Salem District - Kadayampatti Block - Construction of a 30000 liter capacity (12m-staging) overhead tank at Semmandapatty market area H/O Semmandapatty Panchayat - MLACDS -2025-2026

1.) Construction of 30,000Lit OHT @ Semmandapatty market area H/o semmandapatty Panchayat

Earth work excavation & depositing on bank with an initial lead of 10 metre & initial lift of 2 metre in Hard shift clay, stiff block cotton, hard red earth shales, murrum, gravel, stoney earth, and earth mixed with small size boulders and hard gravelly soil (SS 20B) for foundation including shoring, strutting, baling out water providing danger light wherever necessary depositing the surplus earth on bank and other incedential charges etc., complete and as directed by TWAD board Officers.First depth of 0 to 2 m

Sand filling for foundation with clear river sand including cost of sand watering, ramming and consolidation etc complete as directed by TWAD Board officers.

Cement concrete 1:4:8 (one cement four sand and eight aggregates) using 40mm HBGS for levelling course for foundation including the cost of mixing concrete, ramming, curing etc., complete as directed by TWAD Board officers.

RCC in M30 GRADE using graded aggregtes of HBGs excluding cost of reinforcement, centering, shuttering strutting, but including cost of mixing concrete, placing, vibrating with mechanical vibrator, finishing, curing etc., complete as directed by TWAD Board officers. (For items 1.5m to 4.5m below GL)

For items 0 to 1.50m below GL

For items 0m to 4.5m above GL

For items 4.51m to 7.32 m above

For items above 7.32 m & up to 10.98 m from GL

For items above 10.98 m & up to 14.64 m from GL

For items above 14.64 m & up to 18.30 m from GL

Supplying and erecting steel centering for sides and soffits I including necessary supports' and shuttering to the required height for RCC items using MS sheets of suitable size of BG.10 stiffeneq with welded MS angles of size 25mm x 25mm x3mm of boarding, I type trust of size 25x25x3mm spce at about 90cm c/c and supported by 40 mm GI pipe (Medium) spaced at 75 cm complied to centre complying with standard specifications etc., complete and as directed by TWAD Board officers. (PLANE SURFACES-o-3.3m Below )

Square column - Below G.L. &above G.L 0-3.30

Curved Surface - 11.30m to 12.30m

Supplying, cutting, bending, tying, fabricating and placing in position of steel rods for all RCC works including cost of steel and binding wire etc.( The steel should conform to the relevant ISspecification and supplied with test certificate Fe. 415 grade as per IS specification No.1786/1985 and as amended from time to time) delivery at site of work including loading, freight, unloading, stacking, transit insurance charges, taxes etc. complete.and as directed by the TWAD Board officers.

Painting two coats with approved cement paint over one coat of priming coat over cement plastered exposed surface of the Reservoir including cleaning, preparing the surface and curing etc., complete and as directed by TWAD Board officers

Supply delivery and fixing of staircase with M30 grade concrete for landings, MS ladder of 0.45m wide using 50x50x5mm MS angles for sides and steps at 0.30m c/c, with GI pipe handrails using 32mm GI pipes for railings and verical support at 0.45m C/c, MS flats (Size 40mm x 5mm ) for horizontal ties at 0.3m c/c and at bottom with Anchor fastener bolts of size 12mm x 75mm including cost of materials labour for fabrication of handrails fixing, painting etc., complete.

Providing and fixing of RCC inner access ladder in RCC 1:11/2 :3 (one cement,one and half sand and three aggregate) using 20mm HBG stone for OHT including cost of reinforcement, placing grill in position, centring,shuttering charges, mixing concrete,curing etc. to required height and clear width of 45 cm consisting of 2 nos. of vertical post of 10 cm x 15 cm and step slab of 25mm x 25mm etc.complete and as directed by TWAD Board Officers.

Providing 110mm PVC vent cowl arrangements mosquito proof nylon net and as directed by TWAD Board officers

Providing Cut Stone

Providing manhole cover of size 1x1 0.60 X 0.60M in CI with suitable reinforcement and 5O x 5O x 6mm MS angle fixed along edges and as directed by TWAD Board officers.

Supply and delivery of GI pipe and specials as per ISI standerd specifications - (65mm dia GI Pipe)

50mm GI pipe

50mm GI union

50mm GI Elbow

50mm GM gate valve

Supply and delivery of 63mm OD 4 KSC PVC Pipe as per ISI Marked Standarad specification.

Supply and delivery of 63mm PVC MTA

Supply and delivery of 63mm PVC Elbow

Earth work excavation and deposting on bank with an initial lead of 10m & lift of 2m for pipe laying works with standard trench width and depth etc., complete

Lowering PVC pipes and specials to trench and laying to proper grade and alignment, jointing with PVC couplers with cement paste.

Refilling the excavated earth as per the standard specifications (63mm)

Refilling the foundation with excavated earth including consolidation as directed by the TWAD Board officers

Labour charges for GI pipe connection to the OHT, for inlet, outlet, overflow and scour arrangements including cutting and threading, earth work excavation & refilling.

GST Amount for providing Service to Government Contract Works for the above Construction Works. { GST Amount is the Total GST Amount for total overall quoted amount above this row in column "BB" for all works in this package}

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