A property of iron metal which makes it suitable for buildings big bridges that must support heavy weights

is its high tensile strength. Iron metal has a high strength-to-weight ratio, making it capable of withstanding large loads and supporting heavy weights without bending or breaking. This property allows iron to be used in the construction of large buildings and bridges that need to support significant loads. Additionally, iron is durable and resistant to corrosion, making it ideal for long-term structural applications.