REPAIR TO ROOF / ROOF TREATMENT, CHAJJA, FESCIA AND PARPET WALL INCLUDING MISC REPAIR WORK IN MD ACCN, OTM BLDG AND MISC LOCATION AT AFS KALAIKUNDA UNDER GE (AF) KALAIKUNDA

Amount

Demolition of cement concrete of any description and in any position not otherwise specifically provided for and removing of debris from premises and cleaning roof surfaces by brushing etc and washing down with water and removing dirt, dust etc complete to receive roof treatment up to 10 mtr height including necessary scalfolding and safety measures complete all as specified and as directed.

Demolation of cement concret(reinforced) Roofs, floors (other than ground floors), beams, staircases, landing, chajjas and similar suspended work and removing of debris from premises including necessary scalfolding and safety measures complete all as specified and as directed.

Cutting out cracks to V-section 10 mm width and depth 30 mm in existing roofs or terracing, cleaning out and filling solidly with a hot mixtures of bitumen and clean dry sand (1:1), by weight all as specified and as directed.

Materials and Labour for waterproofing treatment to existing RCC roof in the following steps up to 10 mtr height including necessary scalfolding and safety measures complete all as specified and as directed... (i) Complete removal of the existing water proofing treatment including padding (buid in cm/concrete) and removing of debris from premises and cleaning roof surfaces by brushing etc and washing down with water and removing dirt, dust etc complete (ii) Wire brushing and cleaning top surface of tiles, lime terracing or cement concrete, including flashings and junction of parapets, etc., and surface painting, with a layer of blown grade bitumen of any penetration applied hot @ 1.7 kg per sq. m, blinded with grit or pea size gravel @ 0.006 cu.m per sq.m, and lightly tampered (area of flashings, etc., shall be added to the roof area) (iiii) Supply and Laying, chicken wire mesh of size 12.5 mm x 0.51 mm (24 SWG) hexagonal construction including all laps, cutting and waste in fabric reinforcement to PCC roof padding including providing 40 mm thick plain cement concrete (1:2:4) type B0using 12.5 mm graded aggregates as in roof padding. (iv) Providing 15 mm thick screed bed or bedding layer of cement mortar (1:3), mixed with liquid water proofing compound as per manufactures instructions, on concrete surface of roofs or terracing and finishing surface even and smooth without using extra cement. (iv) Waterproofing treatment over smooth finished surfaces after application of cold applied bituminous primer @ 0.40 Kg /Sq M confirming to IS : 3384, providing and laying APP polymer, modified, non-woven polyester fabric of 150 grams/square metre, reinforced membrane, 3.00 mm thick, weighing not less than 3.60 Kg / Sq M, by torch on application method, with minimum 75 mm overlap on longitudinal direction and 100 mm overlap on the transverse direction or as per manufacturer,s instructions complete all as specified and directed. 3. APP membrane shall be laid and tested by the manufacturer deploying their own team under strict supervisionand Leak proof testing with ponding with water shall be done for 72 hours in presence of user representative and report shall be sumitted. Requisite guarantee certificate for ten year from date of completion of work from manufacturer along with contractor’s certificate required to be furnished after successfully completion of testing. The submission of both certificate is mandatory before issue of completion certificate.

Materials and Labour for waterproofing treatment to existing RCC roof in the following steps up to 10 mtr height including necessary scalfolding and safety measures complete all as specified and as directed. (i) Complete removal of the existing water proofing treatment and removing of debris from premises and cleaning roof surfaces by brushing etc and washing down with water and removing dirt, dust etc complete (ii) Wire brushing and cleaning top surface of tiles, lime terracing or cement concrete, including flashings and junction of parapets, etc and Providing 15 mm thick screed bed or bedding layer of cement mortar (1:3), mixed with liquid water proofing compound as per manufactures instructions, on concrete surface of roofs or terracing and finishing surface even and smooth without using extra cement. (iii) Applying bituminous primer @ 0.40 ltrs per sqm over prepared surfaces of roof including parapet surfaces confirming to IS : 3384. (iv) One layer of APP based polymeric membranes of approved manufacturers, 3 mm thick, weight not less than 3.6 kg/sqm, reinforced with non woven polyester fabric (weight not less than 160 gms/sqm). Polymeric membrane shall be taken to cover the thickness of slab and shall be finished by a membrane flushing. Note: (i) Laying of APP based membranes shall be done by torch application or as per manufacturer's instructions. (ii) Side overlaps shall be minimum 75 mm and the end taps shall be minimum 100 mm and sealing of all overlaps & joints as per manufacturer instruction. (iii) For parapets, membranes shall be taken to a height of minimum 60 Cm and then inserted to the parapet in a groove. The same shall be finished by a membrane flashing. 3. APP membrane shall be laid and tested by the manufacturer deploying their own team under strict supervisionand Leak proof testing with ponding with water shall be done for 72 hours in presence of user representative and report shall be sumitted. Requisite guarantee certificate for ten year from date of completion of work from manufacturer along with contractor’s certificate required to be furnished after successfully completion of testing. The submission of both certificate is mandatory before issue of completion certificate.

