Carrying out special repairs to sunshades and external walls in Kalpakkam Township.

Propping and supporting the structural members and its adjoining areas with steel props (adjustable or as required), bracings, steel/timber runners etc to relieve the structural member of the required load coming over it as per the pattern given by the contractor & approved by Engineer-in-charge complete.

Providing and fixing double scaffolding system (cup lock type) on the exterior side at all height made using 40mm diameter M.S. tube spaced @ 1.5m center to center at both horizontal and vertical joining with cup and lock system with M.S.tube, M.S.tube challies, M.S clamps and M.S staircase system in the scaffolding for working platform etc., including maintaining it in a serviceable condition for the required duration as approved, removing after completion of repair works, the scaffolding system shall be stiffened with bracings, runners connection with the building, etc., wherever required for essential safety features for the workmen, etc., all complete as directed by Engineer-in-charge. Note: 1) The elevational area of the scaffolding shall be measured for payment purpose. The payment will be made once irrespective of duration of scaffolding. 2) The buildings are of Ground+ 2 storeyed structure and the contractor has to observe all safety procedure while working on heights as per I.S. 3696 (Part-I) - 1987. (Safety Code for scaffolds). 3) All working platform must be of minimum 600 mm wide, made of M.S pipe and must have guard rails as per specification. 4) Screen of suitable material shall be provided to the full height of scaffolding and securely tied to protect falling objects coming out during the repair work is in progress. 5) To protect workers on lower platform against falling objects from higher level over head protection should be provided on the scaffolds. 6) Necessary aluminium/ M.S. ladder shall be provided at the cost of the contractor, to the full height of scaffolding at required location around the building to enable Departmental Supervisor/Engineer climb up and closely watch the repair work of the building.

Providing and laying Cementitious water proofing treatment system comprising of bond coat, top screed concrete including preparation of surface by chipping/dismantling the existing loose surfaces/ roof tiles with bed mortar, cleaning the surface by washing throughout, filling the cracks using approved crack fillers, injection/ grouting the cracks where ever required with cement slurry using suitable water proofing admixtures, applying bond coat, finishing the top with 20mm thick IPS flooring with water proofing admixtures, leak test, curing, etc., all complete as per specifications and as directed by the Engineer-in-Charge. Note:- i) Cost of dismantling the existing tiles and bed concrete, grouting the cracks if any required will be paid separately under relevant item. ii) This treatment should be done by an agency specialized in the job having sufficient knowledge of waterproofing treatment, authorized trained applicator should be used and certificate should be submitted before commence the work. iii) This work shall be executed at inaccessible terrace at a height of upto 11m. Aluminium mobile tower scaffolding having double width platform with stairway as directed by EIC shall be provided by the contractor to access the working area during execution of work. iv) Five years guarantee from the date of completion of maintenance period shall be given by the contractor in the prescribed format of the department for the workmanship and the materials provided. v) 50% (Fifty percent) of security deposit will be retained as performance security for the guarantee period and the same will be released after successful completion of the guarantee period i.e., after five years to be reckoned from the date after the maintenance period prescribed in the contract.

Providing, cutting, bending, placing and binding steel reinforcement using TMT bars of Fe-500 / Fe-500D grade in all reinforced cement concrete works including preparation of bar bending schedules, cutting, bending, fixing, tieing in position with 1.6 mm dia soft drawn annealed binding wire, welding of reinforcement to existing steel reinforcement/ shear connectors, cost of cover blocks in C.M 1:2, etc., complete as per specifications and as directed by Engineer-In-Charge. Important Note: The required quantity of steel reinforcement as mentioned in the schedule should be procured by the contractor only of SAIL, Rashtriya Ispat Nigam Limited (VIZAG), TATA Steel & JINDAL from authorised dealers which shall conform to IS: 1786 (Latest Edition).

Chipping of unsound/weak reinforced cement concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type of approved make at all lifts including tapering of all edges, making square shoulders of cavities, cleaning the exposed concrete surface and reinforcement with wire brushes, disposal of debris within 2 Km lead, etc., all complete as directed by Engineer-In-Charge.

