Intercostal-keelson

Is formed of a continuous range of plates, fitted vertically between the various floors as far forward and aft as practicable; having their upper part connected to a bilge-, side-, or middle-line-keelson, and their lower edge fastened to the outside-plating by short fore and aft angle-bars, the ends of each are in some ve els moreover secured by vertical angle-bars to the floors. See Plate 19.7.