supply of material at store by pdg. precast slab, manhole cover with frame and ms grating in ward no- 48e subhash mohalla shah ( n ) zone.- precast r.c.c. slab / grating 70mm thick manufactured 2 supply and stacking pre-cast r.c.c. manhole cover and frame of required shape and approved quality ( d ) hd-20 ( 1 ) circular shape 560 mm internal diameter 3 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.