1. A large beam, typically made of steel or iron, used as a main structural support in buildings or bridges
The bridge's main support comes from steel girders.
O suporte principal da ponte vem de vigas de aço.
2. Any strong beam or bar used to support weight or provide structural rigidity
The building's girders were reinforced after the inspection.
As vigas do edifício foram reforçadas após a inspeção.