Upto 25mm average thickness

Above 25mm and upto 50mm average thickness

Providing anti corrosive treatment to steel reinforcement by removing the rust from corroded reinforcement and applying anti-corrosive chemicals as details below including cleaning of reinforcement from rust to give it a total rust free steel surface by using alkaline chemical rust remover with paint brush, removing loose particles after 24 hours of its application with wire brush, thoroughly washing with water and allowing it to dry, applying anticorrosive coating, etc., all

Bars upto 12 mm diameter

Providing and fixing of 10mm dia shear connectors/ steel reinforcement in reinforced or plain cement concrete by drilling 12mm dia holes at 1mtr c/c or as specified with power driven drill machine to a minimum depth of 75mm and upto 200mm in RCC beams, lintels, columns and slabs to introduce steel bars/ shear connectors including drilling holes, fixing the steel bars in position using epoxy resin anchor grout of approved make, etc., all complete as directed by Engineer-In-Charge. (Note : The cost of steel reinforcement will be paid for seperately under relevant item)

Repairs to damaged RCC structural members at all locations and all lifts using SBR Polymer modified plain/ reinforced cement concrete for structural members having minimum characteristic compressive strength [with ordinary portland cement, coarse sand and graded stone aggregate of 10mm maximum size in proportion as per design criteria] with specified average thickness including preparing the dismantled concrete surface by hacking the surface for better adhesion, treating the exposed steel reinforcement using approved chemicals, providing additional reinforcement, if any required, applying bond coat, filling/plastering with polymer modified concrete repair mortar in layers using approved polymers, curing, cleaning of floor/windows thoroughly on completion of repair work etc., all complete as per specifications and as directed by the Engineer-in-Charge. (Note:- Cost of additional reinforcement, shear keys, form work and anticorrosive treatment will be paid for separately under relevant item)

40mm average thickness

Repairs to internal/ external plastering over brick work/ concrete at all locations and all lifts using Polymer modified cement repair mortar including preparing the surface by hacking the surface for better adhesion, applying bond coat, providing glass fibre mesh or chicken reinforcement, if any required, applying bond coat, filling/plastering with polymer modified repair mortar in layers using approved polymers, curing, cleaning of floor/windows thoroughly on completion of repair work etc., all complete as per specifications and as directed by the Engineer-in-Charge.

20mm average thickness - Plain plaster

19mm average thickness Rough cast plaster (7 mm thick rough cast in C.M 1.3 using 6 mm and below size granite chips over 12 mm thick base coat)

Disposal of surplus excavated earth / Debris by collecting, loading, transporting by mechanical means and unloading them at places as shown by the Department within a lead specified below and levelling, etc., all complete as per specifications and as directed by the Engineer-in-Charge. Note: 1) The rates in respect of this item are applicable for the NET Quantities arrived at after making deductions for voids @ 20% in respect of soil and @ 50% in respect of rock from the corresponding stack / truck measurements. 2) The earth shall be dumped well inside the dumping yard and not over approach pathway road.

Repairs to the wall and ceiling cracks by cutting 'V' shaped grooves and filling with crack seal compound of make Asian (Smart care crack seal) or other approved crack seal compounds including cleaning the grooves treat the crack with primer, apply two coats of crack seal using spatulla or putty knife, finishing the surface, etc., all complete as per specification and as directed by the Engineer-in-charge.

Providing painting over all exposed surfaces at all heights over rough cast/plain plaster with one coat of premium exterior emulsion paint of make Asian (APEX - DUST PROOF) or other approved equivalent make of approved shade or match with existing shade over the coat of Highly flexible cementious two component coat water proofing treatment system over the coat of bond coat including making surface free from dirt/oil/other materials by scrapping the surface, removal of loose / cracked mortar, filling the cracks using approved crack fillers, filling/injection/ grouting the cracks/joints where ever required with polymer modified cement mortar using admixtures all complete as detailed below as per manufacturer specifications and as directed by the Engineer-in-Charge.

Painting all internal faces of walls / plastered surfaces with Two coat of Interior Emulsion paint of make Asian (Tractor) / Berger (Bison) or other approved equivalent make of approved shade over a coat of primer of make Asian (Professional) / Berger (BP Primer) or other approved equivalent make including preparation of surfaces by scrapping the existing white wash / colour wash using scrapping / sanding machine with dust free vacuum collection system, cleaning the existing white wash/colour wash area, roughening the surface, washing the area thoroughly with lime and soda mix or other approved chemical using high pressure washer, preparing the surface dust free for applying the primer coat, applying approved make wall care putty to make surface smooth without porous by using putty knife and sand papers, the dust accumulated during scraping shall be collected in appropriate dust bin collector/ equipment and disposed with in 2Kms lead, etc., all complete as per specification and as directed by Engineer-in-charge. (Note: The sample shall be got approved by the EIC before making bulk order.)

