Replacement of filter media at Kinyuka water treatment plant.

Providing and laying cement concrete in retaining walls, return walls, walls (any thickness) including attached pilasters, columns, piers, abutments, pillars, posts, struts, buttresses, string or lacing courses, parapets, coping, bed blocks, anchor blocks, plain window sills, fillets, sunken floor etc., up to floor five level, excluding the cost of centering, shuttering and finishing:

1:1.5:3 (1 cement : 1.5 coarse sand (zone-Ill) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources).

Centering and shuttering including strutting, propping etc. and removal of form work for:

Retaining walls, return walls, walls (any thickness) including attached pilasters, buttresses, plinth and string courses fillets, kerbs and steps etc.

Centering and shuttering including strutting, propping etc. and removal of form for

Suspended floors, roofs, landings, balconies and access platform

Reinforced cement concrete work in beams, suspended floors, roofs having slope up to 15 degree landings, balconies, shelves, chajjas, lintels, bands, plain window sills, staircases and spiral stair cases above plinth level up to floor five level, excluding the cost of centering, shuttering, finishing and reinforcement with 1:1.5:3 (1 cement : 1.5 coarse sand (zone-III) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources).

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level.

Thermo-Mechanically Treated bars of grade Fe-500D or more.

Removing dry or oil bound distemper, water proofing cement paint and the like by scrapping, sand papering and preparing the surface smooth including necessary repairs to scratches etc. complete.

Finishing walls with Acrylic Smooth exterior paint of required shade:

New work (Two or more coat applied @ 1.67 ltr/10 sqm over and including priming coat of exterior primer applied @ 0.90 litre/10 sqm)

Painting with synthetic enamel paint of approved brand and manufacture of required colour to give an even shade:

One or more coats on old work

Supplying and stacking at site.

10 mm to 12.5 mm size stone aggregate

20 mm to 40 mm size stone aggregate

40 mm to 65 mm size stone aggregate

Providing and fixing gun metal gate valve with C.I. wheel of approved quality (screwed end) :

65 mm nominal bore

80 mm nominal bore

Providing and fixing C.I. sluice valves (with cap) complete with bolts, nuts, rubber insertions etc. (the tail pieces if required will be paid separately) :

100 mm diameter

Class I

Supplying and stacking of river sand for filter media with effective size of sand need to be 0.15 mm to 0.30 mm with uniformity co-efficient 3 to 5 as per the direction of Engineer- in Charge.

Removing of existing filter media, perforated slab and solid block etc, from the half portion of the area of filter unit and kept t materials in layer at the remaining half portion, then clearing the bottom surface, re-setting new solid block and perforated slab in the bottom and then sorting, sieving and re-filling of the serviceable materials mixed with materials in first layer graded stone aggregated 90 mm to 45 mm 100 mm thick, 2nd graded stone aggregated 63 mm to 45 mm 100 mm thick, graded stone aggregated 53 mm to 22.4 mm 100 mm thick, stone chips 20 mm nominal size 100 mm thick and mainland coarse river sand 600 mm thick included disposal of the rubbish , slush and waste material etc, from the filter bed within a lead of 50 metre out site the filter bed etc complete as per the direction of Engineer- in Charge.

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