• WordNet 3.6
    • n keelson a longitudinal beam connected to the keel of ship to strengthen it
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Webster's Revised Unabridged Dictionary
    • n Keelson (Shipbuilding) 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.
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Century Dictionary and Cyclopedia
    • n keelson A line of jointed timbers in a ship laid on the middle of the floor-timbers over the keel, fastened with long bolts and clinched, thus binding the floor-timbers to the keel; in iron ships, a combination of plates corresponding to the keelson-timber of a wooden vessel. See cut under keel.
    • n keelson In iron ship-building, a longitudinal reinforcement of plates and bars in the interior of the vessel above the framing in the bottom. The center-line keelson, or center-keelson, is immediately over the keel, and is frequently built in combination with it. The simplest form is a girder entirely on top of the frames riveted to the reverse bars. The girder is formed of various combinations of plates, bulb-plates, and angle-bars. A box-keelson is one in which the plates and angle-bars are combined in a form of rectangular cross-section. A flat-plate keelson is formed by a flat plate laid on top of the frames and riveted to them and to the vertical keel-plate. There may be additional reinforcements of bars above the flat-plate keelson, or there may be a center-line bulkhead above it. (See cut at keel, 2.) An intercostal keelson is one built up of a series of intercostal plates between the frames, the upper edges of which project above the reverse frame-bar and are riveted to a line of continuous plates and bars above the frame. A side-keelson is one in the bottom on either side between the center-line and the turn of the bilge. A bilge-keelson is one just below the turn of the bilge near the heads of the floors.
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Chambers's Twentieth Century Dictionary
    • n Keelson kel′sun an inner keel placed right over the outer keel of a ship, and securely fastened thereto.
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Webster's Revised Unabridged Dictionary
Akin to Sw. kölsvin, Dan. kjölsviin, G. kielschwein,; apparently compounded of the words keel, and swine,; but cf. Norweg. kjölsvill, where svill, is akin to E. sill, (n.)
Chambers's Twentieth Century Dictionary
Sw. kölsvin, Norw. kjölsvill, the latter syllable=Ger. schwelle, Eng. sill.


In literature:

I was driving bolts in the hold, through the keelson, with Hays.
"My Bondage and My Freedom" by Frederick Douglass
We are going to place the keelson, and a dozen pair of hands would not be too many.
"The Mysterious Island" by Jules Verne
Everything has been moved in the hold, from stem to stern, and from the waterways to the keelson.
"Two Years Before the Mast" by Richard Henry Dana
I know him from truck to keelson.
"Mary-'Gusta" by Joseph C. Lincoln
And besides, he was rigged out from main truck to keelson in the nobbiest clothes that ever saw a fo'castle.
"Some Rambling Notes of an Idle Excursion" by Mark Twain (Samuel Clemens)
Under the boiler and engine there was only room for one keelson.
"The South Pole, Volumes 1 and 2" by Roald Amundsen
We are going to place the keelson, and a dozen pair of hands would not be too many.
"The Secret of the Island" by W.H.G. Kingston (translation from Jules Verne)
Mine from truck to keelson she is, and I'm master of her.
"The Wind Bloweth" by Brian Oswald Donn-Byrne
The keelson is an inverted keel inside the vessel.
"All Afloat" by William Wood
Otherwise they are the same as sister-keelsons.
"The Sailor's Word-Book" by William Henry Smyth

In poetry:

Her rigging it was once of the best a man could find;
With canvas of the stoutest her lockers they were lined;
But now from truck to keelson she's stinted shamefully,
For want of tar and seizing, a sight she is to see —
Poor old ship!
"Poor Old Ship (Regent's Canal Dock)" by Cicely Fox Smith

In news:

The keelson is Oregon pine.