Shipbuilding in iron and steel / a practical treatise . . ughly connect the two sides and not to support the stem, thedecks and side plating furnishing all the strength that is considerednecessary for that purpose. The bows of the new Indian troop-ships are strengthened by a series of breast-hooks, the arrangementof which is shown in section in Fig. 76. The main deck is markeda, the lower deck h, and the breast-hooks c; while the longitudinalframes which extend forwardto the bow are marked d, andthe platform below the lowerdeck is marked e. The de-tails of a portion of one of thebreasthooks e
Shipbuilding in iron and steel / a practical treatise . . ughly connect the two sides and not to support the stem, thedecks and side plating furnishing all the strength that is considerednecessary for that purpose. The bows of the new Indian troop-ships are strengthened by a series of breast-hooks, the arrangementof which is shown in section in Fig. 76. The main deck is markeda, the lower deck h, and the breast-hooks c; while the longitudinalframes which extend forwardto the bow are marked d, andthe platform below the lowerdeck is marked e. The de-tails of a portion of one of thebreasthooks e are given inplan in Fig. 77, from whichit will be seen that the platesare scored in between theframes, and connected withthe frames and outside platingby staple angle-irons. Anillustration of the arrange- ^ ment of the breasthooks of the vessels of the Noij^humberlandclass is given in Fig. 82, page 108, and will be described furtheron. It may be remarked here, that one great difference betweenit and the arrangement first described is that the breasthook. 86 Transverse and fLongitudinal Chap, v. plates are fitted in between the frames, and so a direct connectionis made between them and the outside plating similar to thatobtained in the troop-ships just described, while at the same timethe folding-back of tlie frames in case of the vessel being usedas a ram, is effectually prevented. The employment of diagonal ties on the frames of iron vesselshas been proposed by many individuals, and patents have beentaken out for various modes of fitting them. In a wooden ship thenecessity for their adoption is evident, as they serve to preventlongitudinal bending and vertical racking in the structure, andespecially to resist the change in the relative positions of theplanks and frames, which the former kind of straining tends toproduce. But in an iron ship which has the plates of the skinriveted to each other, so as to form an almost perfectly unitedmass, there is no possibility of the slidin
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Keywords: ., bookcentury1800, bookdecade1860, bookpublisherlondo, bookyear1869
