CGF 2025-2026 Construction of 1.00 lakh litres capacity OHT -16 m staging height at Govindarajan nagar in Thiruvidaimarudur Town Panchayat

Earth work excavation for foundation (for narrow excavation) in all soils and sub-soils and to full depth as may be directed except in rock requiring blasting inclusive of shoring shuttering, bailing out water wherever necessary and depositing the surplus earth within the compound in places shown by the departmental officers with an initial lead of 10 mts and initial lift of 2 mts. and clearing and levelling the site, etc., complete complying with standard specification.

For 1st depth of 0 m to 2 m

In hard stiff clay, stiff black cotton, hard red earth, shales, murrams, gravel, stoneyearth and earth mixed with small sized boulders

For 1st depth of 0 m to 2 m

SDR - (Not Requiring Blasting) Earth work excavating and depositing on bank with initial lead of 10 m & initial lift of 2m in Soft disintegrated rock, laterite, soft rock or kankar, not requiring blasting

For 2nd depth of 2 m to 3 m

Supplying and filling in foundation and basement with Crushed Stone Sand (M- Sand) in layers of not more than 15cm thick well rammed watered and compacted etc., complete complying with standard specification.

Cement Concrete 1:4:8 (One Cement, Four crushed stone sand and eight hard broken stone jelly) using 40 mm gauge hard broken granite stone jelly for foundation including dewatering wherever necessary and laid in layers of not more than 15 cm thick, well rammed, consolidated and curing etc. complete complying with standard specification

Providing and laying in position, Standardised Concrete Mix M-30 Grade in accordance with IS:456- 2000 using 20mm and down graded hard broken granite stone jelly for all RCC items of works with minimum cementcontent of 400 kg/m3 and maximum water cement ratio of 0.45, including admixture (plasticiser / superplasticiser) in recommended proportions as per IS:9103 to accelerate, retard setting of concrete, improve workability without impairing strength and durability with about (5.0 cu.m.) 7730 kg. of 20mm machine crushed stone jelly and with about (3.3 cu.m.) 5156 kg. of 10-12mm machine crushed stone jelly and with about (4.79 cu.m') 7670 kg. of crushed stone sand, but excluding cost of reinforcement grill and fabricating charges, centering and shuttering and also including laying, vibrating with mechanical vibrators, finishing, curing, etc. and providing fixtures like fan clamps in the RCC floor/ roof slabs wherever necessary without claiming extra, etc., complete complying with standard specification and as directed by the departmental officers. The coarse and fine aggregates to be used should comply with the requirements of IS Standards. (No separate payment will be made by the Department for the excess usage of materials).

Beyond 1.5 m below GL

Upto 1.5 m below G.L.

Upto 4.50 m ht. Above G.L.

From 4.50 m to 7.32 m ht. From G.L.

From 7.32 m to 10.98 m ht. From G.L.

From 10.98 m to 14.64 m ht.From G.L.

Outer column 14.64-18.35 m

From 18.3 m to 21.96m

Supplying and erecting centering for sides and soffits including necessary supports and strutting upto 3.29 M height for plane surfaces as detailed below in all floors with all cross bracings using Mild Steel sheets of size 90 x 60 cm and 10 BG stiffened with welded Mild Steel angle of size 25mm x 25mm x 3 mm for boarding laid over silver oak joists of size 10cm x 6.50 cm spaced at abote 90 cm centre to centre and supported by casurina props of 10cm to 13 cm dia spaced at not more than 75 cm centre to centre etc. complete complying with the standard specificaiton. (Payment for centering shall be given after the concrete is laid)

Square Column

Column 0 to 3.3m ht above GLand below GL

Column above 3.3m to 4.3m htfrom GL

column above 4.3 m to 5.3m htfrom GL

column above 5.3 m to 6.3m htfrom GL

column above 6.3 m to 7.3m htfrom GL

Column above 7.3m to 8.3m htfrom GL

column above 8.3 m to 9.3m htfrom GL

column above 9.3 m to 10.3m htfrom GL

column above 10.3 m to 11.3m htfrom GL

column above 11.3 m to 12.3m htfrom GL

column above 12.3 m to 13.3m htfrom GL

column above 13.3 m to 14.3m htfrom GL

column above 14.3 m to 15.3m htfrom GL

column above 15.3 m to 16.3m htfrom GL

Plain surface

Below GL upto 3.3m above GL

0 m to 3.3m ht from floor level

3.3 m to 4.3m ht from GL

7.3 m to 8.3m ht from GL

11.3 m to 12.3m ht from GL

15.3 m to 16.3 m from GL

Circular Column

Column 0 to 3.3m ht above GLand below GL

Column 3.3 to 4.3m ht above GL

Column 4.3 to 5.3m ht above GL

Column 5.3 to 6.3m ht above GL

Column 6.3 to 7.3m ht above GL

Column 7.3 to 8.3m ht above GL

Column 8.3 to 9.3m ht above GL

Column 9.3 to 10.3m ht above GL

Column 10.3 to 11.3m ht above GL

Column 11.3 to 12.3m ht above GL

Column 12.3 to 13.3m ht above GL

Column 13.3 to 14.3m ht above GL

Column 14.3 to 15.3m ht above GL

Curved surface

Column 15.3 to 16.3m ht above GL -Curved surface

From 0 to 3.3m from floor level

Supplying, fabricating and placing in position Mild Steel / Ribbed Tor Steel grills for all RCC works as per design given including cost of steel and G.I. binding wire in all floors etc. complete complying with standard specification. (Contractor has to make his own arrangements for the supply of steel and binding wire)

