Replacement of filter media

Amount

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,floor five level, excluding the cost of centering, shuttering and finishing:

1:1½:3 (1 cement : 1½ coarse sand (zone-III) 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:

Columns, piers, abutments, pillars, posts and struts

Reinforced cement concrete work in walls (any thickness), including attached pilasters, buttresses, plinth and string courses, fillets, columns, pillars, piers, abutments, posts and struts etc. above plinth level up to floor five level, excluding cost of centering, shuttering, finishing and reinforcement :

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.

Providing and fixing Ist quality ceramic glazed wall tiles conforming to IS: 15622 (thickness to be specified by the manufacturer), of approved make, in all colours, shades except burgundy, bottle green, black of any size as approved by Engineer-in-Charge, in skirting, risers of steps and dados, over 12 mm thick bed of cement mortar 1:3 (1 cement : 3 coarse sand) and jointing with grey cement slurry @ 3.3kg per sqm, including pointing in white cement mixed with pigment of matching shade complete.

Structural steel work in single section, fixed with or without connecting plate, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete.

Finishing walls with Acrylic Smooth exterior paint of required shade :

Old work (Two or more coat applied @ 1.67 ltr/ 10 sqm) on existing cement paint surface

Wall painting with premium acrylic emulsion paint of interior grade,having VOC (Volatile Organic Compound ) content less than 50 grams/ litre of approved brand and manufacture, including applying additional coats wherever required to achieve even shade and colour.

Two coats

Supplying and stacking at site.

90 mm to 45 mm size stone aggregate

63 mm to 45 mm size stone aggregate

53 mm to 22.4 mm size stone aggregate

Providing and fixing G.I. chain link fabric fencing of required width in mesh size 50x50 mm including strengthening with 2 mm dia wire or nuts, bolts and washers as required complete as per the direction of Engineer-in-charge.

Made of G.I. wire of dia. 4 mm, PVC coated to achieve outer dia not less than 5 mm in required colour and shade

Providing and fixing G.I. chain link fabric fencing of required width in mesh size 25x25 mm made of G.I. wire of dia 3 mm including strengthening with 2 mm dia wire or nuts, bolts and washers as required complete as per the direction of Engineer-in-charge.

Supply and stacking of stone aggregate 20 mm nominal size

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 unifority co-efficient 3 to 5 as per the direction of Engineer- in - charge.

Removing of existing filter media perforated slaband solid block etc. from the half portion of the area of a filter unit and kept the materials in layer at the remaining half portion, then cleaning the bottom surface, resettomg new solid block and precoated slab in the bottom and then sorting, sieving and refilling of the serviceable materials mixed with new materials in first layer graded stone aggregated 90 mm to 45 mm thick 100 mm thick , IInd layer graded stone aggregated 63 mm to 45 mm 100 mm thick graded stone aggregated 53 mm to 22.4 mm size 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 materials etc. from the filter bed within a lead of 50 mtr, out side the filter bed etc complete as per the direction of Engineer- in- charge.