Bridge Engineers, Steel Structural, Bridges, Refinery Piping, Railway Guage, Civil Construction, Building Foundations, India, Kolkata, Calcutta, Braithwaite Burn Jessop, BBJ. Bridge Engineers, Steel Structural, Bridges, Refinery Piping, Railway Guage, Civil Construction, Building Foundations, India, Kolkata, Calcutta, The Braithwaite Burn and Jessop Construction Company Limited