REPAIR TO ROOF TREATMENT, CHAJJAS AND OTHER CONNECTED B/R WORKS IN DOMESTIC AREA AT AF STN TEZPUR UNDER GE (AF) TEZPUR

Amount

Demolition of existing cement concrete (un reinforced) in padding of roof slabs,covings of chajjas etc.,roughening surfaces of old concrete roof slab/chajjas by picking, sweeping clean and washing down with water to remove dust, etc.,brushing neat cement slurry with 3.0 kg of cement per sq. metre and rendering 10 mm thick, cement plaster/screed, in cement mortar (1:3) mixed with water proofing compound as per manufactures instructions over and including 25 mm thick plain cement concrete (1:2:4) type B0 using 12.5 mm graded aggregates over and including two coat of damp proof ultra through mechanical mean as directed by manufacturer,s complete make Asain or equivalent make of Sika/Fosroc/BASAF including all necessary scaffolding and safety measures complete all as specified and directed Note: - (Water proofing compound and Damp proof ultra or equivalent make will be deemed to be included in quoated rates

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, brushing neat cement slurry with 3.0 kg of cement per sq. metre 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.(primer and membrane to be used shall be same manufacturer) manufacture of density at 25° C, 0.87-0.89 kg/ litre and viscosity 70-160 cps prime shall be brand of Shalitex of STP or EmufalTE of M/s Texa Indian Ltd or cold stick bitumen primer of M/s IWL/Sika or equivalent make (iv) One layer of APP based polymeric membranes of approved manufacturers, 3 mm thick, weight (not less than 3.8 kg/ sqm ± 5 % per 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 shall be laid using Butane Torch and sealing all joints etc.

Note: (v) Laying of APP based membranes shall be done by torch application or as per manufacturer's instructions. (vi) 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. (vii) 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.(viii)finally applying with one coat of bituminous based solar reflective aluminium paint @ 125 gms / Sq M or as per manufacturer,s instructions complete all as specified and directed 3. APP membrane shall be laid and tested by the Authorised applicator 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 10 years guarantee certificate from Authorised 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 PCC 1:2:4 type B0 (using 12.5mm graded aggregate) roof kerbs, benching rounded or chamfered on edge including rounded or chamfered edges with necessary form work etc complete including demolition of old cement concrete of any descrition including all necessary scaffolding and safety measures complete all as specified and directed

Taking up or down steel tubing 15mm bore and connections, including cleaning, rerunning the old screw threads as required for re fixing and fixing old steel tubing with all new tube fittings (such as bends, elbows, tees, short pieces, connectors, back nuts, diminishing pieces, caps, plugs and unions, etc.) and fixing complete with clips, wall hooks, wooden plugs, or laying in trenches, etc and necessary connections in old position (Walls, ceiling, floors, etc.) 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.

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

Taking up or down steel tubing 20mm bore and connections, including cleaning, rerunning the old screw threads as required for re fixing and fixing old steel tubing with all new tube fittings (such as bends, elbows, tees, short pieces, connectors, back nuts, diminishing pieces, caps, plugs and unions, etc.) and fixing complete with clips, wall hooks, wooden plugs, or laying in trenches, etc and necessary connections in old position (Walls, ceiling, floors, etc.) 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.

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

Disconnecting water tank from roof slab/ staging of single/ double/ triple storey building, float valve with float arm and outlet pipe from PVC service water tank, Cleaning of PVC water tanks of capacity exc. 250 litre to 500 litre capacity including chemical treatment with Anti-bacterial agent consisting of following process: - Dewatering the tank with submersible pump, de-silting and removing of left over dirty water up to 100 to 150 mm in the bottom of the tank and sludge with special sludge pump, cleaning of walls and ceiling with special mechanized high pressure jet machines by rotary jet system at 100-120 Bar pressure (120 Kg /sq cm) which dislodges the layer of dirt, algae, fungus stuck on its surface usage of scrubbing machines for old stains and cleaning chemicals if required of make Eureka Forbes Ltd, floor of the dirty tank should be thoroughly cleaned up by fry jet cleaner to accumulate all dirt ,the remaining sludge should than be removed by sludge pumps, the dirt silt and other foreign material should further be removed by Industrial Vacuum Cleaners to make the floor totally dirt free, application/spraying of Anti-Bacterial chemicals to ensure total sterilization of tank from the inside, inside of the tank should be treated with specially developed 4 ft long ultraviolet Radiator to kill further floating bacteria/virus in order to make the tank totally clean, bacteria free and safe for storage of drinking water. All the above operations should be executed by trained workers and technicians, properly dressed along with gum boots, to work as per the direction of Engineer in charge, refixing water tank in original position, including replacement of old tank nipple and GI union (ISI marked) and including minor repair if required and testing complete including writing "Cleaned on ____(date) and next cleaning due on ____(date)" on 2 feet height outer surface of tank with white paint after removing old "date" using paint remove for tank capacity exc.250 litre to 500 litre capacity complete all as directed.

