They used prestressd concrete and steel
The Juscelino Kubitschek Bridge in Brasília, Brazil, attracts approximately 14 million visitors annually. This iconic bridge, known for its unique design and architectural significance, serves both as a vital transportation link and a popular tourist attraction. Its striking appearance and scenic views make it a favored destination for both locals and tourists alike.
name of the materials
The current (1973) bridge is a prestressed concete box girder bridge.
it was made out of iron and steel
* Steel * Concrete
Steel and stone.
boggies
metal(steel), bricks, concrete
If technology you mean "materials"that was used for the bridge, then I found a good answer on Yahoo! answers, just type in this: "What materials were used to make the golden gate bridge?" The question is answered by Horatio, and he had a pretty good answer.
The current London Bridge is a pre-stressed concrete box girder bridge.
A Cantilever bridge is built from iron, structural steel and prestressed and reinforced concrete. These materials make the trusses, box girders, vertical columns and the canitlever itself.
cardboard,thermocol,4 motor's ,ice-cream sticks,thread(black)