Repair and maint. and cleaning of Overhead water Tanks of various BNs under SHQ BSF GSP

52 mm thick cement concrete flooring with concrete hardener topping, under layer 40 mm thick cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size) and top layer 12 mm thick cement hardener consisting of mix 1:2 (1 cement hardener mix : 2 graded stone aggregate 6 mm nominal size) by volume, hardening compound mixed @ 2 litre per 50 kg of cement or as per manufacturer's specifications. This includes cost of cement slurry, but excluding the cost of nosing of steps etc. complete.

12 mm cement plaster of mix: 1:4(1 cement: 4 fine sand)

15 mm cement plaster on rough side of single or half brick wall of mix: 1:4(1 cement: 4 coarse sand)

12 mm cement plaster finished with a floating coat of neat cement of mix: 1:4(1 cement: 4 fine sand)

Painting with synthetic enamel paint of approved brand and manufacture to give an even shade : Two or more coats on new work.

Finishing walls with Acrylic Smooth exterior paint of required shade: Old work (Two or more coat applied @ 1.67 Itr/ 10 sqm) on existing cement paint surface

Cleaning of under ground sump, Over Head R.C.C. Tank ( independent staging) including disposal of slit and rubbish, all as per direction of Engineer-in-Charge. The cleaning shall consist following operations:- (i)Tank shall be emptied of water by pumping & bottom shall be cleaned of silt and other deposits. (ii) Entire surface area of the sump shall then scrubbed thoroughly with wire brush etc. and pressure washed with water. (iii) Chlorination of RCC internal surface by liquid chlorine. (iv) The treated surface shall be dried using air jetting and all loose particles shall be removal from the surface. (v) Finally the surface shall be treated with ultraviolet radiation etc. as per direction of Engineer-in-Charge.

Dismantling old plaster or skirting raking out joints and cleaning the surface for plaster including disposal of rubbish to the dumping ground within 50 metres lead.

Providing and fixing gun metal gate valve with C.I. wheel of approved quality (screwed end) : 65 mm nominal bore

Providing and fixing gun metal gate valve with C.I. wheel of approved quality (screwed end) : 80 mm nominal bore

Providing and laying S&S centrifugally cast (spun) iron pipes (Class LA) conforming to IS :1536 : 100 mm dia pipe

Providing and laying S&S centrifugally cast (spun) iron pipes (Class LA) conforming to IS :1536 : 150 mm dia pipe

Providing and laying S&S centrifugally cast (spun) iron pipes (Class LA) conforming to IS :1536 : 200 mm dia pipe

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) : Class I 100 mm diameter

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) : Class I 150 mm diameter

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) : Class I 200 mm diameter