain trench bridging beam. It is strongly reinforced concrete beam designed to carry drain runs across unstable areas of ground. It is particularly suitable for reinstating drains during the excavation of major pipe lines.