bids are invited for custom bid for services - supply of structural steel items and replacement of existing corroded steel structural members in bottom ash conveyor system in ash handling system of unit ii in ntpl- supply of structural steel items - 100 mm ms channel ismc 100 x 50 x 5 - in metric tonnes as per is 808: 1989 125 mm ms channel ismc 125 x 65 x 5.3 - in metric tonnes as per is 808: 1989 150 mm ms channel ismc 150 x 75 x 5.7 - in metric tonnes as per is 808: 1989 200 mm ms channel ismc 200 x 75 x 6.2 - in metric tonnes as per is 808: 1989 250 mm ms channel ismc 250 x 80 x 7.2 - in metric tonnes as per is 808:1989 300 mm ms channel ismc 300 x 90 x 7.8 - in metric tonnes as per is 808: 1989 200 mm medium flange beams ismb 200 x 100 x 5.7 - in metric tonnes as per is 808: 1989 250 mm medium flange beams ismb 250 x 125 x 6.9- in metric tonnes as per is 808: 1989 300 mm medium flange beamsismb 300 x 140 x 7.7 - in metric tonnes as per is 808: 1989 50 x 50 mm equal leg angles isa 50 x 50 x 8 - in metric tonnes as per is 808: 1989 65 x 65 mm equal leg angles isa 65 x 65 x 8 - in metric tonnes as per is 808: 1989 75 x 75 mm equal leg angles isa 75 x 75 x 8 - in metric tonnes as per is 808: 1989 90 x 90 mm equal leg angles isa 90 x 90 x 8 - in metric tonnes as per is 808: 1989 25 nb steel tube with thickness 3.2mm - in metric tonnes as per is 1239 (part 1): 2004 32 nb steel tube with thickness 3.2mm- in metric tonnes as per is 1239 (part 1): 2004 40 nb steel tube with thickness 3.2mm- in metric tonnes as per is 1239 (part 1): 2004 100 nb steel pipe (114.3 mm od x 8.56 mm thick) conforming to astm a106 grade-b, sch 80 12 mm ms plate in metric tonnes as per is 1730:1989 6mm ms plate in metric tonnes as per is 1730: 1989 150 mm width & 8mm thickness hot rolled steel flats in metric tonnes as per is 1730: 1989 galvanized floor grill as per drawing no: ntpl/ahs/bac/01 in the annexure 1 galvanized steps grill as per drawing no: ntpl/ahs/bac/02 in the annexure 2 , dismantling & erection - dismantling of elevating belt conveyor gallery (cg-11, cg-12, cg-13, cg-14) bottom corroded bracings, gallery walkway chequared plate & supports, conveyor bottom frames, rollers, roller frames, deck plate, conveyor supports, trestle structure, hand rail, toe guard, cable pipe, bottom ash bin structure, stair case, platform. tail end structural erection and painting conveyor gallery (cg)-14 structural erection and painting conveyor gallery (cg)-13 structural erection and painting conveyor gallery (cg)-12 structural erection and painting conveyor gallery (cg)-11 structural erection and painting conveyor gallery (cg)-10 structural erection and painting gallery between conveyor gallery (cg)-10 & bottom ash bin erection and painting trestles structural erection and painting takeup pulley structural erection and painting bottom ash bin +7.05 ml structural erection and painting bottom ash bin +10.01 ml structural erection and painting bottom ash bin +12.97 ml structural erection and painting bottom ash bin +14.75 ml structural erection and painting bottom ash bin vertical structural erection and painting bottom ash bin staircase erection and painting bottom ash bin leg strengtheningand painting bottom ash conveyor rollers & frames erection and painting total quantity :