M&L for applying two coats of aluminium paints on top of APP membranes @0.125kg/sqm after complete laying of APP based polymeric membrane through authorised applicator complete all as specified & as directed.

M&L for PCC 1:2:4 type BO using 12.5 mm graded aggregate as in haunching. Kerb in roof, water troughs and the like including weathering, slightly rounded or chamfered angles and throating, chajja or similar work up to 10 mtr height including necessary scalfolding and safety measures complete all as specified and as directed.

M&L for RCC type A0 1:1.5:3 (using 12.5 mm graded aggregate) as in chajjas up to 10 mtr height including necessary scalfolding and safety measures complete all as specified and as directed.

Use and waste of form works (steel plate stiffened with steel angles, steel pipe scaffolding telescopic or otherwise) to sides and soffits of floor or roof beam,lintels, cantilevers, shelves including support, overhangs etc for rough finished surface of concrete up to 10 mtr height including necessary scalfolding and safety measures complete all as specified and as directed.

Use and waste of form works (steel plate stiffened with steel angles, steel pipe scaffolding telescopic or otherwise) to chajjas etc .for rough finished surfaces of concrete up to 10 mtr height including necessary scalfolding and safety measures complete all as specified and as directed.

Demolition of brick work or stone/boulder masonry, built in cement mortar including all quoins, arches, pillars, etc. complete all as specified and directed by Engineer in charge.

M&L for Brick work with fly ash bricks, straight or curved on plan exceeding 6 M mean radius built in cement mortar 1:6 Complete all as specified and as directed.

Taking down SWR pipes (any size or pattern), including all fittings, 'T', bends,etc., including removal to store for taking credit or for refixing (measured overall as fixed along the centre line over fittings and accessories), complete all as directed.

S & F PVC-U, type B as per IS 13592: 2013 single socketed soil waste pipes in any length with rubber ring joints, 110 mm dia, fixed to walls incuding mild steel clamp not more than 1metre C/C complete all as specified and directed by Engineer- in- charge .

All as per BOQ Srl No 13.00 here-in-before but for fixing only (Serviceable Material obtain from BOQ Srl Item No 12.00 shall be reused)

S & F UPVC bends with inspection door (any angle), 100 mm dia conforming to IS 14735: 1999 complete all as specified and directed by Engineer- in- charge

All as per BOQ Srl No 15.00 here-in-before but for fixing only (Serviceable Material obtain from BOQ Srl Item No. 12.00 shall be reused)

Taking down cement plaster from brick or concrete surfaces of any description including racking out joints, hacking for key, scrubbing down with water etc at any height and safety measures complete all as specified and directed.

Materials and Labour for rendering 5mm thick, cement plaster, in cement mortar (1:4) mixed with water proofing compound as per manufactures instructions over and including 10mm thick backing coat in cement mortar (1:4) on fair faces of brick work or concrete surface in walls, at any height and safety measures complete all as specified and directed. Note: - (Water proofing compound will be measured and paid separately)

Supply only Liquid water proofing compound conforming to IS: 2645 - 2003 specification complete all as specified and as directed.

M&L for rendering 5 mm thick in CM 1:3 on fair face of concrete surfaces as in ceiling, chajja, shelves etc. finished even and smooth with out using extra cement at any height and safety measures complete all as specified and directed.

