GENERAL-TDY/2025-Bridge safety work of Mankayam and Koottakara Bridge in Thiruvambady LAC in Kozhikode District

Repair work

OD213109/2024-2025:Removing damaged concrete: Loose and delaminated concrete shall be identified and marked before proceeding with the removal. The loose cover concrete including the loose damaged concrete shall be removed upto beyond the corroded bars to a minimum depth of 10 mm behind the reinforcement. Only affected concrete shall be removed and conducting proper investigation, (Good & sound concrete should not be chipped / damaged) by chipping / hacking with chisel and hammer or by mechanical means like light weight chisel hammer, pneumatic chippers, making saw cut at periphery to avoid feather edge for all height and removal and disposal of debris at designated location including all material, labour, tools, temporary supports for structures, electricity, plant and machineries etc. complete as directed by Engineer-in-charge and/or Consultant. Depth of chipping may vary from 20 to 100 mm.

OD213100/2024-2025:Rust remover/Rust Convertor: Cleaning of rust / scales / corrosion from reinforcement bars should be carried out using acid based rust remover, Reebakleens RR of Fosroc or equivalent, or using alkali based rust converters such as Feovert of Krishna Conchem. The material is to be applied to the rusted metal bar, using brush and leaving it to dry for 30 Min. & washing surface with fresh water as required to exposed reinforcement bar at all heights, including all material, labour, tools, temporary supports for structures, electricity, plant and machineries complete as per detail specification and as directed by Engineer-in-charge and/or Consultant. The concrete surface area containing the cleaned rebars shall be measured for payment.

OD213099/2024-2025:Anti Corrosive treatment to Steel: Providing & applying inhibition coats/system to exposed reinforcement bars & also new bars, after cleaning & removing scales and rust completely as specified in 1.4, Two component inhibitor Nitozinc Primer std. of Fosroc or MasterEmaco P130 of BASF or equivalent having specific gravity of 1.75 and solid content 57(+/-3) Adhesive bond strength > 1.5 N/mm2, 40 microns DFT per coat as approved by Engineer-in-charge and/or Consultant shall be used as per manufacturer?s specification in two coats at all heights, including all material, labour, tools, temporary supports for structures, electricity, plant and machineries, necessary surface preparation and necessary protection after and during work. The concrete surface area contianing the rebars where the treatment is carried out shall be considered for measurement.

OD213104/2024-2025:New/Additional steel Reinforcement: Supplying, cutting, fabricating new reinforcement Fe500 for Jacketing, and providing additional steel reinforcement to compensate corroded reinforcement in existing member etc. and fixing with old existing reinforcement which was reduced to 15 % or more of its original diameter as required as provided in original structure and additional steels as directed by EIC and/ or consultant as required tying with 16 gauge annealed binding wire complete as per drawing and specifications for all heights including all material, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete as directed by Engineer-in-charge and/or consultant (TMT BARS of various size as required)

OD213106/2024-2025:Anchoring mainsteel and stirrups: Drilling holes of min 4mm larger than new rebar diameter into existing concrete substrate for anchoring of new rebar and depth of Min. 10 times the diameter of rebar and fixing with anchor resin grout Lokfix E (35/55/75) series or Lokfix P or Emfix or chemical anchor material or Masterflow 935 of BASF or equivalent as per NF P 18-831 and NF P 18-836 including cleaning, cutting, fabricating, chemicals, material, labour, tools, temporary supports for structures, electricity, plant and machineries etc. complete as directed by Engineer-in-charge and/or consultant for all heights

OD213111/2024-2025:Anchoring Steel & Shear Connectors: Drilling holes into existing concrete structure for anchoring of new rebar with 10 mm dia. shear connectors at 0.5 Mt. c/c (or as per design recommendation) and fixing with anchor resin grout Lokfix P / Lokfix E 75/55/35 series or Emfix or pure epoxy resin based cartridge form chemical anchor material or Masterflow 935 of BASF or equivalent as per NF P 18-831 and NF P 18- 836. Drilling hole for diameter: 14 mm, Drilling hole for depth: 100 mm including cleaning, cutting, fabricating, chemicals, material, labour, tools, temporary supports for structures, electricity, plant and machineries etc. complete as directed by Engineer-in-charge and/or consultant for all heights

OD213108/2024-2025:Injection Grouting-Cement polymer Cement: Providing and fixing Injection ports/nozzles at honeycombed area, cracks in CC, joints of channel and/or in staggered manner on all sides of Member at @ 0.5-0.75 M c/c spacing after drilling holes, to facilitate injecting cement-polymer grout, using quick setting material or epoxy putty and providing and executing injection / pressure grouting in prefixed nozzles/ports using Cement polymer grout (Cement : Polymer ) in proportion of (50:5) with non-shrink admixture Cebex 100 or equivalent and adding water for required consistency till no further grout is accepted by ports using grout pump, at all heights including all material, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete as directed by Engineer-in-charge and/or consultant.

