Special repairs to Sunshade and external walls at North PDPM area in Kalpakkam Township during the year 2024 - 2025.

Amount

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.

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.

Steel Prop of up to 5 MT Capacity and up to 3.40 m height

Providing, erecting, placing in position and removing Formwork for all insitu concrete works at all lifts and all shapes such as circular works, chamfers, splays, etc., using Steel / Plywood shuttering including centering, scaffolding, strutting, propping with necessary bracing in all areas, fixing of EPs, cutting holes and fixing pipe sleeves, applying of approved form oil over surface in contact with concrete, de-shuttering after specified curing period, etc., all complete as per drawings and specifications. (Note : Measurement for the formwork shall be the area of forms in contact with concrete surfaces. Stop boards for construction joints will not be measured seperately for payment).

Providing and casting insitu Reinforced Cement Concrete 1:1.5:3 using machine crushed hard broken granite stone of nominal size 20mm including mechanical mixing, transporting, placing at all lifts, vibrating, consolidation, curing, finishing smooth all exposed faces, for all insitu concrete items, etc. as per drawings and specifications. (Note :The rate quoted shall be exclusive of reinforcement and formwork which will be paid for separately under relevant items.)

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.

25mm average thickness

50 mm average thickness

Providing anti corrosive treatment to steel reinforcement by removing the rust from corroded reinforcement and applying anti-corrosive chemicals as per specification 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 complete as per specification and as directed by Engineer-In-Charge.

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 separately 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, 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)

Repairing and rectifying the minor repair works in CM 1:3 like wall cracks, floor cracks, spalling of mortar on sides of doors, windows, wall and door joints, including the cost of materials, T&P etc., all complete as directed by Engineer-in-charge.

Repairs to the wall and ceiling cracks by cutting 'V' shaped grooves and filling with crack seal compound of approved make 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, scaffolding, etc., all complete as detailed below as per manufacturer specifications and as directed by the Engineer-in-Charge. i) Surface preparation: Remove the existing coatings, paints, etc., Seal the surface cracks by cutting 'V' shaped grooves and filling with crack & using seal compound. Clean the surface thoroughly to remove the dirt's and contaminates and keep dry prior to the primer application, debonded or weak plaster must be replaced with polymer modified mortar. ii) Bond Coat (1st Coat) : Applying Base primer bond coat with of make FAB chemical (MIXBond AC) or Bostik (Boscocem 476) over the existing surface. Mixing ratio consumption and application procedure shall be as per manufacturer specifications. iii) Highly flexible cementious water proofing coat (2nd & 3rd Coat): Applying 2 component waterproofing coating of make FAB Chemical (Mixguard AC) or Bostik (Boscolastic). Duration between these two coats shall be minimum 4 hrs. Mixing ratio of chemicals, consumption and application procedure shall be as per manufacturer specifications.

For one coat of exterior emulsion over Plain Surface iv) One coat of external wall primer (3rd coat): Applying one coat of external wall primer of make Asian or other approved equivalent, consumption and application procedure shall be as per manufacturer specifications. v) One coat of premium exterior emulsion paint (4th coat): Applying 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. Mixing ratio of paint, consumption and application shall be as per manufacturer specifications. Note: Cost for plastering will be paid for separately under relevant item.

Refixing of 110mm dia. PVC rain water pipes of existing Rain water pipes which have come out from its original position due to decay of teak wood plug/packing piece, rusted GI clamps including providing new Teak wood plug/packing piece, fixing with new GI clamp with necessary screws, etc., all complete as directed by the Engineer-in-charge.

Providing and fixing 110mm OD best quality 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.

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.

Exceeding 1 Km but not exceeding 2 Kms

Dismantling Reinforced cement concrete at all lifts including clearing and depositing the same with a distance of 100 metres as directed by Engineer-in-charge.

Bidder Name

K R TRADERS