Protective Coating Metallizing & Painting, replacement of of footpath, corroded/loose rivets of Steel girder bridges on BSL-KNW Section of BSL Division.

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 2 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. For maintenance work under running traffic

Supply, fabrication and erection of steel 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 3 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 & 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 4 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 MS chequered plates 6 to 8mm thick including removal of existing chequered plates on Bridges. NOTE: Payment shall be made only as per weight of new Chequered Plate fixed. BR.LINE-HQ-ENGINEERING/CENTRAL RLY

Galvanisation of Railway's Chequered Plates, Channels, Plates, Angles, and I-Section by hot dip process with Zinc Coating and mass of Zinc coating shall not be less than 705 g/sqm and galvanisation thickness shall not be less than 100 microns including necessary surface preparation 5 as per Clause-4 of IS:2629-1985. Galvanisation shall be done as per IS:2629-1985 and IS:4759-1996 with Zinc conforming to IS:209-1992, duly taking all the measures for safeguarding against embrittlement of hot-dip galvanised iron and steel products as per IS:6158-1984 with all contractor's labour, material, tools, plant, all lead, lift and crossing of tracks etc. complete and as directed by the Engineer in-charge.

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. For Rivets of size up to 25mm dia.

Item Breakup - 1-MS items

Existing girders with old paints

Surface preparation for painting of bridge Sqm Triangulated girders where the finishing coat shows signs of deterioration; but primer coat of paint is sufficiently in good condition and there are no signs of rusting etc. Surface shall be cleaned free from oil grease, scaling and other foreign matters without disturbing the primer coat. Painting cleaned triangulated bridge girders including all scaffolding, along with provision of Jhoola / hanging scaffolding ladder where required.

With one coat ready mix Zinc Chromate Sqm conforming to IS:104 with DFT of 25-30 Microns followed by one coat of Zinc Chrome red oxide conforming to IS:2074 with DFT of 25 Microns.

With two coats Aluminium paint in dual Sqm containers conforming to IS:2339 with DFT of 15 - 20 Microns for each coat. BR.LINE-HQ-ENGINEERING/CENTRAL RLY Surface preparation of steel work of bridge triangulated girders by cleaning with scrappers and/or wire brushes to remove all rust and loose or perished paint to prepare perfectly clean & dry bare metal surface free from all dirt/foreign material & ready for initial coat of paint. Rate includes cost of labour, consumables, brushes, misc. tools and plants, ladders, scaffoldings, jhoola, hanging scaffolding, staging etc. 5 041231(041280) Extra for working under traffic conditions Sqm 1043.00 7.96 8302.28 over items 041220 to 041274 [RATE = 10%] 6 041250(041280) Extra for working under traffic conditions Sqm 1564.00 3.90 6099.60 over items 041220 to 041274 [RATE = 10%] Painting cleaned triangulated bridge girders including all scaffolding, along with provision of Jhoola / hanging scaffolding ladder where required. 7 041271(041280) Extra for working under traffic conditions Sqm 1043.00 10.27 10711.61 over items 041220 to 041274 [RATE = 10%] 8 041273(041280) Extra for working under traffic conditions Sqm 2607.00 10.65 27764.55 over items 041220 to 041274 [RATE = 10%] Total 581606.30