Roof Insulation and Water Proofing work for the FFP Filter bank area roof terrace in building 306 at FRFCF project site, Kalpakkam

Supplying, mixing, and placing foamed concrete of nominal density 1200 kg/m³ using Ordinary Portland Cement (OPC 43/53 grade), Fly Ash Class F, clean potable water, and a suitable preformed foaming agent. The mix shall be prepared by producing a cementitious slurry (cement + fly ash + water), into which stable preformed foam is uniformly blended to achieve the specified density. The foamed concrete shall be mixed using an approved mixer, and foam shall be generated using a foam generator compatible with the foaming agent, ensuring uniform cell structure and density throughout the mix. The work includes batching, mixing, foam generation, density control (fresh density target: 1200 ± 25 kg/m³), pouring / placement into designated area at all levels and curing for a minimum of 10 days by moist curing or water spraying all as per specification and as directed by Engineer-in-charge.

Providing and laying roof insulation for buildings as specified inclusive of surface preparation, labour, tools, equipment, material etc., all complete as per specifications, drawings and as directed by the Engineer-in-charge, consisting of the following. The materials involved in this item of work shall meet the specifications specified in the agreement and manufacturer specifications a) Applying primer using single component Reactive Thermoplastic surface cross linked liquid primer, at a rate of 200 -250 g/m2 b) Applying minimum two coats of single-component Polymethyl Methacrylate (PMMA) modified vinyl acetate-based polymer flexible liquid waterproof coating with total average dry film thickness (DFT) of 1.0mm. c) Laying light weight foam concrete to minimum slope of 1 : 80 with minimum density of 1200 kg/m3, compressive strength minimum 4 MPa and thermal conductivity less than 0.4 W/m*K including required foaming agent and additives. d) Laying minimum 75mm thickness screed concrete of grade M20. e) Laying pre-painted 3 layered factory manufactured, specially formulated TPO membrane with bottom layer consists of strong TPO polymer base, centre layer with High strength polyester-reinforced scrim fabric and Top layer with Tough thermoplastic polyolefin (TPO) compound ply. The paint shall be done with Sure weld White 60 mil with whole assembly measuring to minimum 1.5mm thick. Note : 1. Ponding test in Roof terrace shall be performed as per the directions of EIC. 2. Foam concrete per unit will be paid under relevant item in the SOQ. 3. Grouting (if required) to arrest the leakage will be paid under relevant item in the SOQ. 10 years Guarantee period from the date of completion of work shall be given by the contractor in the prescribed format of the department for the workmanship and materials provided.

Providing, supplying, cutting, bending to shape, welding, fabricating, hoisting, placing and fixing in position structural steel members like MS structural embedment's/pipe and sleeves/penetration etc. Using MS angles, channels, I-sections, plates, tees, flats, rounds, square sections etc. including chamfering and rounding off the edges, applying a coat of Red lead paint primer / Zinc chromate primer of approved make and 2 coats of flat oil paint / sythetic enamel paint of approved colour and make, scaffolding and staging required for fabrication as well as erection complete all as per specifications, drawings and as directed by the Engineer-in-charge. Note: Lifting device arrangements if any required also arranged by the contractor at his own cost.

Providing and laying plain cement concrete M20 grade using 300 kg/cum of PPC, 20mm maximum size graded aggregates and washed 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. Dosage of PCE based admixture as per workability requirment at site conditions. Note: 1. The rate of concrete shall include all labour, equipment, charges for mixing & cost of admixture. Polycarboxylate ether (PCE) based 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 380 kg of PPC per cu.m. of concrete for all floors

Chemical anchoring of TMT bars Fe550D grade steel reinforcement of dia upto 20mm embedding in RC structures including power drilling holes of appropriate diameter in reinforced or plain cement concrete upto depth minimum 10 times dia of the rebar or as per manufacturer specification, cleaning and filling the hole, fixing the reinforcement in position with RE 500 chemical of HILTI make or equivalent anchoring adhesives and finishing, scaffolding etc all complete as per specification and as directed by Engineer-in-Charge. Note: 1. Reinforcement will be measured and paid under relevant item. 2. Holes fouling with embedded steel shall be grouted at your own cost.

Providing and applying painting Two coats at all levels including ceiling with Acrylic emulsion paint for External (ACE or Equivalent approved brand, colour and manufacturer) to give an even shade including one under coat of suitable primer, preparation of the surfaces, scaffolding complete all as per specifications and as directed by the Engineer-in-charge.

Supplying, fabricating, erecting and fixing in position at all levels, 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.

Providing straightening, decoiling wherever necessary bending, cutting, binding and fixing in position steel reinforcement TMT bars of Fe550D grade steel conforming to IS:1786 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 and binding wire complete all as per specification and as directed by Engineer-in-Charge at all lifts. Note: The rate shall be including the cost and testing of reinforcement steel at thrid party NABL lab. The reinforcement steel will be procured from dealers with a test certificate as approved by the department. For further details please see Clause 12 of Section VIII, General Information for Guidance of Tenderers.