OD213102/2024-2025:Epoxy Injection Grouting: Providing and executing injection/pressure grouting in cracks in the parent concrete by fixing PVC perforated nozzles at 150 mm to 200 mm distance or specified distances as per design and detailed specifications. Pressure grouting using low viscous epoxy grout Conbextra EP10M of Fosroc or Masterinject 1315 of BASF or Shaligroput EI or equivalent having mix density 1050 kg/m3, Compressive Strength (ASTM D695)->50 N/mm2,Tensile Strength (ASTM C 304-97)-18 N/mm2, Flexural strength(BS 6319 Part 4)-45 N/mm2 Pressure grouting shall be done at required pressure at all heights, including all material, labour, tools, temporary supports for structures, plant and machineries, curing etc. complete as directed by Engineer-in-charge and/or consultant.

OD213101/2024-2025:Polymer Modified Mortar (Pre-Packed): Providing and Applying single component, high strength, fibre reinforced, thixotropic cementitious patch repair mortar that achieves compressive strength minimum of 15 MPa at 1 day and 45 MPa at 28 days and capable of applying upto 50mm thick in single layer such as Renderoc SP40 of Fosroc or Master Emaco S 348 of BASF or equivalent, to the prepared concrete area for thickness up to 50mm, after applying epoxy resin based bonding coat as per manufacturer?s specification, before the bonding agent becomes tack free, initially by hand and finally finishing the same with trowel carefully compacting the same around the rebar and finishing to bring it in line with existing concrete surface on the columns, slabs, beam etc. at all heights, where the thickness of application is less than 50 mm in patches as per specification . Item rate is inclusive of all material including the bond coat, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete and as directed by Engineer-in-charge and/or consultant. (Payment to be made in Sq.M for thickness upto 50mm of PMM for patch area repaired)

OD213105/2024-2025:Microconcrete Reinstatement for thickness more than 50mm for RCC members:- Providing and laying of special repair material micro-concrete for reinstatement of members having thickness of repair more than 50mm and jacketing, using Single component, high strength, high flow cementitious micro-concrete having compressive strength minimum of M40 at 28 days such as MasterEmaco 346 or Renderoc RGL / RGS of Fosroc or equivalent, blended with washed saturated surface-dry (SSD), graded, low absorption, high density, aggregates of size 3mm to 10mm at 50% by weight of micro concrete (if thickness is 100mm or more) and water as per data sheet and pouring into the shuttering if required than use birds beak type form work using suitable arrangement or if required using pumping device for uniform flow of Microconcrete. The side shuttering can be removed after Minimum of 24 hours, preferably 3 days and the bottom shuttering after 7 days ensuring proper bond between the micro concrete and existing concrete substrate at all heights, including all material, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete as directed by Engineer-in-charge and/or consultant. (Payment shall be made in Sq.M for thickness upto 100mm of Microconcrete of area repaired, ) including shuttering work (Only steel reinforcement shall be paid in other relevant items)

OD44920/2025-2026:60.1.2. RING BUND Type II Putting up ring bund with earth fille gunny bags of top width 1.0m bottom width 2.0m height 2.0 m side and filling in between with earth to form ring bund and maintaining the same leak proof till the completion of the work and clearing the site by dismantling the bund after completion of the work.etc.complete..(Irrigation OD data 60.1.2)

OD44911/2025-2026:Bailing out water Using 5HP Pump- Bailing out water with 5HP engine and pump set including conveyance to site and erection,cost of fuel, lubrication oil and other stores, pay of staff etc complete

13.5.D.P.1:Plain/Reinforced cement concrete in sub-structure complete as per drawing and Technical Specifications PCC Grade M30 - Using concrete Mixer - Height upto 5m

14.9:Drainage Spouts complete as per drawing and Technical specification

OD44818/2025-2026:Providing and fixing hanging platform for inspection of repair works using steel hollow sections and maintaining it in a serviceable condition for the required duration as approved and removing it there after. The scaffolding system shall be equipped with accessibility provisions with ladders and the same shall be stiffened with bracings, runners, connection with the bridge deck etc. at required location with essential safety features for the workmen etc. complete as per directions and approval of Engineer- in Charge. The horizontal area of the scaffolding shall be measured for payment purpose. The payment will be made once irrespective of duration of scaffolding

