Public Works Department Tender

Item No. 4: Cleaning of reinforcement from rust from the reinforcing bars to give it a total rust free steel surface by using alkaline chemical rust remover of approved make with paint brush and removing loose particles after 24 hours of its application with wire brush and thoroughly washing with water and allowing it to dry, all complete as per direction of Engineer-in-Charge.

Bars above 12 mm diameter

Item No. 5: Drilling suitable holes in reinforced or plain cement concrete with power driven drill machine to a minimum depth of 100mm upto 200mm in RCC beams, lintels, columns and slabs to introduce steel bars for sunshades/balconies including fixing the steel bars in position using epoxy resin anchor grout of approved make but excluding the cost of reinforcement, all complete as per direction of Engineer-In- Charge (a) Above and including 12mm dia

Item No. 6 : Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete above plinth level (a)Thermo-Mechanically Treated bars of grade Fe-500 D or more.

Item No. 7: Centering and Shuttering i/c strutting, propping etc. and removal of form for all heights: Columns, Pillars, Piers, Abutments, Posts and Struts.

Columns, Pillars, Piers, Abutments, Posts and Struts

Item No. 8: Providing, mixing and applying bonding coat of approved adhesive on chipped portion of RCC as per specifications and direction of Engineer-In-charge complete in all respect.

Epoxy bonding adhesive having coverage 2.20 sqm/kg of approved make

Item No. 9: Dismantling the existing strip seal expansion joint i/c structural steel edge beam anchor plate etc. of the existing damaged expansion joint by cutting with gas cutter and breaking of concrete by mechanical means i/c disposal of rubbish &malba etc. complete as per the direction of the Engineer-in-Charge.

Item No. 10: Providing and fixing in position single strip seal expansion joints catering to horizontal movement upto 80 mm. The expansion joints shall contain single cell assembly comprising of edge beams, poly chloroprene seal, anchorage elements, support and control system, all steel sections protected against corrosion, welded with suitable anchoring arrangement as per MORTH/manufacturer’s specifications and approved design and drawing. Poly chloroprene seal shall be a preformed/extruded single strip of such a shape as to promote self- removal of foreign material during normal joint operation. All complete as per direction of Engineer-in-Charge. Note: (i) cost of design and drawing shall also be borne by the contractor for expansion joints and temporary arrangement for covering gap of expansion joint. (ii) The item includes the cost of providing and welding additional reinforcement steel where required and cost of shuttering, thermo cool etc. (iii) Dismantling of existing damaged joints and concreting shall be paid separately. (iv) Expansion joint shall be provided with a warranty of trouble free maintenance of 15 years

Item No. 11: Providing and placing ramp on under replacement expansion joint to facilitate movement of traffic during peak traffic hours/non-working hours over the expansion joint. The ramp shall be fabricated using structural steel such as MS angles, flats and plates including cutting necessary holes for fixing on the road surface with dash fastners. The drawing for ramp shall be got approved from the Engineer-in-charge. The ramps shall be the property of the contractor after completion of work. The payment shall be made only once per expansion joint

Item No. 12: Providing and placing high strength, non shrink, pre-packed, free flow micro concrete having compressive strength of 60 MPa at 28 days (compressive strength of one day should not be less than 25 MPa) . The micro concrete mix shall be prepared by mixing high strength, non shrink, pre-packed, free flow micro concrete powder with well graded cleaned crushed aggregates of 10mm & down size (Aggregates should be less than 10mm but retained on 3.36mm) in proportion of 2:1 (Two part pre-packed micro concrete powder : one part stone aggregates) by weight for repairing excessively damaged area of structural elements/Jacketing work/expansion joint repair etc. excluding reinforcement but including scaffolding, curing as per manufacturer's specifications inclusive of all labours, materials, equipments etc. all complete as per directions of Engineer-in-Charge. Note:-High strength, Non shrink, prepacked, free flow micro concrete powder content considered in this item is 1450 kg/cum).

