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.
The strongest metal commonly used in building construction is steel, particularly structural steel. It has a high tensile strength, making it ideal for supporting heavy loads and withstanding various stresses. Steel can also be alloyed with other elements to enhance its strength and durability, making it a preferred material for skyscrapers, bridges, and other structures. Its combination of strength, flexibility, and resistance to corrosion contributes to its widespread use in construction.
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