Painting two coats for Exterior surface with approved Exterior Plastic Emulsion paint approved quality and colour over a priming coat, including thorough scrapping, clean removal of dirt, etc complete and including necessary plaster of paris, putty, wherever required etc, complete as per standard specification

Supplying and fixing of cutstones size 0.45x 0.45x0.15m in CM 1:3 below the inlet pipe

Providing RCC inside ladder as per approved design

Providing RCC spiral staircase as per approved design

Providing RCC hand rail of 1.2 m height around the top of the roof slab

Supply, delivery and fixing in position of RCC manhole of size 0.60 m x 0.60 m including locking arrangement, cost of materials etc. complete and as directed by the Depart. officers.

Providing ventilating arrangements over roof slab and roof dome of S.R.

Refilling the sides of the foundation with excavated soil (data 2024-2025)

Supply, delivery and fixing of pipes for OHT connections including civil works 100mm CI PIPE for inlet, outlet, overflow and 100mm CI pipe

Inlet

OUTLET

Scour

Overflow

Labour charges for Painting TWAD Board Emblem in accordance with the size and specifications as approved by the Board on the Service Reservoirs including cost of all consumables, one coat of base paint, scaffolding charges including painting NRDWP Logo on the Service Reservoirs.

Drilling of Borewells anywhere in Tamilnadu including transportation from one place to another with in Tamilnadu in alluvial soil sedimentary strata of clay and sand stone shale pebbles boulders etc. By first taking a pilot bore of 150 mm/200mm dia and then enlarging to required dia direct or reverse rotary mud circulation method using rotary rigs fuel, labour and drilling bentonite and water required for drilling at site. Site will be shown by the TWAD Board officers including construction of mud pit.

Drilling of 150/200 mm pilot bore

Upto 60 m Depth ending below ground level

From 60 m Upto 90 m Depth ending from ground level

Reaming 200 mm dia pilot bore to 350mm dia bore as directed by the TWAD Board Officer

Upto 60 m Depth ending below ground level

From 60 m Upto 90 m Depth ending from ground level

Supply of the following casing pipes of ISI approved quality with wall thickness not less than 7.5mm to 8.5mm with PVC couplers and cement Paste etc. Complete and including packing the annular space with pebbles quality and size of pebbles and the PVC pipe should be approved by the departmental officer.

200mm dia OD PVC Plain casing Pipe (CM)

200mm dia OD PVC slot casing Pipe (RS)

200mm dia OD PVC end cap

Labour Charges for inserting PVC Casing pipes assembly (with slots or without slots) in the drilled hole including jointing the pipes with PVC Couplers with Cement paste etc., complete supply and packing the annular space with pebbles of size and quality as approved by the executive engineers TWAD Board

Charges for developing the borewell with air compressor of 600 cfm capacity (Minimum 8 Hours) including transportation labour and fuel charges for compressor as directed by TWAD Board officers and conducting yield test by 'V' notch method.

Supply and deleivery of 3 PHASE SUBMERSIBLE PUMPSET of 15HP of duty condition 400lpm x60m etc complete as per standard specification

Supply and delivery of 3 PHASE PANEL BOARD - STAR DELTA WITH TWO LEVEL GUARD AND AUTO START suitable for 7.50 HP Pumpset including all charges etc complete as per standard specification.

Labour charges for the erection of submersible pumpset 7.5HP in borewell/openwell including fixing and jointing submersible cable withproper clamps upto the starter to required depth and also fixing of riser pipes to the required depth valves erection clamps, pressure gauges upto the exterior wall of pump room and erection of panel board consisting of TPICN switches starter, voltmeter, Ammeter, three pilot (indicating) lamps capacitor single phasing preventor, water level guard and laying and jointing the cables and twin earthing as per IE rules etc., complete and testing the pumpset and trail run for 10 days

PVC INSULATED AND SHEATHED 3 CORE FLAT TYPE COPPER CABLE CONFIRMING TO IS 694/1990 6 Sqmm.

Provision for Pipe connection arrangements for inlet outlet, scour and over flow etc., including cost of pipes, specials, valve, labour charges for lifting, aligning, cutting, threading, fixing and painting of GI pipes with two coats of approved quality enamel paint etc., complete as detailed below.

80mm dia G.I pipe

90mm dia PVC coupler

80mm dia GI Tee

80mm dia GI 900 Bend

80mm Dia GM Gate Valve

90mm dia PVC PVC pipe

80mm dia G.I coupling

Supply and fixing of TNEB meter Board suitable for 32A Three Phase service connection with 32A Fuse unit (500V) 32A neutral link and earth link (1" x 1/8" Copper flat) on TW plank of size 375mm x 300mm x 19mm with supporting TW reepers of 1" thick an either side with painting with suitable bolt and nuts for fixing the TW plank on wall with earth connection and inter connection with 7/20 PVC insulated copper wire from EB meter to fuse unit. SD126