bids are invited for kandla– tank wagon gantry grating rev - dismantling of structural steel grating at tank wagon gantry , supplying, fabricating and erecting in position bolted and/ or welded hot dipped galvanised grating (fabricated as per bpcl standard drawing)made out of contractors own ms flats, tor steel cl s in walkways, platforms, stair case treads etc. including cutting to required size,shape, making hole of required size, making the edges smooth, removing the burrs, getting itgalvanised after fabrication, fixing with galvanised cl s etc all completed as specified anddirected. average mass of galvanizing should be min. 610gm/m2 conforming to is code 4759.all material to be supplied by contractor. , supply and installation of (m-shape top clip with j-cl stainless steel ss-304/316, and with m6 bolt (iso 4017) - of required length as site requirement, square nut and washer (iso 7093)) grating cl s with as per specifications , structural repairs of dismantled grating and platform structure (qty is for each section of grating which will be dismantled and reinstalled post repairs and painting) , preparation of surface (manual cleaning/wire brushing etc.) including labour, materials, tools & tackles, consumables, supervision, etc. to complete the work in all respects and as directed by engineer -in-charge. , preparation of surface (surface preparation by shot blast cleaning to sa2.5) including labour, materials, tools & tackles, consumables, supervision, etc. to complete the work in all respects in line and as directed by engineer -in-charge. , 1 coat of inorganic zinc silicate primer @ 65 micron/coat , 1 coat of epoxy high build micaceous iron oxide @ 100 micron , 2 coats of acrylic aliphatic polyurethane @ 30 micron/coat