supply of fabricated and galvanized b series steel structuresfabricated and galvanized b series steel structures,fabricated and galvanized b series steel structures b-150 with batten plates as per rdso d rg. no. eti/c/0071, rev-e or latest using fabricators own steel and zinc, steel conforming to is:2062:2011, i s:800, gr. e-250 [fe -410 w], quality a and is 808/1989 and zinc to is:209/1992 and rdso spec no eti/oh e/13 [4/84] with a and c slip nos 1,2 and 3 for galvanization or latest. each b-150 mast of 9.5 mtrs length with approximate weight of 378.67 kgs. mc 150 mm x 75 mm shall be used. make-brand: bst infratech, a mitasha, atv or any core/rdso approved source. [ warranty period: 30 months after the date of delive ry ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]