Span iron

(Naut.) a special kind of harpoon, usually secured just below the gunwale of a whaleboat.
- Halliwell.

See also: Span

References in periodicals archive ?
Once had the largest single span iron and glass roof in the world at 65m wide ?
The two sides have executed the agreement to work towards an aggregation arrangement and allied transactions (agreement) which would span iron ore production from the respective firms' projects and may incorporate infrastructure and transportation solutions as agreed between the parties.
When it opened in 1796, it was the largest single span iron bridge in the world.