Repair and rehabilitation work of bridges over river Balason, Mahananda, Champta, Panchanoi, Mallarguri underpass and Darjeeling more ROB including development of road flank in selected stretches and road safety work in between km 570 to km 582 of NH

Amount

Scaffolding Making one set of scaffolding only for replacing glass panels, painting, uprooting plant and another repairing works of building and S&P works for external works only with 10 cm. dia bamboo as main posts at the rate of 1 metre centre to centre and 7.5 cm. dia bamboo ties @ 0.75 metre apart fitting and fixing with necessary coir, nails etc. as per direction of the Engineer-incharge. a) 3.90 metre height (New Set).

Making one set of scaffolding only for replacing glass panels, painting, uprooting plant and another repairing works of building and S&P works for external works only with 10 cm. dia bamboo as main posts at the rate of 1 metre centre to centre and 7.5 cm. dia bamboo ties @ 0.75 metre apart fitting and fixing with necessary coir, nails etc. as per direction of the Engineer-incharge. a) 3.90 metre height (Shifting Set).

Making one set of scaffolding only for replacing glass panels, painting, uprooting plant and another repairing works of building and S&P works for external works only with 10 cm. dia bamboo as main posts at the rate of 1 metre centre to centre and 7.5 cm. dia bamboo ties @ 0.75 metre apart fitting and fixing with necessary coir, nails etc. as per direction of the Engineer-incharge. a) Extra for additional 3.6 height or part thereof (New Set).

Making one set of scaffolding only for replacing glass panels, painting, uprooting plant and another repairing works of building and S&P works for external works only with 10 cm. dia bamboo as main posts at the rate of 1 metre centre to centre and 7.5 cm. dia bamboo ties @ 0.75 metre apart fitting and fixing with necessary coir, nails etc. as per direction of the Engineer-incharge. a) Extra for additional 3.6 height or part thereof (Shifting Set).

Cleaning the concrete surface Cleaning the concrete surface by removing dirt and debris, marking defective locations and removing loose concrete by careful stripping untill hard surface is exposed, cutting the concrete to regular shape, wire brushing the exposed surface and removing debris from site complete as per direction of the Engineer - in - Charge.

Cleaning the exposed reinforcement Cleaning the exposed reinforcement preferably upto full diameter by wire brush, applying two coats of polymer based rust removing compound left for 24 hours, removing the coating and then applying two (2) coats of polymer modified anti corrosive protective coating ormulated to inhibit the corrosion of reinforcement as per manufacturer's specification.

Patching of damaged concrete surface with polymer concrete Patching of damaged concrete surface with polymer concrete and curing compounds, initiator and promoter, available in present formulations, to be applied as per instructions of manufacturer and as approved by the Engineer (Reference to MORT&H's specification 2800).

Epoxy bonding of new concrete to old concrete Epoxy bonding of new concrete to old concrete(crack/spalling shall be sealed with epoxy injection/grouting coating of epoxy resin @ 0.80 kg/sqm should be applied) (Reference to MORT&H's specification 2805).

Providing and inserting nipples with approved fixing compound Providing and inserting nipples with approved fixing compound after drilling holes for grouting as per Technical Specifications including subsequent cutting/removal and sealing of the hole as necessary of nipples after completion of grouting with Cement/Epoxy (Reference to MORT&H's specification 2800).

Sealing of crack / porous concrete with Epoxy Grout Sealing of crack / porous concrete with Epoxy Grout by injection through nipples complete as per clause 2803.1 (Reference to MORT&H's specification 2803).

Excavation for Structures 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 and backfilling the excavation earth to the extent required and utilising the remaining earth locally for road work (Reference to MORT&H's specification clause 304).

PCC Grade M15. Plain/Reinforced concrete in open foundation complete all including vibrating and compacting finishing curing, sampling, testing etc. as per drawing and technical Specification (Reference to MOT&H specification 1500,1700 & 2200). (N.B. Variety.)

Bridge Work(Standard Book) (Chapter-17, page-557, Item No. 34(a)) Lifting of Concrete Block by Cranes a) 80 tones/hour

Dismentling and removing of damaged concrete railling Dismentling and removing of damaged concrete railling

Construction of precast RCC railing Construction of precast RCC railing of M30 Grade, aggregate size not exceeding 12 mm , true to line and grade, tolerance of vertical RCC post not to exceed 1 in 500, centre to centre spacing between vertical post not to exceed 2000 mm, leaving adequate space between vertical post for expansion, with a minimum 10 days curing complete as per approved drawings and technical specifications (Reference to MORT&H's specifications 2703, 1500, 1600 & 1700). (Pakur Variety )

R.C.C. Grade M-30 Furnishing and Placing Reinforced/ Prestressed cement concrete in super-structure as per drawing and Technical Specification (Reference to MORT&H's specifications 1500, 1600,1700 & 1800). (Pakur Variety ) for Footpath Slab.

Supplying. fitting and placing of HYSD bar Supplying, binding, fixing etc. including initial straightening, cutting to requisite length, hooking and bending to correct shape, placing in proper position of uncoated HYSD reinforcement bar in sub-structure complete as per drawing and Technical Specifications (Reference to MORT&H's specifications 1600 & 2200).

