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
70,000 tons of steel, Cornish granite and Portland stone.
I weighs 98,000 tons
metal steel
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