iron ore
11,000 tons of steel, Cornish granite and Portland stone.
because steel is strong:)
metal(steel), bricks, concrete
They used prestressd concrete and steel
metal steel
I weighs 98,000 tons
70,000 tons of steel, Cornish granite and Portland stone.
11,000 tons of steel.
The material used to build the bridge was wood and steel
None. The current London Bridge, built in 1973, is a pre-stressed concrete structure.
Steel and concrete.
Steel