M & L for preparation of newly plastered surfaces of ceiling and applying three coat of white wash on new surface at any height and safety measures complete all as specified and directed.

Material and Labour for applying two coats of cement-based paint, white or tinted to new plastered surfaces on walls including priming with alkali resistant priming paint and including preparation of surfaces at any height and safety measures complete all as specified and directed.

Taking up or down 15mm dia GI steel tubing and connections, including cleaning for refixing or removal to store complete all as specified and as directed.

Taking up or down 20mm dia GI steel tubing and connections, including cleaning for refixing or removal to store complete all as specified and as directed.

Refixing of old steel tubing and connection with new fittings ISI Marked in new or old position (wall, ceiling, floors, etc) of 15 mm bore all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

Refixing of old steel tubing and connection with new fittings ISI Marked in new or old position (wall, ceiling, floors, etc) of 20 mm bore all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

Supplying & fixing to walls , ceiling and laid in trenches 15 mm nominal bore, medium grade, galvanised coated steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

Supplying & fixing to walls , ceiling and laid in trenches 20 mm nominal bore, medium grade, galvanised coated steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

M&L for fixing of MS nozzles @ 300-500 mm c/c of required depth and manufacturers instruction injecting non shrink cementitious grout admixture with cement slurry at the rate of per bag of cement as per manufacturer’s instructions. (Manufacturer : Fosroc/Sika/Pidilite/BASF) through the prefixed nozzles under pressure using grout pump to fill all possible pores and gaps left within the concrete mass. When the flow of grout stops, or when the grout flows out of the adjacent nozzle, pumping is stopped and the nozzle is tied up and allowed to set for 24 hours all as directed. (NOTE :-The MS nozzles shall be sealed off with a quick-setting waterproofing agent. Grouting operation is carried out through the next nozzle till the entire area is covered. The grouting holes shall be finished by removing the nozzles and finishing flush with the surface up to any height including all necessary scaffolding and safety measures all as specified and directed. The cost of entire operation shall be carried out by approved manufacturers or their authorized applicator and deemed to be included in unit rate).

S & F rotational moulded polyethylene multi layer water tanks in green colour (vertical cylindrical with close top) as per IS 12701: 1996 of 500 litres capacity hoisted and fixed in position including provision of 20 mm /15 mm dia medium grade GI pipe for connecting inlet, outlet, over flow and washout pipes with and including 20mm Brass ball valves high pressure with polythene float and nut with and including dismantling exsiting unservieable tank one at any height and safety measures complete all as specified and directed.

S & F rotational moulded polyethylene multi layer water tanks in green colour (vertical cylindrical with close top) as per IS 12701: 1996 of 1000 litres capacity hoisted and fixed in position including provision of 20 mm /15 mm dia medium grade GI pipe for connecting inlet, outlet, over flow and washout pipes with and including 20mm Brass ball valves high pressure with polythene float and nut with and including dismantling exsiting unservieable tank one at any height and safety measures complete all as specified and directed.

S & F in repair 20 mm nominal size brass float valve, high pressure, with polythene float and flynut, screwed for iron pipe and fixed at any height and safety measures complete all as specified and directed.

M&L mild steel TMT bars 10 mm dia and over, cut to length, bent to shape required, including cranking, bending spirally for hooping for columns , hooking ends and binding with and including mild steel wire ( annealed) not less than 0.90 mm dia. or securing with clips and including welding has to be done with minimum 20 cm over lap for new and old of any height of structure complete all as specified and as directed.

M & L for mild steel TMT bars 6 mm to 8 mm dia, cut to length, bent to shape required, including hooking ends and binding with and including mild steel wire (annealed) not less than 0.9 mm dia or securing with clips and including welding has to be done with minimum 20 cm over lap for new and old of any height.of structure Complete all as specified and as directed.

Disconnecting existing water tanks, setting aside for repairs hoisting if required and refixing in position after cleaning of service PVC tank by rubbing vertical wall and bottom of with bleaching powder and allowed ½ hour to react and then washing down with water to get free from deposits and bleaching inside the tank and application/spraying of Anti-Bacterial chemicals to ensure total sterilization of tank from the inside, inside of the tank should be treated to kill further floating bacteria/virus in order to make the tank totally clean, bacteria free and safe for storage of drinking water. of capacity exceeding 250 ltrs & upto 500 ltrs capacity complete including mentioning the date of cleaning with white/black paint up to 10 mtr height including necessary scalfolding and safety measures complete all as specified and as directed.

