Or kelson, a longitudinal strengthening timber(s) which rests upon the floors and is generally bolted through the floor timbers to the keel in wooden ships In many vessels the keelson also takes the maststep When additional timbers are laid alongside the keelson, these are termed sister keelsons; those laid atop the main keelson are termed rider keelsons In composite, iron or steel ships, the keelson may be either a simple I beam, or flat plate keelson; or a box configuration
A piece of timber in a ship laid on the middle of the floor timbers over the keel, and binding the floor timbers to the keel; in iron vessels, a structure of plates, situated like the keelson of a timber ship
a small strip of wood running along the centerline on the inside of the bottom of a boat It adds longitudinal strength to the boat
Class: ~ Details: A reinforcing structural member of the keel which is on the inside of the hull