Details: construction of manholes using sulphate resistant cement at various depths to invert including earthwork excavation as per ss 20b, laying cement concrete in c.m. 1:3:6 using 40mm b.g.jelly for foundation, sinking well kerb below g.l. for 4.5m depth and above, pumping, timbering charges for 2.5m depth and above, stock brick work in c.m. 1:3, for 23cm thick wall and over 23cm thick wall, plastering interior with c.m. 1:3, 20mm thick and exterior with c.m. 1:3, 12mm thick, laying plain cement concrete 1:3:6 using 12.0mm to 20mm b.g.jelly fixing the frame, providing c.i. steps, manhole cover and frame, benching and channelling including refilling the trench with excavated earth and disposal of surplus earth etc. complete for the following sizes for each manhole (as per the type design drawing for manholes). - 1.50m depth manhole 3.50m depth manhole earth work excavation in all kinds of soils except hard rock requiring blasting, inclusive of shoring, strutting and baling out water wherever
Sector: Municipality