Repair work

2.2:Clearing grass and removal of rubbish up to a distance of 50 metres outside the periphery of the area

2.1.1:Cutting of trees, including cutting of trunks, branches and removal of stumps, roots, stacking of serviceable material with all lifts and up to a lead of 1000 metres and earth filling in the depression/pit. Girth from 300 mm to 600 mm

2.1.2:Cutting of trees, including cutting of trunks, branches and removal of stumps, roots, stacking of serviceable material with all lifts and up to a lead of 1000 metres and earth filling in the depression/pit. Girth from 600 mm to 900 mm

2.1.3:Cutting of trees, including cutting of trunks, branches and removal of stumps, roots, stacking of serviceable material with all lifts and up to a lead of 1000 metres and earth filling in the depression/pit. Girth from 900 mm to 1800 mm

2.4.2.B:Dismantling of existing structures like culverts, bridges, retaining walls and other structure comprising of masonry, cement concrete, wood work, steel work, including T&P and scaffolding wherever necessary, sorting the dismantled material, disposal of unserviceable material and stacking the serviceable material with all lifts and lead of 1000 metres Prestressed / reinforced cement concrete grade M-20 & above - By Mechanical Means

14.1.C.1:Furnishing and Placing Reinforced Cement Concrete Grade M30 Using Concrete Mixer in super-structure as per drawing and Technical Specification

14.2:Supplying, fitting and placing HYSD bar reinforcement in super-structure complete as per drawing and technical specifications

3.13.1.B:Earth work in excavation of foundation of structures as per drawing and technical specification, including setting out, construction of shoring and bracing, removal of stumps and other deleterious matter, dressing of sides and bottom, backfilling the excavation earth to the extent required and utilising the remaining earth locally for road work. Ordinary soil - Mechanical Means - (Depth upto 3 m)

OD279010/2025-2026:Dry rubble masonry (without concrete levelling course)with good quality blasted rubble (withou tbond stone),and packing to compactness to lines and levels cost and conveyance of all materials labour charges etc. complete asper direction of Departmental officers at site (CTE approved data 1.2)

8.5:Providing and fixing of direction and place identification retro-reflectorised sign with 7 years warranty manufactured as per IRC :67 made of Type IV micro prismatic grade sheeting fixed over aluminium sheeting, 2 mm thick/ aluminium composit material sheeting 4 mm thick with area not exceeding 0.9 sqm, with suitable back supporting frame of MS angle 40x40x6 and supported on GI pipe pole 50mm NB confirming to IS 1239 firmly fixed to the ground by means of properly designed foundation with M 15 grade cement concrete min size 45 cm x 45 cm x 60 cm, 60 cm below ground level including painting all exposed surface with 2 coats of epoxy painting over epoxy primer and as per approved drawing and clause 801 including lettering symbols etc.

55.10.1:Providing and erecting retro-reflectorised Object Hazard Marker 300mm x 900mm Providing and erecting retro-reflectorised Object Hazard Marker sign with 07 years warranty, manufactured as per IRC 67 USING Type IV ASTM D 4956-09 micro prismatic retro reflective sheeting fixed over aluminium sheetig, 2 mm thick / aluminium composit material sheeting 4 mm thick with suitable back support frame and supported on a mild steel angle iron post 75mmx75mmx6mm, firmly fixed 30cm above ground level by means of properly designed foundation with M 15 grade cement concrete 30cmx30x45cm, 45cm below ground level including painting all non-reflective faces with epoxy paint 2 coats over epoxy primer as per approved drawing and clause 801.300 mm x 900 mm

OD285291/2025-2026:with ref to DAR civil spec - 14.1.2. Repairs to plaster of thickness 12 mm to 20 mm in patches of area 2.5 sq meters and under, including cutting the patch in proper shape, raking out joints and preparing and plastering the surface of the walls complete, including disposal of rubbish to the dumping ground within 50 meters lead:With

OD285366/2025-2026:Finishing with Epoxy paint (two or more coats) at all locations prepared and applied as per manufacturer's specifications including appropriate priming coat, preparation of surface, etc. complete.On Steel work

OD285397/2025-2026:Steel work in built -up tubular (round,square or rectangular hollow tubes, etc) and mild steel ( C channel, I section, T beam etc) trusses, etc, including cutting, hoisting, fixing position and applying a priming coat of approved steel primer - rentel basis per month.

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