Construction of R.C.C framed brick boundary wall with erection of Y overhang fixed with concertina coil at top of the boundary wall for a length of 160.00 meters along the existing boundary fence at NHK Gas Offtake point near Digboi Bowser Unloading station.Height of the brick wall is 3.6 m with 700 mm 'Y' overhang. Thickness of the wall is 230 mm. All materials to be supplied by the contractor except cement