supply of materials- supply of material for day to day maintenance by bricks, stone agg, coarse sand etc at mpl store- mayur vihar ph-ii in ward no. 11-e.- supply of bricks class designation 75 2 supply of coarse sand 3 supply of stone aggregate 10 mm to 20 mm 4 supply of precast rcc grating with frame 50x45x60 cm 5 supply of precast r.c.c. stab / grating 70mm thick manufactured with cc 1:2:4 ( 1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size ) reinforced with 96 kg / m3 of r.c.c including lapping all four side with m.s. sheet 1.6 mm thick. ( drain covers with or without holes )