Defence Research And Development Organisation Tender

Providing, mixing and applying bonding coat of approved adhesive on chipped portion of RCC as per specifications and directions of Engineer-In-charge complete in all respect.

Bars upto 12 mm diameter

Providing and laying water proofing treatment on roofs of slabs by applying cement slurry mixed with water proofing cement compound consisting of applying: (a) after surface preparation, first layer of slurry of cement @ 0.488 kg/sqm mixed with water proofing cement compound @ 0.253 kg/sqm. (b) laying second layer of Fibre glass cloth when the first layer is still green. Overlaps of joints of fibre cloth should not be less than 10 cm. (c) third layer of 1.5 mm thickness consisting of slurry of cement @ 1.289 kg/sqm mixed with water proofing cement compound @ 0.670 kg/sqm and coarse sand @ 1.289 kg/sqm. This will be allowed to air cure for 4 hours followed by water curing for 48 hours. The entire treatment will be taken upto 30 cm on parapet wall and tucked into groove in parapet all around. (d) fourth and final layer of brick tiling with cement mortar (which will be paid for separately. (For the purpose of payment, the plain area only will be measured.)

Asbestos cement sheet

For thickness of 10 mm to 25 mm

Providing, mixing and applying SBR polymer (of approved make) modified Cement mortar in proportion of 1:4 (1 cement: 4 graded coarse sand with polymer minimum 2% by wt. of cement used) as per specifications and directions of Engineer-in-charge. Note: Measurement and payment: The pre-measurement of thickness shall be done just after the surface preparation is completed and Payment under this item shall be made only after proper wet curing has been done and surface has been satisfactorily evaluated by sounding/ tapping with a blunt metal instrument and/or the 75mm size cube crushing strength at the end of 28 days to be not less than 30 N/Sqmm2).

Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

Providing and fixing false ceiling at all height including providing and fixing of frame work made of special sections, power pressed from M.S. sheets and galvanized with zinc coating of 120 gms/sqm (both side inclusive) as per IS : 277 and consisting of angle cleats of size 25 mm wide x 1.6 mm thick with flanges of 27 mm and 37mm, at 1200 mm centre to centre, one flange fixed to the ceiling with dash fastener 12.5 mm dia x 50mm long with 6mm dia bolts, other flange of cleat fixed to the angle hangers of 25x10x0.50 mm of required length with nuts & bolts of required size and other end of angle hanger fixed with intermediate G.I. channels 45x15x0.9 mm running at the spacing of 1200 mm centre to centre, to which the ceiling section 0.5 mm thick bottom wedge of 80 mm with tapered flanges of 26 mm each having lips of 10.5 mm, at 450 mm centre to centre, shall be fixed in a direction perpendicular to G.I. intermediate channel with connecting clips made out of 2.64 mm dia x 230 mm long G.I. wire at every junction, including fixing perimeter channels 0.5 mm thick 27 mm high having flanges of 20 mm and 30 mm long, the perimeter of ceiling fixed to wall/partition with the help of rawl plugs at 450 mm centre, with 25mm long dry wall screws @ 230 mm interval, including fixing of gypsum board to ceiling section and perimeter channel with the help of dry wall screws of size 3.5 x 25 mm at 230 mm c/c, including jointing and finishing to a flush finish of tapered and square edges of the board with recommended jointing compound , jointing tapes , finishing with jointing compound in 3 layers covering upto 150 mm on both sides of joint and two coats of primer suitable for board, all as per manufacturer's specification and also including the cost of making openings for light fittings, grills, diffusers, cutouts made with frame of perimeter channels suitably fixed, all complete as per drawings, specification and direction of the Engineer in Charge but excluding the cost of painting with:

Dismantling water proofing material from the roofs including stacking material within 50 metres lead.

Dismantling aluminium/ Gypsum partitions, doors, windows, fixed glazing and false ceiling including disposal of unserviceable material and stacking of serviceable material with in 50 meters lead as directed by Engineer-in-charge.

Dismantling roofing including ridges, hips, valleys and gutters etc., and stacking the material within 50 metres lead of:

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.

Finishing walls with water proofing cement paint of required shade: Old work (one or more coats applied @ 2.20 kg/10 sqm) over priming coat of primer applied @ 0.80 litrs/10 sqm complete including cost of Priming coat including removing the old damaged paint by scrapping and sand papering and preparing the surface smooth including necessary repairs to scratches etc. all complete.

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per directions of Engineer-in-charge.

12.5 mm thick tapered edge gypsum plain board conforming to IS: 2095- (Part I) : 2011

Providing & Fixing of Armstrong Mineral Fibre Acounstic Suspended Ceiling system with classic level bevelled tegular edge tiles of 16mm thick and armstrong suprafine 15mm face exposed grid having Humidity Resistance (RH) of 99%, NRC 0.55 as per ASTM C423 standard, CAC of 36db as per ASTME1414, light refelctance ≥ 87% as per ASTM E-1477, thermal conductivity k=0.052 - 0.057 W/mk, Colour Global White, fire performance of class 0/1 as per BS476 part 6/7 and Class A as per ASTM E84 with 16mm bevelled tegular edge and 8mm drop in module size of 600 X 600mm (nominal). It shall be suitable for green building application, with recycled content of 32% and having suspension system with 15mm wide T-section flanges colour global white (matching to tile colour) having roll formed double stroke rotary stitching on all T sections i.e., the main runner, 1200mm & 600mm cross tees with a web height of 38mm (all sections) and installation to comprise main runner spaced at 1200mm securely fixed to the structural soffit using Armstrong suspension system (specifications above) at 1200mm maximum. The First/ last armstrong suspension system at the end of each main runner shall not be greater than 450mm from the adjacent wall along with the first and the last main beam shall be at less than 600mm from the wall. Flush fitting 1200mm long cross tees to be interlocked between main runners at 600mm to form 1200 X 600 mm module. Cut cross tees longer than 600mm require independant support. 600 X 600 mm module to be formed by fitting 600mm long flush fittings cross tees centrally between the 1200mm cross tees. Perimeter trim to be Armstrong wall angles of size 3000X19X19 mm, secured to walls using screws at 450mm centre to centre maximum.

Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc., and disposal of debris for all lead and lifts all complete as per directions of Engineer-In-Charge

Providing and inserting 12mm dia galvanised steel injection nipple in honey comb area and along crack line including drilling of holes of required diameter (20mm to 30mm) up to depth from 30mm to 80mm at required spacing and making the hole & crack dust free by blowing compressed air, sealing the distance between injection nipple with adhesive chemical of approved make and allow it to cure complete as per direction of Engineer-In-Charge.

SBR Polymer (@10% of cement weight) modified cementitious bond coat @ 2.2 kg cement per sqm of surface area mixed with specified proportion of approved polymer.

Cleaning of rust from reinforcement bars to give it a total rust free steel surface by using alkaline chemical rust remover of approved make with paint brush and removing loose particles after 24 hours of its application with wire brush and thoroughly washing with water and allowing it to dry, all complete as per direction of Engineer-In-Charge.

Painting with synthetic enamel paint of approved brand and manufacture of required colour to give an even shade: One or more coats on old work including removing the old damaged paint by scrapping and sand papering and preparing the surface smooth.

25 mm average thickness in 2 layers.