I don't care it might be galvanised iron are you happy now go away
Steel
Granite
bridges are colapsing because they are old and the material that the people used is old or the people that built it did not build it right
Due to repeated stress and strain, the material used in the bridges loses elastic strength and ultimately may be collapsed. Hence, bridges are declared unsafe after long use
The primary building materials in cable-stayed bridges are steel, which is used in the cables and also as the reinforcing material in the concrete, which is the other primary building material.
it is used so when sunlight falls on the bridge and it will expand so it will no crack
The Romans used the arch to build large buildings and bridges.
the first roller coaster was made of wood.
Cement was used by the Romans to build the colosseum. The Romans invented cement and the material they invented was also water proof which allowed for bridges and fountains to be built.
Roller blinds can be either transparent, translucent, or opaque, depending on the material used. Transparent roller blinds allow light to pass through while providing some privacy, translucent roller blinds filter light and offer moderate privacy, and opaque roller blinds block light completely and provide maximum privacy.
plastic
the answer is steel