Painting Two Coats on New Concrete Surfaces Painting two coats, after filling the surface & applying a sealing primer, with synthetic enamel paint in all shades on new plastered concrete surfaces as per MORT&H's specification 803.6.2.(Reference to MORT&H's specification 803).

Printing new letter and figures of any shade for English/ Local/ Regional Languge Printing new letter and figures of any shade with synthetic enamel paint black or any other approved colour to give an even shade . English and Roman: Detail for 100 letters of 16 cm. height i.e 1600cm.

Filling of River Bed Material at Road Shoulder Supplying, spreading and consolidating RBM to a depth of 100 mm and above with power roller to proper gradient and camber including watering as necessary, and lighting, guarding, barricading and making adequate earthen bundh where necessary to protect the edges and curing with water for 2 to 3 days, mending cracks and depressions by rolling where necessary including all incidental charges of roller, cost of fuel & lubricants complete as per specification. The Compaction Factor is 0.70.

Clearing and Grubbing Road Land : By Mechanical Means Clearing and grubbing road land including uprooting rank vegetation, grass, bushes, shrubs, saplings and trees girth up to 300 mm, removal of stumps of trees cut earlier and disposal of unserviceable materials and stacking of serviceable material to be used or auctioned, up to a lead of 1000 metres including removal and disposal of top organic soil not exceeding 150 mm in thickness. (Reference to MoRT&H's specification clause 201).

Construction of Embankment with Material obtained from Borrow pits Construction of embankment with approved material obtained from borrow pits with all lifts and leads, transporting to site, spreading, grading to required slope and compacting to meet requirement of table 300-2 & 300-1 .The size course material in the mix of earth ordinarily shall not be exceed 75mm.(Reference to MoRT&H's specification clause 305).

"W" : Metal Beam Crash Barrier Providing and erecting a "W" metal beam crash barrier comprising of 3 mm thick corrugated sheet metal beam rail, 70 cm above road/ground level, fixed on ISMC series channel vertical post, 150 x 75 x 5 mm spaced 2 m centre to centre, 1.8 m high, 1.1 m below ground/road level, all steel parts and fitments to be galvanised by hot dip process, all fittings to conform to IS:1367 and IS:1364, metal beam rail to be fixed on the vertical post with a spacer of channel section 150 x 75 x 5 mm, 330 mm long complete as per clause 811.

Supplying & fixing of Raised Pavement Markers/Road Studs/Cats Eye Supplying & fixing of Raised Pavement Markers/Road Studs/Cats Eye ade of polycarbonate moulded body and reflective panels with micro rismatic lens capable of providing total internal reflection of the light entering the lens face which shall support a load of 13635 kg tested in ccordance to ASTM D 4280 Type H and compling to Specifications of Category A of MoR&TH Circular No. RW/NH/33023/10-97 - DO III Dt. 11.06.1997 & MoRT&H's specification for Road &Bridge Works (Fifth Rev.). Marker height shall not be less than 10 mm and shall not exceed 20 mm, width shall not exceed 130mm and with minimum reflective area of 13 sqcm on each side and slope to the base shall be 35 ± 5 degree. Fixing will be without nails but by using epoxy resin based adhesive as per manufacturer's recommendation including site clearence etc and complete as directed by the Engineer in Charge. The contractor will have to provide a test certificate from a reputable national/international laboratory comforming the above specifications.

Road Marking Providing and laying of hot applied thermoplastic compound 2.5 mm thick including reflectorising glass beads @ 250 gms per sqm area, thickness of 2.5 mm is exclusive of surface applied glass beads as per IRC:35 .The finished surface to be level, uniform and free from streaks and holes (Reference to MORT&H's specification 803).

Retro-Reflectorised Traffic Signs: Providing and fixing of retroreflectorised cautionary, mandatory and informatory sign as per IRC :67 made of high intensity grade sheeting vide clause 801.3, fixed over aluminium sheeting, 1.5 mm thick,when signs with maximum side dimensions do not exceed 600mm, or with aluminium sheeting 2.0mm thick when signs with maximum side dimensions exceeds 600mm, supported on a mild steel angle iron post 75 mm x 75 mm x 6 mm firmly fixed to the ground by means of properly designed foundation with M15 grade cement concrete 45 cm x 45 cm x 60 cm, 60 cm below ground level as per approved drawing (Reference to MORT&H's specification 801). 60 cm circular

Retro-Reflectorised Traffic Signs: Providing and fixing of retroreflectorised cautionary, mandatory and informatory sign as per IRC :67 made of high intensity grade sheeting vide clause 801.3, fixed over aluminium sheeting, 1.5 mm thick,when signs with maximum side dimensions do not exceed 600mm, or with aluminium sheeting 2.0mm thick when signs with maximum side dimensions exceeds 600mm, supported on a mild steel angle iron post 75 mm x 75 mm x 6 mm firmly fixed to the ground by means of properly designed foundation with M15 grade cement concrete 45 cm x 45 cm x 60 cm, 60 cm below ground level as per approved drawing (Reference to MORT&H's specification 801). 80 cm X 60 cm rectangular

M/S. DDSD CONSTRUCTION CO.

ASHIT GHOSH