Item No. 13: Credit for cost of scrap/salvage value of dismantled mild steel materials (Bearings, Expansion Joints etc.) received from site, which will be the property of the contractor.

Item No. 14: Providing and applying of anticorrosive treatment to exposed structural reinforcement by two coats of IPNET RB or equivalent application with time interval of minimum 8 -10 hours between each coat after application of two coats of alkaline rust converting primer confirming to ASTM-B-117. The application shall be done by brush or spray after cleaning existing reinforcement with wire/ rotary wire brush to make the surfaces free from loose material, dirt etc. inclusive of all labour, materials, equipment etc. complete as per specifications and instructions of Engineer in Charge. (Surface area of member i.e. chipped concrete surface of beam, column, girder or slab shall be measured for payment purpose).

Item No. 15: Providing and painting with approved quality two or more coats of anti-carbonation paint, single component, flexible, elastomeric coating based on acrylic co-polymer coating and compatible primer coat as per manufacturer’s specifications and the direction of Engineer-in-Charge over un-plastered concrete surface of piers and superstructures after cleaning and removing dirt, dust, oil, grease, efflorescence to obtain an even surface and applying paint @0.44 kg per sqm and primer @ 0.22 kg per sqm, total dry film thickness (DFT) of the coating shall not be less than 150 microns including all scaffolding, testing of materials etc necessary tools, plants, machinery with all leads, lifts and depths and all related operations as required to complete the work as per drawings, specifications and directions of Engineer- in-Charge. Note:- The work shall be carried out only through approved applicator of manufacturer. The manufacturer/ applicator shall provide a guarantee of satisfactory performance of anti carbonation coating for 5 years through contractor.

Item No. 16: Lifting of superstructure span by deploying appropriate Lifting System for all span length with centralized power jack to facilitate for removing of existing bearing without damaging the girders, cleaning and removing the damaged bearings including its stacking. After completion of restoration of bearings at supports, lowering of deck shall be carried out to its original position without causing any damage to the deck and girder as per approved method statement and standard practice. The item includes all labour, material equipment etc. complete as per specification and instructions of Engineer in Charge including MORT&H specification (5th Revision) clause 2810.

Providing , fitting and fixing in position true in line and level POT-CUM-PTFE (conforming to IRC: 83 (Part-III) and clause 2005 of MORTH specifications) on pedestals from pier cap for vertical loads, complete in all respect with all components including grouting with non-shrink cementations grout as per specification. Item includes preparation of design and drawing and its approval from the Engineer-in-charge, manufacturing, testing, transportation to site, storage with all handling, lead, lift etc. and placing the permanent bearings in position including restoration of structure to its original position. Cost of providing temporary bearings / supports as required and other incidental expenses (if any) shall also be included. Bearings shall be provided with a warranty of trouble free maintenance of 20 years.

Item No. 17.1(a) Fixed Bearing 425 Ton Capacity, Longitudinal Capicity Normal 25 ton and Seismic 300 ton, Transverse capacity Seismic 125 ton

Item No. 17.1 (b) Transvesely Guided Bearing 425 ton Capacity, Longitudinal Capacity Normal 25 Ton and Seismic 300 ton, Transverse Capacity Normal 21.3 ton and Seismic 21.25 ton

Item No. 17.1 (c) Longitudinally Guided Bearing 425 Ton Capacity, Longitudinal Capacity Normal 21.25 ton and Seismic 21.25 ton, Transverse Capacity Seismic 125 ton

Item No. 17.1 (d) Free Sliding Bearing 425 ton capacity, Longitudinal Capacity Normal 21.25 ton and Seismic 21.25 ton, Transverse Capacity Normal 21.3 ton and Seismic 21.25 ton

Item No. 17.2 (a) Fixed Bearing 720 ton capacity, Longitudinal Capacity Normal 45 ton and Seismic 500 ton, Transverse Capacity Seismic 215 ton

Item No. 17.2 (b) Longitudinally Guided Bearing 720 ton capacity, Longitudinal Capacity Normal 36 ton and Seismic 36 ton, Transverse Capacity Seismic 215 ton