supply of material supply of gully grating, slabs, manholes for day to day maintenance of the area in ward no. 67, paschim vihar / kpz. , supply and stacking of precast r.c.c grating with frame 500x450 mm horizontal grating at mpl. store , supply and stacking of circular shape 560 mm dia precast r.c.c manhole cover with frame hd-20 at mpl. store , supplly and stacking precast r.c.c. slab / grating 70mm thick manufactured with cc 1:2:4 ( 1 cement :2 coarse sand : 4 graded stone aggregate 20 mm nominal size ) reingorced with 96 kg / m3 of rcc i / c lapping all four side with m. s. sheet 1.6 mm thick & fixing in position complete. ( drain covers with or without holes )