Bridge Safety Estimate for Bridges Under Thalassery Section

Maintenance works

16.22:Repair of RCC Railing : Carrying out repair of RCC m30 railing to bring it to the original shape.

OD58200/2025-2026:Chipping and spalling / defective concrete and exposing the defective/ corroded reinforcement of the ceiling ,join the additional bar wherever 1/3 diameter of the barr is corroded.Removal of the defective concrete across the bar should be at least 2mm beyond the defective bar so that the reinforcing bar can be cleaned with emery ribbon , wire brush etc.After cleaning the bar wash the bar wash with clean water and collected spalled / fallen concrete .Measurement is calculated for whole exposed area.Including cost of materials,labour charges ,conveyance of materials to site hire charges of tools etc.complete.

OD212830/2025-2026:Rust remover/ Rust converter: Cleaning of rust /scales/corrosion from reinforcement bars should be carried out uing 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 matal bar, using brush and living 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 shal be measured for payment.

OD58196/2025-2026: 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.

OD58195/2025-2026: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.

OD212787/2025-2026:providing MS grill platform over MS pipe posts of size 40 mm dia. 6 M long, frames errected including all labour and higher charges for fixing and laying the platform including removal of entire platform after completion of the work.

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

55.14:Providing and fixing retro-reflectorised ceramic tilesProviding and fixing retro-reflectorised ceramic tiles of size 10cmX20cm using High Intensity Micro Prismatic (Type IV) grade sheeting with 7 years warranty fixed over Ist quality ceramic glazed tiles including cost of glue, cutting charges, fixing with suitable adhisive on concrete or other surface etc complete.

55.16:Providing and fixing guard post Providing and fixing guard post of size 200mmx200mm, 1400mm long, 800mm above ground level and 600mm below GL. casted in M20 Grade concrete reinforced with 4 nos of 8mm dia longitudinal bars and 6mm dia stirrups @ 100mm c/c, firmly fixed in position by means of foundation of size 0.5mx0.5mx0.7m in M15 grade concrete below ground level including painting 2 coats on exposed surface with synthetic enamel paint in alternate white & black band 20cm wide