Construction of 30000 litres capacity OHT (12 M STAGE) at Anbu Nagar in Ward no.13 in Annur Town Panchayat.

Earthwork excavation and depositing on bank with an initial lead of 10m and lift of 2m in the following classification of soils as directed by TWAD board officers.A.Hard stiff clay black cotton, hard red earth, shales, murram, ordinary gravel, stoney eart

a) First depth of 2m

b) Second depth of 1m

c) Pipe line

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

Supplying and erecting steel centering for sides and soffits including necessary supports and shuttering to the required height for RCC items using MS angles of size 25mm×25mm×3mm of boarding, laid oversilver oak joints of size 10cm × 6.5cm speced as 90cm centre to centre and supported by casurina props of 10cm to 13cm dia spaced at 75cm centre to centre complying with standard specifications etc., completed and as directed by officers.

Column footing (plane surface)

A)Square columns

B) Plane surface

0m - 3.30m Above GL

0m - 3.30m Above (cover slab)

C)Curved surface

RCC 1:1.5:3 (One cement, one and half sand and three aggregates) using 20mm 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

0m to 1.5m Below G.L.

0m to 4.50m Above GL

4.50m to 7.50 Above GL

7.33m to 10.98m from GL

10.99m to 14.64m from GL

14.65m to 15.30m from GL

Supplying fabricating and placing in position of HSD steel rods for reinforcement including the cost of steel and binding wire etc., complete and as directed by officers.

Painting two coats with approved Emulsion 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 officers.

Fabrication, supply, delivery and fixing of outside MS ladder of 45cm wide made out of 50x50x60mm MS angle for sides and steps in 16mm MS plain rods fixed at 30cm centre to centre welded, jointed etc., providing with suitable side supports, clamps and locking arrangements provided with one coat of red oxide paint for providing access to roof top 30,000 Lit capacity OHT of suitable inclined length including bottom anchorage and transportation and as directed by departmental Officers.

Providng and fixing of RCC inner access ladder in RCC 1:1.5:3 (One cement, one and half sand and three aggregates) using 20mm HBG stone for OHT including cost of reinforcement, placing grill in position, centering, shuttering charges, mixing concrete curing etc., to required height and clear width of 45cm consisting of two Nos. of vertical post of 10cm× 15cm and step slab of 25mm × 25mm etc., complete and as directed by officers.

Providing PVC ventilating arrangements mosquito proof nylon net with 110mm PVC cowl and as directed by officers.

Providing cut stone slab in CM 1:3 and as directed by officers.

Providng manhole cover of size 0.60 x 0.60M in RCC inner 1:1.5:3 with suitable reinforcement and 50x50x6mm MS angle fixed along edges and as directed by officers.

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

65mm Φ GI pipes

80mm dia GI pipes(Delivery-2, Overflow, Fire Fighter line and Cleaning)

90 MM PVC PIPE

Laying and joining of PVC pipe including cost of labor charges etc.

Refilling of pipe line trunch with excavated earth in layers of not more than 15cm thick well rammed and consolidated etc., complete

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