Disconnecting existing water tanks, setting aside for repairs hoisting ifrequired and refixing in position after cleaning of service PVC tank by rubbing vertical wall and bottom of with bleaching powder and allowed ½ hour to react and then washing down with water to get free from deposits and bleaching inside the tank and application/spraying of Anti-Bacterial chemicals to ensure total sterilization of tank from the inside, inside of the tank should be treated to kill further floating bacteria/virus in order to make the tank totally clean, bacteria free and safe for storage of drinking waterof capacity exceeding 500 ltrs & upto 1000 ltrs capacity including mentioning the date of cleaning with white/black paint up to 10 mtr height including necessary scalfolding and safety measures complete all as specified and as directed.

Preparation of concrete surface of chajja/beam/slab thoroughly abraded to remove all laitance, any trace of loose plaster, oil, grease, paints and any other materials are to be removed by wire brushing the surface. The entire surface shall then be washed thoroughly with plenty of water and then allowed to dry. Defective concrete surfaces cut back to a sound base by chipping and removed loose concrete. Smooth surfaces to achieve by chemically roughened up to 10 Mtr height including applying bond coat of epoxy bonding agent (Nito Bond) & cement in 1 : 1 ratio bonding old and new concrete on damaged surface and all necessary scaffolding and safety measures all as specified and directed. .(The cost of entire operation shall be carried out by approved manufacturers or their authorized applicator and the cost of the same deemed to be included in unit rate).

M&L for cleaning to expose corruded reinforcement of chajja/beam/slab by wire brushing, emery paper or by mechanical means and to remove all loose scale and corrosion deposit and washing complete and providing additional reinforcement TMT bars of approved make, cut to length by electro welding method and applying one coat of rust removing chemical and anti rust coating (zinc) along its full circumference up to 10 Mtr height including all necessary scaffolding and safety measures all as specified and directed. (Manufacturer name of chemical shall be : Fosroc/Sika/Pidilite/BASAF) The cost of entire operation shall be carried out by approved manufacturers or their authorized applicator and the cost of the same deemed to be included in unit rate).

M&L for providiing and placing high built repair ready mix concrete (Micro concrete) grade of M-50 specification and strength conforming to ASTM- C109-99,ASTM- C 307 ,BS1881 Part 207 to expose corroded reinforcement of chajja/beam/slab with bonding agent as per manufactures instruction (Manufacturer : Fosroc/Sika/Pidilite/BASAF) proper compaction and finished to proper level upto a depth of 25mm with and including provision of formwork to the affected portion up to 10 Mtr height including all necessary scaffolding all as specified and directed.(entire operation shall be done by the approved manufacturer or their authorized applicator and the cost of the same deemed to be included in the unit rate)

M&L for providiing and placing high built repair ready mix concrete (Micro concrete) grade of M-50 specification and strength conforming to ASTM- C109-99,ASTM- C 307 ,BS1881 Part 207 to expose corroded reinforcement of chajja/beam/slab with bonding agent as per manufactures instruction proper compaction and finished to proper level upto a depth of 50mm with and including provision of formwork to the affected portion up to 10 Mtr height including all necessary scaffolding all as specified and directed.(entire operation shall be done by the approved manufacturer or their authorized applicator and the cost of the same deemed to be included in the unit rate)

M&L for identifying the cracks, remove all grease, oil, dust, residual curing compound, mould release agent or other contaminant that could impair adhesion, drilling the holes 6-10mm diameter and at least 50-75mm deep into the concrete element along the crack line at intervals of 500mm or a maximum of 1m centres and Inject Low viscosity epoxy resin through the nozzles using a low pressure injection grouting system from the lowest point or furthest point towards the centre till the resin coming out of the next hole along, at any height of structure complete all as directed and as specified in manufarturer's instruction. Entire operation shall be done by the approved manufacturer or their authorized applicator and the cost of the same deemed to be included in the unit rate.

Ganguly Construction

SG ENTERPRISE

Dilip Enterprise

NATIONAL CONSTRUCTION CO

T K Construction