Dismantling of existing RCC supports and construction of new RCC Duct supporting structure in RCL at IGCAR, Kalpakkam.

Amount

All kinds of soil with depth upto 1.5m below average Ground level and disposing surplus excavated earth upto a lead of 50 metres.

All kinds of soil with depth exceeding 1.5m but not exceeding 3m below average Ground level and disposing surplus excavated earth upto a lead of 50 metres.

Providing and laying plain cement concrete 1:2:4 using 20mm maximum size graded aggregates and crushed stone sand including mechanical mixing, transporting and placing in required position, ramming, compaction, levelling, curing, shuttering, dewatering if any, complete all as per specification for levelling courses in foundation for walls, footings, floor drains etc., encasing pipes and other required works directed by Engineer-in-Charge complete all as per specifications.

Providing and laying cast insitu controlled reinforced cement concrete of specified grade at all levels and lifts mentioned below using 20mm maximum size hard granite machine crushed graded stone aggregates and crushed stone sand including weigh batching, charges for mixing & cost of admixture, mechanical mixing, transporting and placing at all lifts, vibrating, consolidating, curing and finishing smooth of all exposed faces complete for column footings, columns, lintels, sunshades, gutter slabs, beams, slabs, water tank, machine foundation and all other structural elements including dewatering wherever necessary (Formwork and reinforcement will be paid for separately) all as per specification and all as shown in drawings and as directed by the Engineer-in-charge for all insitu item. Note: 1. The rate of concrete shall include all labour, equipment, charges for mixing & cost of admixture. Chemical admixture confirming to IS 9103 shall be mixed in fresh concrete and prior permission from engineer-in-charge shall be obtained for dosage and compatibility 2. Test certificate of cement, procured from dealer/company to be submitted for all cement related works by the Contractor. 3. The rate shall be quoted on the basis of using minimum cement per cu.m. of concrete mentioned below for relevant grade of concrete. Any upward/downward variation required to obtain the specified strength will be paid for or deducted at the rate of cement specified in Schedule F.

M30 grade with 370 kg. of cement per cu.m. of concrete upto plinth level

M30 grade with 370 kg. of cement per cu.m. of concrete for all floors

Supplying, fabricating, erecting and fixing in position at all levels, for the items mentioned below, centering and shuttering to correct line and levels including strutting, propping, etc., with necessary bracings in all axes to give a stable assembly with provision for making the joints in the shuttering fully leak proof and with provision for fixing coil nuts with tie rods along with suitable channel for lateral supports and for inserts, projecting dowels, anchor bolts or any other fixture, including staging, access and working platforms etc., all complete as specified and directed including dismantling and removing the aforesaid assembly after the concrete attains the sufficient strength to self-support itself without cracking and distortion all as per specification, including all materials and labour complete in all respects at all lifts. The measurement for the formwork will be the actual area of forms in contact with concrete surfaces. Shuttering with plywood panels alone will be permitted.

Centering and shuttering as mentioned above for the Levels upto plinth beam.

Centering and shuttering as mentioned above for the Levels above plinth beam.

Providing, straightening, decoiling wherever necessary bending, cutting, binding and fixing in position steel reinforcement TMT bars of Fe500D grade steel conforming to IS:1786 'SAIL or VIZAG or approved equivalent make' and tying with approved annealed binding wire of 1.6mm dia in all reinforced cement concrete work at all lifts, including cost of supplying and fixing the spacer/cover blocks in cement mortar 1:2 and binding wire complete all as per specification and as directed by the Engineer-in-charge at all lifts. Note: The rate shall be including the cost of reinforcement steel. The reinforcement steel will be procured from dealers with a test certificate as approved by the department. For further details please see point 7 of Section VIII, General Information for Guidance of Tenderers.

Providing props/ jack supporting system to support existing structural elements of height specified below using adjustable pair of pipe prop Jack of dia 60mm or specified for loading capacity upto 4 M.T each prop, telescopic prop, with suitable 'U' type Stirrup header, including fixing of horizontal bracing, base plate, base jack, Telescopic Span if required and other accessories as directed by Engineer-in-charge. Note: 1. Supporting system required upto the completion of intended jobs, like retrofitting works etc., hence irrespective of duration of supporting system payment will be made only once. 2. Maximum spacing of pair of supporting jack shall be 900mm or directed by Engineer-in-charge. - Props / jack supporting system as specified above for structural elements supports at upto 7.0m from ground level.

Dismantling of RCC works at all levels by manually / by mechanical means, including Cutting and stacking of steel reinforcement bars and disposal of unserviceable materials within 50m lead as per specifications and directed by the Engineer-in-charge.

Conveying the surplus excavated earth, broken materials, debris, boulders and spoil by mechanical means and depositing at places inside DAE installation identified as Dumping yard as per requirement with a lead specified below including loading, unloading, breaking clods, levelling all complete as per specification 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, @ 30% in respect of debris 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.

Lead charges for lead Exceeding 4 kilometre but not exceeding 5 kilometre

Cutting of steel reinforcement for the following specified dia. of bars at all levels from concrete member using steel cutting machine with cutting wheel or gas cutting as specificied and directed by the Engineer-in-Charge. Note: Scaffolding will be paid under relevant item.

Cutting of 20mm dia steel reinforcment bars

Cutting of 16mm dia steel reinforcment bars

Cutting of 10mm dia steel reinforcment bars

Providing and applying the following coatings over the external and internal surfaces like concrete surfaces, plastered wall surfaces at all locations and at all elevations using "M/s Sika / CERA / FOSROC or approved equivalent brand of similar coats (a) Primer coat: one coat of water based acrylic Primer for protective coating of " CERA INFRAGUARD – WA PRIMER / FOSROC DEKGUARD / SIKAGARD 552W Primer" (b) Intermediate coat: Two coats of Acrylic crack-bridging intermediate protective coating " Fosrco DEKGUARD E2000 SIGNAL WHITE RAL9003 / Sikagard-545 W Elastofill" (c) Top coat : 2-coats Anti-carbonation and crack bridging protective coating of " CERA INFRAGUARD - WA / FOSROC DEKGUARD / Sikagard-550 W IN”, including preparing the surface, removing existing emulsion or any coat, including cost of all materials, labour, tools, tackles, equipment’s etc. complete all as directed by Engineer-in-charge and as per the specifications. Note: Scaffolding will be paid under relevant item.

Providing F3 finish over concrete surfaces in cement mortar 1:1.5 using crushed stone sand (1 part cement : 1.5 part fine sand) including wetting the surface, labours, curing, all materials, scaffolding, at all elevations complete all as per specification and as directed by the Engineer-in-Charge.

Providing and fixing double scaffolding system (cup lock type) on the exterior side at all height made using 40mm diameter M.S. tube spaced at 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 elevation 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 storied 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 600mm 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 overhead 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.