Andrew Carnegie's company initially used iron to build bridges due to its strength, availability, and cost-effectiveness compared to other materials at the time. Iron was a widely used material in the 19th century, allowing for the construction of durable and reliable structures. The use of iron in bridge building also facilitated the expansion of transportation networks, which was crucial for industrial growth. As technology advanced, Carnegie later embraced steel, which offered even greater strength and flexibility.
they really did build the bridge
civil engineers, structural engineers, and architects are the main bridge builders.
Steel bridges take a long time to build because of the precision of the work. The pieces have to fit perfectly together, or else the bridge will not be safe.
Bridges are almost invariably built from steel due to its high structural strength, flexibility and relatively low cost.
John Roebling
Build railroads
Normally, bridges are built by governments, and therefore it is the government which operates them. But it is possible for a private company to build and operate a bridge as well.
arch bridges
Vertical Integration
Bridges
How do you constructed bridges?
you can build small mini bridges out of straw
Yes. Congress has the power to build bridges, establish post offices, and impeach the president if nesseccary
they really did build the bridge
18
bridges...
You don't have to build bridges over imaginary rivers; you only have to imagine them.