tender for raising the height of existing drains in the areas of a b c type quarters and other locations at nitw.; 1 brick work with non-modular fly ash bricks conforming to is:12894, class designation 10 average compressive strength in super structure above plinth level up to floor v level in : cement mortar 1:4 (1 cement : 4 coarse sand) 2 12 mm cement plaster of mix 1:4 (1 cement: 4 fine sand) 3 repairs to plaster of thickness 12 mm to 20 mm in patches of area 2.5 sq.meters and under, including cutting the patch in propershape,raking out joints and preparing and plastering the surface of the walls complete, including disposal of rubbish to the dumping ground, all complete as per direction of engineer-in-charge. with cement mortar 1:4 (1 cement : 4 fine sand) with cement mortar 1:4 (1 cement : 4 fine sand) 4 providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - all work up to plinth level : 1:1½:3 (1 cement: 1½ coarse sand (zone-iii) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources) 5 supplying and stacking at site moorum 6 spreading ofavailable good earth present at the siteincluding watering and compacting manuallyand preparation of the surface as directed by the engineer-in-charge.(rate considered as dsr 2.25)