Bridges are indeed fascinating, but the engineering behind them is awe-inspiring. I have seen few bridges while construction in progress, it is a lot of steel work behind it if it is a concrete bridge, although pure steel bridges also need concrete foundations.
You work is indeed amazing and it way too different a normal photographer do. Keep posting more like this..
Watching bridges being built is neat. I've seen some of them in action too. There is also a lot of work going into the supports, they have to go down deep into the ground to anchor the bridge properly.
Finding the right angle to take a bridge photo is difficult. Sometimes I wish I had a drone or a boat.
Thank you.