Repairs to the lift shafts in Bhaskara Building in TIFR Housing Complex,Colaba,Mumbai

PART A

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.

Note :- Rates for external plaster for height upto 10m from ground level in less otherwise stated. CEMENT PLASTER (IN FINE SAND) :20 mm cement plaster of mix 1:4 (1 cement: 4 fine sand)

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 : 50mm 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

Drilling suitable holes in reinforced or plain cement concrete with power driven drill machine to a minimum depth of 75 mm in RCC beams, lintels, columns and slabs to introduce steel bars for sunshades/balconies including fixing the steel bars in position using epoxy resin anchor grout of approved make but excluding the cost of reinforcement, all complete as per direction of Engineer-In-Charge. : Upto and including 12mm dia.

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). :

25 mm average thickness in 2 layers.

50 mm average thickness in 3 layers.

Centering and shuttering including strutting, propping etc. and removal of form for :Columns, Pillars, Piers, Abutments, Posts and Struts

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete above plinth level. :Thermo-Mechanically Treated bars of grade Fe-500D or more.

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.

Jacketing with Microconcrete (MasterEmaco S 346 of BASF, Dr Fixit, Fosroc, SikaRep Microcrete-4 or of equivalent make /brand) as approved by Engineer In Charge for pouring the concrete in shutttering mould of jacket excluding the cost of reinforcemnet, bond coat, shear key, core cutting, centering and shuttering and finishing at all floors and at all levels etc. complete as per the direction of the Engineer In Charge. ( In pilasters, buttresses, plinth and string courses, fillets, columns, beams, pillars, piers, abutments, posts and struts, Suspended floors, roofs having slope up to 15° landings, balconies, shelves, chajjas, lintels, bands, plain window sills, staircases and spiral stair cases above plinth level up to floor five level. etc) payment to this work wll be made as per actual quantum of materials consumed at site

Providing , supplying and erecting double bamboo scaffolding with wooden ballies of the required length as supports , horizontal work platform with steel plate / safe means of platform , all accessories , kathyas etc. to aid repair and structural repair works .

Providing, supplying and fixing in position , Stainless steel wire mesh 0.8 mm thk and pitch of 15 mm c/c to the plastered surface with nails etc completed as directed.

PART B

Any unforeseen item not covered above, executed from CPWD Delhi Schedule of Rates 2021 upto a base value of Rs. 169312/- Hint: Bidder is supposed to quote rate for this item in column (green) at value which is at a certain percentage above or below the rate of DSR 2021. For e.g. if the estimated rate is Rs.169312/- then bidder should quote rate of Rs. 1,86,243/- incase he intends item in this part to be paid at the rate of 10% above DSR 2021 or Rs. 1,52,381/- incase he intends item in this part to be paid 10% below the DSR 2021. The value given in the rate for this item shall be used to derive the rate to be paid for the item from DSR 2021

HARI OM CONSTRUCTION

Oriental Integrated Facility Management Pvt Ltd