Exterior repair and renovation works at Balmer Lawrie Rear Office Building Complex(ROBC) in Kolkata, West Bengal

Name of Work : Repair Renovation and miscellaneous interior work at Balmer Lawrie Rear Office Building Complex (ROBC) in

Kolkata, West Bengal.

Srl No DSR -2023 Description Qty Unit Rate (Rs.) DSR- 2023

Ref. No. Amount (Rs.)

1.0 Scaffolding work :

1.01 14.72 Providing and fixing double scaffolding system (cup lock type) on the exterior side,

up to seven story height made with 40 mm dia M.S. tube 1.5 m centre to centre,

horizontal & vertical tubes joining with cup & lock system with M.S. tubes, M.S.

tube challies, M.S. clamps and M.S. staircase system in the scaffolding for working

platform etc. and maintaining it in a serviceable condition for the required

duration as approved and removing it there after. The scaffolding system shall be

stiffened with bracings, runners, connection with the building etc wherever

required for inspection of work at required locations with essential safety features

for the workmen etc. complete as per directions and approval of Engineer-in-

charge. The elevational area of the scaffolding shall be measured for payment

purpose. The payment shall be made once irrespective of duration of

scaffolding.Note: - This item to be used for maintenance work judicially, necessary

deduction for scaffolding in the existing item to be done.

1.02 26.81 Providing and fixing Scaffolding net of required width made of high density

Polyethylene UV stabilized knitted on warp knitting machines having density

100grams/sqm and shading coefficient minimum 75% around the construction

site/ for vertical extension as per requirement including fastening/tying with

uilding/scaffolding pipes or with any other fixtures etc. complete as per direction

of Engineer-in-Charge. (One time payment shall be made for providing Scaffolding

net from start of work till completion of work including shifting if any. The

Scaffolding net shall be the property of the contractor on completion of the work

1.03 26.36 Providing, erecting, maintaining and removing temporary protective screens made

out of specified fabric with all necessary fixing arrangement to ensure that it

remains in position for the work duration as required by the Engineer-in-charge.

2.00 Demolishing works : -

2.01 15.56 Dismantling old plaster or skirting raking out joints and cleaning the surface for

plaster including disposal of rubbish to the dumping ground within 50 metres lead.

2.02 M.R. Carefully Demolishing existing Stone-cladding in external walls upto any height,

including stacking of unserviceable material to a place within 50 metres lead.

2.03 26.28 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

direction of Engineer-In-Charge -

3.00 Repairs to Damaged & Crack walls : -

3.01 26.29 Cleaning of reinforcement from rust from the reinforcing 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. -

3.02 26.31 Providing, mixing and applying bonding coat of approved adhesive on chipped

portion of RCC as per specifications and direction of Engineer-In-charge complete

in all respect. -

3.02.1 26.31.1 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

3.02.2 26.31.2 Epoxy bonding adhesive having coverage 2.20 sqm/kg of approved make.

Srl No DSR -2023 Description Qty Unit Rate (Rs.) DSR- 2023

No. Providing, mixing and applying SBR polymer (of approved make) modified Cement Amount (Rs.)

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). -

3.03.2 26.32.2 25 mm average thickness in 2 layers. 990.00 Sqm 587.35 5,81,476.50

3.03.3 26.32.3 50 mm average thickness in 3 layers. 660.00 Sqm 1174.70 7,75,302.00

3.04 26.35 Providing and injecting approved grout in proportion recommended by the

manufacturer into cracks/honey-comb area of concrete/ masonry by suitable

gun/pump at required pressure including cutting of nipples after curing etc.

complete as per directions of Engineer-in- Charge. (The payment shall be made on

the basis of actual weight of approved grout injected.)

