State Plan 2023-24 Providing and fixing steel storage tank of capacity 2.0 LL capacity at General Hospital Compound - General civil work

Amount

Working Charges

OD90676/2022-2023:Supply, installation, and commissioning of a pre-engineered, pre-fabricated, factory-manufactured steel storage Water Tank having a capacity of 200000 L thickness of 0.6 mm, in multiple layers as required for the capacity and height of the tank and multiple-layered PE sheet/membrane for the inner containment liner. The Tank Shell / Body & the Liner material shall be manufactured in a facility certified and compliant with ISO 9001/2000 standards. The Tank shall be supplied with access points, penetrations for inlets, outlets, drains and fittings, overflow and drain, and high and low water level indicators. All connections to the tanks shall be with flanged or threaded nozzles, placed to the KWA water mains. TANK ROOF- The roof of the tank shall be of corrugated Galvalume sheet steel and shall be domed, with a heavy-duty Hot-dip Galvanized truss frame for support, and capable of supporting 4-5 persons for maintenance and cleaning and the tank shall have an access hatch with cover, on the roof, for operation and Maintenance. TANK COVER-Tank covers shall be of approved galvanized vermin-proof construction. Roof ends shall be fitted with suitable vermin-proofing tape or other material, to prevent ingress of dust and foreign objects. Covers shall be firmly fixed to the top edge of the tank with galvanized bolts and nuts. LADDERS-Tanks shall be provided with Hot-dip Galvanized ladders internally or externally. External roof supports shall be of an appropriately designed Hot-dip galvanized steel construction. Tanks shall comply with relevant spill level, air gap, and overflow requirements relative to Effective Capacity. All nuts and bolts used for the panels shall be a minimum of 12mm size and hot-dip galvanized/Case hardened. The tank shall have a circular angle fixed around the total circumference of the tanks, at the top, of a minimum 2 mm thickness. Tanks shall be properly flushed out with clean water prior to being brought into service. DESIGN LIFE-The tanks shall have a design life of 50 years. TANK CONNECTIONS-Standard design valve outlet connection: One No. 200mm CI Flanged valve. ii) Overflow connection including an internally approved bell-mouth shaped bends to maximize the overflow capacity. One no. 100 mm. iii) One (1) scour drain outlet from the floor of the tank with an isolation valve. One No. 100 mm TANK LINERS-Tank liners shall be purpose-designed and manufactured and shall comply with AS/NZS 4020 (Appendix A) of 2005 and ANSI/NSF 61/2008, Section 5 Certificates of compliance to the above standards shall be furnished by the manufacturer of the tanks. Tank liners shall: i) Be factory manufactured to one-piece construction, fabricated from multi-layer PE sheet, certified for potable drinking water, to ANSI NSF 61 and duly UV Stabilized) Be of PE (polyethylene) in multi-layer construction for strength, reinforced with woven scrim industrial fabric to prevent elongation and enhance tensile strength. The contact surface shall be of the Metallocene layer. iii) The total liner material thickness shall be no less than 0.8 mm thick. The tensile strength shall not be less than 2266 N (warp) and 2495 N (weft) and heat-sealing strength of 2056 N. All the liner welded lap joints shall be strengthened with Metallocene encapsulating tape welded over the overlap. vi) The Metallocene tape shall cover and protect the exposed material at the edges of the liner joints to further prevent the ingress of water into the scrim. vii) Liners shall be positively and continuously attached to the top outer edge of the circumference of the tank to prevent the entry of water from the runoff from the roof structure. viii) All liners on tanks over 2 m in height shall have continuous intermediate liner support designed out of nylon (or other material) cord, around the circumference of the tank, at vertical intervals corresponding to the level of each ring. ix) The intermediate liner support cords shall be firmly secured to the steel shell at each level, to prevent stress on the liner welded joints, and thereby eliminate the possibility of failure. CORROSION PROTECTION-The tank structure shall have a secondary corrosion protection system using sacrificial magnesium anodes. The number of anodes, their location around the tank, and the mass of each anode shall be designed for an anode replacement frequency of five years. The anodes shall be installed external to the tank and concrete apron with their location marked with a suitably label-Cost for Tank steel with a 10years guarantee includes Steel wall, steel domed roof, Zinc Alum steel, Cost for Poly ethylene infinity liner, Geosynthetic Fibre with food grade plastics are used for inside coating and Support Arrangements, Cost for Fabricated items, attachments, and accessories like steel ladder, Cost of Fabricated nozzles, overflow nozzles and drain arrangements, Cost for HDG nut and bolts, Freight Charges, Erection Installation and commissioning of Tank components.

2.6.1:Earth work in excavation by mechanical means (Hydraulic excavator)/manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including disposal of excavated earth, lead up to 50 m and lift up to 1.5 m, disposed earth to be levelled and neatly dressed.All kinds of soil

4.1.8:Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level:1:4:8 (1 cement : 4 coarse sand : 8 graded stone aggregate 40 nominal size)

5.1.3:Providing and laying in position specified grade of reinforced cement concrete, excluding the cost of centering, shuttering, finishing and reinforcement - All work up to plinth level:1:2:4 ( 1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size)

5.9.1:Centering and shuttering including strutting, etc. and removal of form for:Foundations, footings, bases of columns, etc for mass concrete

5.22.1:Steel reinforcement for R.C.C work including straightening, cutting, bending, placing in position and binding all complete upto plinth levelMild steel and Medium Tensile steel bars

100.31.2.1:Conveying and fixing C.I. sluice valves (with cap) by providing bolts, nuts, rubber insertions etc., complete, but excluding the cost of the valve (tail pieces, if required, will be paid separately): 80mm diameter, Class II.

100.31.2.2:Conveying and fixing C.I. sluice valves (with cap) by providing bolts, nuts, rubber insertions etc., complete, but excluding the cost of the valve (tail pieces, if required, will be paid separately): 100mm diameter, Class II.

100.98.213:Supply of PVC Pipe, 6kg/cm2, 90mm Dia.

100.98.214:Supply of PVC Pipe, 6kg/cm2, 110mm Dia.

100.98.457:Supply of CI Double Flanged Sluice Valve Conforming to IS 14846 - 2000, Sluice Valve with Cap PN 1.6, Size 80mm.

100.98.458:Supply of CI Double Flanged Sluice Valve Conforming to IS 14846 - 2000, Sluice Valve with Cap PN 1.6, Size 100mm.

OD148451/2023-2024:Supplying and fixing of 110mm Flanged T/P

OD148452/2023-2024:Supply and fixing of 90mm PVC Flanged T/P

OD148453/2023-2024:Supply of 110 mm CIR joint

OD148454/2023-2024:Supply of 90 mm CIR joint

100.98.1008:Engaging Coolie.

100.98.1009:Engaging Fitter ( grade 1).

Bidder Name

PRAKASH S R