Steel
The primary building materials in cable-stayed bridges are steel, which is used in the cables and also as the reinforcing material in the concrete, which is the other primary building material.
The Romans used the arch to build large buildings and bridges.
why is basalt used as building material
Linen
The most common materials used in bridge building are generally steel or concrete for larger bridges, and stone or wood for smaller bridges.
Steel and concrete.
Leather is considered to be the most durable material for luggage.
Granite
Urbanite is broken up concrete used as a building material.
bridges are colapsing because they are old and the material that the people used is old or the people that built it did not build it right
limestone
Granite is often used as a building material.