Why are girders made from steel?

Girders are typically made from steel due to its high strength-to-weight ratio, which allows for the construction of strong yet lightweight structures. Steel is also durable and resistant to deformation, making it ideal for supporting heavy loads over long spans. Additionally, steel can be easily fabricated and welded, facilitating efficient construction and design flexibility. Lastly, its resilience to environmental factors ensures longevity and reduced maintenance costs in various applications.