Disconnecting water tank from roof slab/ staging of single/ double/ triple storey building, float valve with float arm and outlet pipe from PVC service water tank, Cleaning of PVC water tanks of capacity exc. 500 litre to 1000 litre capacity including chemical treatment with Anti-bacterial agent consisting of following process: - Dewatering the tank with submersible pump, de-silting and removing of left over dirty water up to 100 to 150 mm in the bottom of the tank and sludge with special sludge pump, cleaning of walls and ceiling with special mechanized high pressure jet machines by rotary jet system at 100-120 Bar pressure (120 Kg /sq cm) which dislodges the layer of dirt, algae, fungus stuck on its surface usage of scrubbing machines for old stains and cleaning chemicals if required of make Eureka Forbes Ltd, floor of the dirty tank should be thoroughly cleaned up by fry jet cleaner to accumulate all dirt ,the remaining sludge should than be removed by sludge pumps, the dirt silt and other foreign material should further be removed by Industrial Vacuum Cleaners to make the floor totally dirt free, application/spraying of Anti-Bacterial chemicals to ensure total sterilization of tank from the inside, inside of the tank should be treated with specially developed 4 ft long ultraviolet Radiator to kill further floating bacteria/virus in order to make the tank totally clean, bacteria free and safe for storage of drinking water. All the above operations should be executed by trained workers and technicians, properly dressed along with gum boots, to work as per the direction of Engineer in charge, refixing water tank in original position, including replacement of old tank nipple and GI union (ISI marked) and including minor repair if required and testing complete including writing "Cleaned on ____(date) and next cleaning due on ____(date)" on 2 feet height outer surface of tank with white paint after removing old "date" using paint remove for tank capacity exc.500 litre to 1000 litre capacity complete all as directed.

S&F 500 ltrs IS marked multilayer in white/green colour rotational moulded polythytene water storage tanks (cylindrical vertical with closed top) as per IS 12701: 1996 hoisted and fixed in position with and including 20mm brass ball valves high pressure with polythene float and nut with and including provision of 20 mm /15 mm dia medium grade GI pipe for connecting inlet, outlet, over flow and washout pipes including dismantling exsiting one complete all as specified and directed .

S&F 1000 ltrs IS marked multilayer in white/green colour rotational moulded polythytene water storage tanks (cylindrical vertical with closed top) as per IS 12701: 1996 hoisted and fixed in position with and including 20mm brass ball valves high pressure with polythene float and nut with and including provision of 20 mm /15 mm dia medium grade GI pipe for connecting inlet, outlet, over flow and washout pipes including dismantling exsiting one complete all as specified and directed .

S & F 20mm bore ball brass valves, high pressure with polythene float and flynut complete, screwed for iron pipe or brass ferrule and fixed, complete all as specified and directed.

Cutting & removing tree roots from any height of walls/roof incl removal of trees, roots & grass vegetables upto 50mtr away from bldg & making good to the damaged portion of walls in CM 1:4 or PCC 1:2:4 type B-1 surface area exc 400 Sqcm & n exc 900 Sqcm complete all as specified and directed by Engineer – in – charge.

M/S AAYUSH ENGINEERING&COMPANY (BID ID -3298178)

LUIT CONSTRUCTION (BID ID -3298565)

Evergreen Firm (BID ID -3298490)

VARNI BUILDERS (BID ID -3298042)

M/S MINU ENTERPRISE (BID ID -3298279)

M/S SHIVAYA ENGINEERING (BID ID -3298450)

M/S Kangkans (BID ID -3298472)

KHANS (BID ID -3298144)

Singhs Construction (BID ID -3298430)

MAT ENTERPRISE (BID ID -3298473)

SHRI D. C. BISWAS (BID ID -3298253)