Package 1a:- Fabrication & Erection Of Open Web/ Any Steel Truss Girder For Rob - 1 From Km 2+730 To Km 2+841. Bow String Girders For Rob-2 From Km 4+901 To Km 4+965 And Rob-3 From Km. 5+156 To Km. 5+220 For Super- Structure Including Supply And Fixing Of Expansion Joints And Excluding Construction Of Foundation, Sub- Structure And Super-structure Deck Slab For Six Lane Elevated Kona Expressway Project In The State Of West Bengal, India.