3.04.1 26.35.2 Stirrer mixed SBR Polymer (of approved make) modified Cement slurry made with

Shrinkage Compensating Cement in concrete/RCC work. 200.00 Kg 124.00 24,800.00

CEMENT PLASTER (IN COARSE SAND) -

3.05 13.5 15 mm cement plaster on rough side of single or half brick wall of mix : -

PUTTY WORKs : -

3.06 13.80 Providing and applying white cement based putty of average thickness 1 mm, of

approved brand and manufacturer, over the plastered wall surface to prepare the

surface even and smooth complete. 3300.00 Sqm 156.05 5,14,965.00

Centering & Shuttering Works : -

4.02 5.9 Centering and shuttering including strutting, propping etc. and removal of form

4.02.1 5.9.16 Edges of slabs and breaks in floors and walls -

5.00 External Painting : -

5.01 13.45 Finishing walls with textured exterior paint of required shade : -

5.01.1 13.45.1 New work (Two or more coats applied @ 3.28 ltr/10 sqm) over and including

priming coat of exterior primer applied @2.20kg/10 sqm. 3300.00 Sqm 223.60 7,37,880.00

6.00 Disposal of building rubbish / malba : -

6.01 15.60 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.

Rain water pipes

8.04 12.41 Providing and fixing on wall face unplasticised Rigid PVC rain water pipes

conforming to IS : 13592 Type A, including jointing with seal ring conforming to IS :

5382, leaving 10 mm gap for thermal expansion, (i) Single socketed pipes.

8.04.1 (i)Single socketed pipes. -

8.05 12.42 Providing and fixing on wall face unplasticised - PVC moulded fittings/accessories

for unplasticised Rigid PVC rain water pipes conforming to IS 13592 Type A,

including jointing with seal ring conforming to IS : 5382, leaving 10 mm gap for

thermal expansion. -

8.06 12.43 Providing and fixing unplasticised -PVC pipe clips of approved design to

unplasticised - PVC rain water pipes by means of 50x50x50 mm hard wood plugs,

screwed with M.S. screws of required length, including cutting brick work and

fixing in cement mortar 1:4 (1 cement : 4 coarse sand) and making good the wall

etc. complete. -

8.07 12.44 Providing and fixing to the inlet mouth of rain water pipe cast iron grating 15 cm

diameter and weighing not less than 440 grams. 18 Each 54.70 984.60

Aluminium windows -

Srl No DSR -2023 Description Qty Unit Rate (Rs.) DSR- 2023

21.1No. Providing and fixing aluminium work for doors, windows, ventilators and Amount (Rs.)

partitions with extruded built up standard tubular sections/appropriate Z sections

and other sections of approved make conforming to IS: 733 and IS : 1285, fixed

with rawl plugs and screws or with fixing clips, or with expansion hold fasteners

including necessary filling up of gaps at junctions, at top, bottom and sides with

required PVC/neoprene felt etc. Aluminium sections shall be smooth, rust free,

straight, mitred and jointed echanically wherever required including cleat angle,

Aluminium snap beading for glazing / paneling, C.P. brass / stainless steel screws,

all complete as per architectural drawings and the directions of Engineer-in-

charge. Glazing and paneling to be paid for separately) :

7.06.1 21.1.1 For fixed portion. -

7.06.1.1 21.1.1.2 Powder coated aluminium (minimum thickness of powder coating 50 micron)

7.06.2 21.1.2 For shutters of doors, windows & ventilators including providing and fixing hinges/

pivots and making provision for fixing of fittings wherever required including the

cost of EPDM rubber / neoprene gasket required (Fittings shall be paid for

separately). -

7.06.2.1 21.1.2.2 Powder coated aluminium (minimum thickness of powder coating 50 micron)

Providing and fixing glazing in aluminium door, window, ventilator shutters and

partitions etc. with EPDM rubber / neoprene gasket etc. complete as per the

architectural drawings and the directions of engineer-in-charge .

(Cost of aluminium snap beading shall be paid in basic item):

With float glass panes of 5.5 mm thickness (weight not less than 12.50 kg/sqm)

Grand Total ( For External Repairing & Renovation works.) = A Rs. 1,06,53,249.95

Grand Total ( For External Repairing & Renovation works.) = A Rs. 1,06,53,249.95

Add Cost Index as per CPWD Office Memorandum no. 34(1)/SDG(Kol)/Cost

Index/2025/1316 dated 27.08.2025 @ 22% for Kolkata (a*1.22) = B

Cost i/c GST after Multiplication with multiplying factor 0.973 as per CPWD

circular vide no. 158/SE(TAS)/GST/2024/02-E dated 08.08.2024 on DSR items = Rs. 1,26,46,046.89