supply of fabricated and galvanized b series steelfabricated and galvanized b series steel,fabricated and galvanized b series steel structures b-175 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 -410 w], 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-175 mast of 9.5 mtrs length with approximate weight of 422.89 kgs. mc 175 mm x 75 mm shall be used any core/rdso approved source. [ warranty peri od: 30 months after the date of delivery ] ]