Strengthening of 12 Nos. bridges (instead of 24) including corroded members, replacement of corroded rivets under SSE/BR/NJP.

Item Breakup - A-Schedule Items

3500.00 and any length with suitable nuts including DTI washers conforming to IRS-B1-2001 for bridges and steel structures with contractors labour, tools and plants and lead and lift etc., complete. NFR HQ-ENGG/N F RLY Metallizing of steel work of girders with sprayed aluminium after surface preparation by Sand/grit blasting, followed by one coat of etch primer (IS:5666) & one coat of Zinc Chrome primer (IS:104) and two coats of aluminium paint (IS:2339) with all labour, T&P and material as a complete job duly conforming to all relevant specifications and process given under Clause 39 of IRS-B1- 2001. Note: Nominal Thickness of sprayed Aluminium coating shall be 150 microns. DFT of Zinc chrome primer shall be 25-30 microns and DFT of each coat of Aluminium paint shall be 12-14 microns.

10.00 128263.26 ladders, inspection platforms, Trolley refuges etc., on bridges with structural steel conforming to IS:2062 including welding / bolting, priming painting with one coat of ready mixed paint of Zinc Chromate (IS:104) with DFT of 25-30 microns followed by one coat of Zinc Chrome Red Oxide (IS:2074) with DFT of 25 microns with all material, labour, T&P as a complete job. Note: Painting shall be paid separately under relevant item.

40.00 201462.92 members to replace existing corroded members of built up section made up of MS plate, angles, channels of different thickness and sizes including painting with one coat of ready mix paint Zinc Chromate priming to IS:104 followed by one coat of ready mix paint red-oxide Zinc Chrome priming paint to IS:2074. Structural steel should conform to IS:2062 E250- Grade'B0'. Fabrication and erection to be as per existing design initially by bolts and nuts and finally by rivetting during the sanctioned traffic block. Rate includes cutting of new steel work, removal of rivets by drilling, dismantling of any existing members required for inserting fabricated members, fixing of new fabricated built up members with all tools, plants, labour, consumables, machinery and accessories etc. Work will be executed as per IRS:B 1-2001. Note: Painting shall be paid extra under relevant item. Supplying and changing of corroded worn-out and loose rivets of any size at any location of the bridges with or without traffic blocks including all tools, plants, machinery complete in all respects.

Each Supplying & fixing of Anti-Skid MS / Stainless Steel chequered plates on un- ballasted deck bridge as per approved drawings, with matching grade stainless steel fasteners as directed by Engineer-in- Charge, on new bridge or replacement of existing chequered plates on old bridge including removal of old chequered plates and stacking near approaches of bridge, clear from all infringement. Note: Joints of chequered plates shall not fall in between sleepers NFR HQ-ENGG/N F RLY

2000.00 plate conforming to latest IS: 6911, ISS Symbol 409 M, minimum 6mm thick (excluding bead height) with flat bottom and top pattern conforming to IS: 3502, 1A with bead height of minimum 0.8mm as per RDSO drawings, including removal of existing chequered plates on existing Bridges. NOTE: Payment shall be made only as per weight of new chequered plate fixed. Total 21606304.40