REPAIRS TO ROOF TREATMENT AND CONNECTED OTHER WORKS IN RESIDENTIAL AREA AT CVRDE AVADI

Amount

Taking down steel water tubing and connection including cleaning for refixing for 15mm bore pipe and removing from site or work complete all as specified and directed by Engineer-in-Charge.

Taking down or up old steel tubing 20mm dia bore galvanized including all connections all as specified and directed by Engineer-in-Charge.

Taking down or up old steel tubing 25mm dia bore galvanized including all connections all as specified and directed by Engineer-in-Charge.

S & F Galvanized steel water tubing 15mm dia bore, medium grade including provision of all fittings such as bends, tees, elbows, reducers, unions, plugs, sockets etc., fixed complete to walls and ceilings all as specified and as directed by the Engineer-in-Charge.

S & F Galvanized steel water tubing 20mm dia bore, medium grade including provision of all fittings such as bends, tees, elbows, reducers, unions, plugs, sockets etc., fixed complete to walls and ceilings all as specified and as directed by the Engineer-in-Charge.

S & F Galvanized steel water tubing 25mm dia bore, medium grade including provision of all fittings such as bends, tees, elbows, reducers, unions, plugs, sockets etc., fixed complete to walls and ceilings all as specified and as directed by the Engineer-in-Charge.

Refixing of old Galvanized steel water tubing 15mm dia bore, medium grade including provision of all fittings such as bends, tees, elbows, reducers, unions, plugs, sockets etc., fixed complete to walls and ceilings all as specified and as directed by the Engineer-in-Charge.

Refixing of old Galvanized steel water tubing 20mm dia bore, medium grade including provision of all fittings such as bends, tees, elbows, reducers, unions, plugs, sockets etc., fixed complete to walls and ceilings all as specified and as directed by the Engineer-in-Charge.

Refixing of old Galvanized steel water tubing 25mm dia bore, medium grade including provision of all fittings such as bends, tees, elbows, reducers, unions, plugs, sockets etc., fixed complete to walls and ceilings all as specified and as directed by the Engineer-in-Charge.

Disconnecting existing tanks, setting aside (or lowering if required) for repairs, cleaning, etc. and hositing if required reconnecting and re-fixing in position including cleaning repairing and providing new outlet connectionn of required size complete for capacity n.exc 1000 ltrs all as specified and directed.

Demolition of cement concrete in floors/roof surfaces including removal of old tar felt, plastering, concrete mugs, tiles etc up to the original RCC roof level all as specified and directed by Engineer-in-Charge.

M&L for PCC 1:2:4 Type B0 using 12.5 mm graded aggregate in roof as levelling course,kerbs or mud stops,rounded or chamfered on edges.

Water proofing treatment with water base polyurethane modified dispersion shall be carried out all as specified as under: - (a) Mechanical cleaning of surface to make it free from any bituminous residue / dirt. Oil and greese etc all as directed by GE / Engineer-in-Charge. (b) Cracks treatment by cutting open cracks and cleaning it from dirt loose materials etc and filling with polyurethane based sealant with and including application of PU based primer all as directed by GE / Engineer-in-Charge. (c) Applying water based polyurethane modified dispersion (single component cold applied, non toxic, VOC complaint) in 03 coats including 01 coat of primer of same material after dilution of water at 50% or specific primer matching same material as per manufacturer specification and as directed by GE / Engineer-in-Charge. Properties of polyurethane based chemical shall be as follows: - (i) Highly elastic (ii) UV resistance (iii) Adhesion to concrete > 1N/Sqmm.

(iv) Tensile strength - not less than 2.0N/Sq.mm for free film. (v) Elongation - not less than 300%. (vi) Solid content by weight - not less than 60%. (vii) Air / water perimeability BSEN 12390 at 5 bar - 72 hours should be NIL and minimum dry film thickness of water proofing membrane must be 1.0m. (viii) Accelarated weathering (ASTM 453): Pass 1000 hours.

(ix) Reaction to fire - non inflammable. Note: (i) To be applied by the manufacturer's authorized applicator only. Contractor has to provide manufacturer's test certificate for the above mentioned technical parameters and purchase Vrs. (ii) Removal of existing treatment to be paid separately. (iii) Roof top to be ensured to avoid water ponding. (iv) For accessible terrace and inaccessible terrace, 300mm height of vertical surface / parapet wall to be treated with same specification of slab. Make: Berger, Fosroc, or any other make approved by E-in-C's Branch for PU based water proofing treatment.

Demolition of brick work built in cement mortar complete all as specified and directed by Engineer-in-Charge.

M&L for brick work using sub class 'B' bricks in CM 1:4 straight or curved on plan exc 6m means radius complete all as specified and as directed .

Taking down cement plaster on brick or concrete surfaces hacking for key scrubing down with water etc complete all as specified and directed .

M&L for 15mm thick cement plaster in CM 1:4 on fair faces of brick work or concrete surfaces and finished even and smooth with out using extra cement but using water proofing compound @ 3% of cement weight all as specified and directed by Engineer-in-Charge. (Note: WPC shall be measured and paid separately)

Preparation of newly plastered/unplastered surfaces of wall and applying two coats of weather coat paint on concrete/brick over a coat of primer complete all as specified.

Cutting down plants/trees of girth n.exc 15cm from roof tops/sides external walls of bldgs chajjas wall junctions incl taking out possible quantities of roots entered in wall/slab surfaces and making good the surfaces and cleaning the roof surface. shall be carried out using PCC 1:2:4 of any depth up to bottom of excavated part/portion and 15mm thick plaster in CM 1:4 area n.exc 0.15 Sqm each all as specified and as directed.

M&L for 150mm thick Cement concrete type C-1, 1:3:6 (20mm graded stone aggregate) for PVC tank platform over the roof flat surface including necessary form work

Removing excavated/demolished material exc. 1.50 km but n exc.5km and depositing where directed

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