The word "keelson" is spelled with two "E"s, despite only one being pronounced. This spelling anomaly is due to its origin from the Dutch word "kilsen", which was borrowed into English in the 16th century. The second "E" was added to conform to English spelling conventions, despite not being pronounced as a separate vowel sound. In IPA phonetic transcription, the word is /ˈkiːlsən/, with the first syllable pronounced as "kee" and the second syllable as "sən".
A keelson is a nautical term referring to a structural element found in the construction of ships and boats. Specifically, it is a longitudinal beam or timber that is positioned along the centerline of the vessel, running parallel to the keel. Located on the lowermost part of the hull, the keelson provides additional rigidity and strength to the ship's framework.
Typically made of sturdy and durable materials, such as wood or metal, the keelson is an essential component of the vessel's structure. It serves several vital functions, including distributing the weight of the ship evenly across the keel, preventing excessive flexing or twisting of the hull during navigation, and reinforcing the integrity of the overall construction.
Due to its strategic position and placement, the keelson can effectively reduce the potential stress and strain on the keel, especially in larger ships. Additionally, it helps to maintain the ship's longitudinal shape and prevent the hull from sagging or bending over time.
In shipbuilding, the installation of the keelson is typically one of the primary steps in the construction process, firmly fastening it to the frames or ribs of the vessel. Its importance in enhancing the strength and stability of the ship's structure has made the keelson an indispensable element in maritime engineering for centuries.
The piece of timber lying upon the keel into which the mast is stepped; false-keel, a strong piece of timber bolted to the bottom of the real keel.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "keelson" has its origins in the Middle English word "kelson", which was derived from the Old English "cenlsyn". It can be traced back further to the Old Norse word "kjalnes" or "kjolnaus", meaning "keel beam". The "keel" refers to the main structural member running along the centerline of a ship's hull, and the "keelson" is an additional structural timber or steel beam located above the keel to strengthen and provide further support to the structure.