crossbeam
/ˈkrɔsˌbim/
noun
- A horizontal beam that goes across a structure, such as a roof, ceiling, or bridge, to support weight or connect parts.
- Workers installed a steel crossbeam to strengthen the bridge's framework.
- A wooden crossbeam stretched across the ceiling, supporting the floor above.
- The old barn's crossbeam was made of thick oak and held up the entire roof.