In a barge the inwale connects the tops of the futtocks to provide the ledge on which the beams and carlings are rested. It is bolted through to the outer wale, which eventually would be flush with the double planking.
A wale (or "waler") is a horizontal supporting member of a concrete forming system, vertically reinforced by a "strongback".
- Kemp, Peter, ed. (1976). The Oxford Companion to Ships & the Sea. London: Oxford University Press. pp. 922–923.
- March, Edgar J (1948). Spritsail barges of the Thames and Medway. London: Percival Marshall. p. 99.
- The dictionary definition of wale at Wiktionary