imp./dev. of drainage system by pdg. m s gratings in c & b blockinyamuna viharward 232 shah.(n) zone.- imp./dev. of drainage system by pdg. m s gratings in c & b blockinyamuna viharward 232 shah.(n) zone., dsr dar civil-2018 and approved items; ms grating 2 15.2.1:demolishing cement concrete manually / by mechanical means including disposal of material within 50 metres lead as per direction of engineer - in-charge.nominal concrete 1:3:6 or richer mix (i/c equivalent design mix) 3 6.1.2:brick work with common burnt clay f.p.s (non modular) bricks of class designation 7.5 in foundation and plinth in:cement mortar 1:6 (1 cement : 6 coarse sand) 4 4.1.3:providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - all work up to plinth level:1:2:4 (1 cement : 2 coarse sand (zone-iii) derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources) 5 13.4.1:12 mm cement plaster of mix:1:4 ( 1 cement : 4 coarse sand) 6 13.18:neat cement punning 7 10.25.2:steel work welded in built up sections/framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer using structural steel etc. as required.in gratings, frames, guard bar, ladder, railings, brackets, gates and similar works 8 110.12:p/f 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 & fixing in position complete. (drain covers with or without holes) 9 15.60:disposal of building rubbish/ malba/ similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by engineer-in-charge, beyond 50 m initial lead, for all leads including all lifts involved