Metals and Alloys

Metals and Alloys

Steel has become the primary structural material for bridges due to its light weight, strength, durability, ease of maintenance and construction, low erection costs, and resistance to natural disasters such as earthquakes. New high-performance steels introduced in the 1990s have superior strength and corrosion resistance.

Puring molten steel.

Hot-dip galvanizing

Modern anticorrosive paints provide a protective coating for decades

Another technology for protecting steel in bridge construction is a process known as metallizing where aluminum or zinc is sprayed onto a cleaned steel surface to form a 30-year protective coating.

Did you know?

The Golden Gate Bridge is the second longest suspension bridge in the United States of America, spanning the opening of the San Francisco Bay into the Pacific Ocean, reaching a length of 1,600 meters. The weight of the roadway is hung from two cables fixed in concrete at each end. Each cable is made of 27,572 strands of wire. Its durability is well proven by the fact that it withstood an Ms. 7.1 earthquake without any major damage.
Part of the main cables of the Golden Gate BridgePart of the main cables of the Golden Gate Bridge