Providing Painting over all exposed surfaces at all heights over rough cast plaster / plain plaster with Two Coat of premium exterior emulsion paint of make Asian (APEX - Dust proof exterior emulsion) / Berger (Weather coat smooth) or other approved equivalent make of approved shade over a coat of exterior wall primer of make Asian / Berger or other approved equivalent make including preparation of surfaces by scrubbing / cleaning the fungus / stains, cleaning with water, filling the cracks with approved crack filler and including cost of all materials, labour, tools and plants, curing, scaffolding at all lifts, etc., all complete as per specifications and as directed by Engineer-In-Charge. Note:- The samples should be got approved by the EIC before placing.

Painting over Plain Plaster at all lifts.

Painting over Roughcast Plaster at all lifts.

Rectifying the leakages in water supply pipe line of various sizes by removing the damaged portion of GI pipe and replacing with new GI pipes upto 200mm long including cost of GI pipes of medium class of make "Tata" bearing ISI mark as per IS standard, GI specials such as Coupling, Nipple, Tee, bend, elbow, reducer, union, etc., cutting, threading and jointing with white lead, painting two coats of synthetic enamel paint over a coat of red oxide primer, making necessary opening/chasing of the wall, flooring, etc., fixing with GI clamps over Teakwook plugs, Teakwood packing pieces and screws wherever required and restoring same to its original condition, including cost of the cement required for the work etc. complete all as directed.

15mm to 50mm

Refixing the following sizes of existing GI/ CPVC/ Composite pipe line which have come out from its original position due to decay of teak wood plug/ packing piece, rusted GI clamps including fixing with new Teak wood plug/ packing piece, new GI clamp with necessary screws, etc. all complete as directed by Engineer.

Upto 25mm dia pipe

Above 25mm dia pipe

Providing and fixing best quality 110mm dia SWR uPVC pipes - Type A (suitable for ventilation work and rain water applications) conforming to IS: 13592 - latest edition with ISI mark including moulded fittings/specials such as bends, shoes, etc., jointing with seal ring conforming to IS - 5382 leaving 10mm gap for thermal expansion, fixing to the wall with adequate no. of PVC clips for rain water down take pipes etc., all complete as per specifications and as directed by the Engineer in charge.

Upto 1 Km or part thereof

Dismantling of old plastering / skirting including raking out the joints, cleaning the surface for plastering, disposal of debris within a initial lead of 50m, etc., all complete.

Title

General Note

General Information for guidance of tenderers

Conditions for Cement & Steel

Schedule of Quantities

The schedule of quantities is to be read for the purpose of pricing in conjunction with the special conditions, general rules for the guidance of contractors, conditions of contract, specifications, drawings, schedule of supply of materials and the appendices.

The prices inserted in the schedule of quantities shall be inclusive of value of the work described including all cost and expenses, which may be required in and for the construction of the work described together with the general risks, liabilities and obligations not forth or implied in the documents on which the tender is to be based.

The quantities stated are to be considered approximate only and the unit prices entered in the schedule of quantities and prices shall apply only to the actual quantities measured in the completed work in accordance with the specifications.

All the materials other than those shown in schedule of supply of materials in section VII are to be arranged by the contractor and his rates should account for the same.

Rates quoted for all items in this tender shall include cost of all materials including cement and steel. Department will not supply any materials other than materials stipulated in Section - VII of the tender and as such the rates quoted must be all inclusive.

If contractors need any clarification they are required to contact the ‘Head, CTC, CEG, GSO, Kalpakkam – 603 102, Chengalpattu district, Tamilnadu (Ph – 044 - 27481238 and 044-27480500 Extn. 84727, 85803) during office hours.

The contractor shall be responsible for supply of cement and procure Ordinary Portland Cement conforming to IS 269-2015 / Portland Pozzolona Cement conforming to IS: 1489-2015 and use it on works. Since the supply of cement by the department has been dispensed, all the clauses relevant to supply of cement by department in this tender document stands cancelled. The contractor shall purchase cement from the approved manufacturers only. The secured advance on cement shall be regulated as per Clause 10-B of conditions of contract. Secured advances on cement up to 90% of assessed price shall be paid to the contractor after indemnifying the Government and through insurance cover. The quantity of cement on which secured advance shall be paid will be restricted to the consignment of cement tested and passed in the test in department laboratory. Prior approval to be obtained from the Engineer for the quantities proposed to be purchased.

