Bridges are almost invariably built from steel due to its high structural strength, flexibility and relatively low cost.
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.
Maybe because if we build a train with non-metal it will not able to carry heavy loads which a train build with metal can easily do
John Roebling
2 line
some materials used in bridges are concrete, steal, metal [may rust and fall if metal ] the first bridge may or may not have been made of wood
Granite
arch bridges
because it's a tough matter
Calcium metal is extremely soft and brittle but the mineral calcium carbonate is already a component in many bridges and has been for about three thousand years. Calcium carbonate is a component of concrete. The Romans were the first to use concrete.
Bridges
Almost certainly, iron is our most common refined metal. Used in bridges, cans, autos, steamships, railways.
The government should encourage the use of slaves to build roads and bridges.
The government should encourage the use of slaves to build roads and bridges.
The government should encourage the use of slaves to build roads and bridges.
How do you constructed bridges?