They used prestressd concrete and steel
name of the materials
The current (1973) bridge is a prestressed concete box girder bridge.
it was made out of iron and steel
Steel and stone.
* Steel * Concrete
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.
cardboard,thermocol,4 motor's ,ice-cream sticks,thread(black)
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.
The material that made the Cape Cod Canal Brige was steel.