Cast in Situ Cement Concrete M 20 Kerb with Channel Providing and laying cement concrete Kerb with channel with top and bottom width 115 and 165 mm respectively, 250 mm high in M 20 grade PCC on grade foundation 150 mm thick, Kerb channel 300 mm wide, 50 mm thick in PCC grade, sloped towards the Kerb, Kerb stone with channel laid with Kerb laying machine, foundation concrete laid manually, all complete as specification.