tender for c/o 80 meter rcc retaining wall for 240 men barrack behind cook house of gc crpf silchar, assam.; 1 preparation of architecutral & structural drawings of the structure and carrying out the soil investigation tests from nabl approved lab duly taking into account the existing buildings. contractor shall submit the drawings duly vetted by iit/nit within 30 days of award of work order. drawings shall be got approved by the estate officer before start of the work.note : contractor has to ensure that there is no damage to the existing buildings and if any, same shall be got repaired by the contractor at his own cost. 2 earth work in excavation by mechanical means (hydraulic excavator) / manual means over areas (exceeding 30cm in depth, 1.5m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth, lead up to 50m and lift up to 1.5m,as directed by engineer-in-charge : all kinds of soil. 3 filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 m and lift up to 1.5 m. 4 providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - all work up to plinth level : 1:5:10 (1 cement : 5 coarse sand(zone-iii) : 10 graded stone aggregate 40 mm nominal size). 5 making plinth protection 50mm thick of cement concrete 1:3:6 (1 cement : 3 coarse sand : 6 graded stone aggregate 20 mm nominal size) over 75mm thick bed of dry brick ballast 40 mm nominal size, well rammed and consolidated and grouted with fine sand, including necessary excavation leveling and dressing and finishing the top smooth. 6 providing and laying in position machine batched and machine mixed design mix m-25 grade cement concrete for reinforced cement concrete work, using cement content as per approved design mix, including pumping of concrete to site of laying but excluding the cost of centering, shuttering, finishing and reinforcement, including admixtures in recommended proportions as per is: 9103 to accelerate, retard setting of concrete, improve workability without impairing strength and durability as per direction of engineer-in-charge. (note :- cement content considered in this item is @ 330 kg/cum. excess/ less cement used as per design mix is payable/recoverable separately) : all works upto plinth level. 7 centering and shuttering including strutting, propping etc. and removal of form for : foundations, footings, bases of columns, etc. for mass concrete. 8 centering and shuttering including strutting, propping etc. and removal of form for : walls (any thickness) including attached pilasters, butteresses, plinth and string courses etc. 9 steel reinforcement for r.c.c. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level : mild steel and medium tensile steel bars. 10 half brick masonry with common burnt clay f.p.s. (non modular) bricksof class designation 7.5 in foundations and plinth in : cement mortar 1:3 (1 cement : 3 coarse sand) 11 providing and fixing on wall face unplasticised rigid pvc rain water pipes conforming to is : 13592 type a, for weep hole & placing in rcc retaining wall during construction including cuttin of required size/shape, placing,& finishing etc. complete as per direction of engineer incharge : 75 mm diameter. 12 12 mm cement plaster finished with a floating coat of neat cement of mix : 1:3 (1 cement: 3 fine sand).