supply of fabricated and galvanized b seriesfabricated and galvanized b series,fabricated and galvanized b series steel structures b-200 with batten plates as per rdso drg. no.eti/c/0071, rev-e or latest using fabricators own steel and zinc, steel conforming to is:2062/2011, is: 800 gr. e 250 (fe 410w) quality a and is 808/1989 and zinc to is:209/1992 and rdso spec no. eti/ohe/13 (4/84) with a and c slip nos 1,2 and 3 for galvanization or latest. each b-200 mast of 9.5 mtrs length with approximate weight of 474.19kgs. mc 200 mm x 75 mm shall be used. make-brand: bst infratech, amitasha, atv or any core/rdso approved source. [ warranty period: 30 months after the date of delivery ]