56 /CD-II/BSNL/Kol/2025-26

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.

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.

12 mm cement plaster of mix :

1:4 (1 cement: 4 fine sand)

Extra for providing and mixing water proofing material in cement plaster work in proportion recommended by the manufacturers.

Finishing walls with water proofing cement paint of required shade :

New work (Two or more coats applied @ 3.84 kg/10 sqm).

Applying priming coat :

With ready mixed red oxide zinc chromate primer of approved brand and manufacture on steel galvanised iron/steel works

Painting with synthetic enamel paint of approved brand and manufacture to give an even shade :

Two or more coats on new work.

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

50 mm average thickness

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.

Bars upto 12 mm diameter

Bars above 12 mm diameter

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.

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

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).

50 mm average thickness in 3 layers.

Labour for tightening of all the nuts and bolts ,washers and spring washers of towers i/c mounts, platforms, vertical cable tray, horizontal Cable tray ,climbing ladders etc all with Torque wrench etc including pasting of zinc rich paste wherever galvanised coat has peeled off etc all complete and as per the directions of the Engineer-in-charge. Note :- The rate of this item shall include the cost of all labour for fixing of new nuts & bolts, missing members including arrangement of T&P, torque wrench, other equipments etc required for all operations specified above i/c scaffolding, safety belt, insurance of labour etc at site. However cost of nuts & bolts & any missing members will be paid separetely.

Roof Top Tower upto 12.00 M height

40M height ground based tower

Supplying at site missing galvanised M.S tower materials Viz leg,bracing,splice plate,wave guide rack,ladder,railing.antenna fixures etc made of M.S angles,flats,channels,pipes,plates. Bolts & nuts , plain and spring washers.etc with average mass of zinc coating of 610 gm/sqm (approximately 85 micron) as per requirement.The structural steel section of M.S. angles.Tees and plates etc shall conform to IS : 226 & IS : 808 and grade YST 250 as per 2062-2011.Hot deep galvanisation shall conform to 4759-1996 and 2629-1985 and nuts & bolts grade 5.6 as per IS : 6639-2005 and washers shall be of IS : 6610-1972.

40M height ground based tower

Painting two or more coats with high gloss synthetic enamel paint of approved brand and colour (International white and orange) over one coat of Zinc cromate primer or eqiavelent of approved brand and manufactures and as per recommendation of International Civil Aviation rules in Galvanized structural steel tower/RTT/pole tower. (NOTE: Rate includes painting of tower, platform, antenna mount, ladder, vertical tray, horizontal tray, run way post etc & taking all safety measure during paintind all complete as per direction of the Engineer-in-charge.]

Roof Top Tower upto 12.00 M height

40M height ground based tower

Applying anti-rust passive coating (like Sika Rustop or equivalent) over reinforcement bars after thorough cleaning of reinforcement complete as per direction of Engineer-in-charge.

Up to 25 mm dia bars

Credit value for dismantled /unserviceable materials

Galvanised M S materials