The contractor shall procure Ordinary Portland Cement conforming to IS 269-2015 / Portland Pozzolona Cement conforming to IS: 1489-2015 and use it on works. Ordinary Portland Cement, as required in the work, from reputed manufacturers of cement, having a production-capacity of one million tonnes per annum or more, such as A.C.C., L & T, J.P. Rewa, Vikram, Shri Cement, Birla Jute and Cement Corporation of India, etc., as approved by Ministry of Industry, Government of India, and holding license to use ISI certification mark for their product whose name shall be got approved from Engineer-in-charge. Supply of cement shall be taken in 50 Kg. bags bearing manufacturer’s name and ISI marking, samples of cement arranged by the contractor shall be taken by the Engineer-in-charge and got tested in accordance with provisions of relevant BIS codes. In case test results indicate that the cement arranged by contractor does not conform to the relevant BIS codes, the same shall stand rejected and shall be removed from the site by the contractor at his own cost within a week’s time of written order from the Engineer-in-charge to do so.

The cement shall be brought at site in bulk supply of approximately 50 tonnes or as decided by the Engineer-in-charge.

The cement Godown of having a capacity to store minimum of 2000 bags of cement shall be constructed by the contractor at site of work for which no extra payment shall be made from department. Double lock provision shall be made to the door of the cement godown. The keys of one lock shall remain with the Engineer in charge or his authorised representative and the key of the other lock shall remain with the contractor. The contractor shall be responsible for the watch and ward the safety of the cement godown. The contractor shall facilitate the inspection of the cement godown by the Engineer-in-charge at any time.

The contractor shall supply free of charge the cement required for testing. The cost of tests shall be borne by the contractor.

The actual issue and consumption of cement on work shall be regulated and proper accounts maintained as provided in Clause 10 of the contract. The theoretical consumption of cement shall be worked out as per procedure prescribed in Clause 42 of the contract and shall be governed by conditions laid therein.

Cement brought to site and cement remaining unused after completion of work shall not be removed from site without written permission of the Engineer-in-charge.

The contractor shall procure only TMT bars of Fe500-D Grade conforming to IS – 1786 (Latest edition) produced by the following manufacturers SAIL, RINL, TATA & JINDAL with a test certificate and use it on works after getting approval from department Engineer or tested in department laboratory. Sample shall be tested for all the required parameter as specified in the BIS before bulk purchase. The contractor shall have to obtain and furnish test certificates to the Engineer-in-charge in respect of all supplies of steel brought by him to the site of work. Samples shall also be taken and got tested by the Engineer-in-charge as per the provisions in this regard in relevant BIS codes. In case the test results indicate that the steel arranged by the contractor does not conform to BIS codes, the same shall stand rejected and shall be removed from the site of work by the contractor at his cost within a week’s time from written orders from the Engineer-in-charge to do so.

The steel reinforcement shall be brought to the site in bulk supply of 10 tonnes or more or as decided by the Engineer-in-charge.

The steel reinforcement shall be stored by the contractor at site of work in such a way as to prevent distortion and corrosion and nothing extra shall be paid on this account. Bars of different sizes and lengths shall be stored separately to facilitate easy counting and checking.

For checking nominal mass, tensile strength, bend test, re-bend test etc. specimen of sufficient length shall be cut from each size of the bar at random at frequency not less than that specified below:

For consignment below 100 tonnes

One sample for each 25 tonnes or part thereof

One sample for each 35 tonnes or part thereof

One sample for each 45 tonnes or part thereof

The contractor shall supply free of charge the steel required for testing. The cost of tests shall be borne by the contractor.

The theoretical consumption of steel on work shall be worked out as per procedure prescribed in Clause 42 of the contract and shall be governed by conditions laid therein. For the purpose of payment, weight will be calculated on the basis of bar bending schedule and weights of bar given as under. Wherever actual lengths placed differ from bar bending schedule actual length will only be measured.

Weight Kg/Metre

Steel brought to site and steel remaining unused shall not be removed from site without the written permission of the Engineer-in-charge.