Shipbuilding in iron and steel / a practical treatise . . frame abaft the bulk-head, and this is the general arrangement followed by theprincipal merchant-shipbuilders. It will be readily understoodfrom the horizontal section given in Fig. 157, page 222, where theliner is drawn in black for the sake of distinction. In the iron-built vessels of the Eoyal Navy it is also usual to increase thebreadth of the liners at the bulkhead frames, but not to as great anextent as is customary in vessels of the mercantile marine. In the Hercules the liners overlap the transverse frames about 3 inches,and tak
Shipbuilding in iron and steel / a practical treatise . . frame abaft the bulk-head, and this is the general arrangement followed by theprincipal merchant-shipbuilders. It will be readily understoodfrom the horizontal section given in Fig. 157, page 222, where theliner is drawn in black for the sake of distinction. In the iron-built vessels of the Eoyal Navy it is also usual to increase thebreadth of the liners at the bulkhead frames, but not to as great anextent as is customary in vessels of the mercantile marine. In the Hercules the liners overlap the transverse frames about 3 inches,and take a row of rivets on each side of the frame. * These linersare marked e, e in Fig. 153, page 207. In the ncAV Indian troop-ships the liners at the bulkheads are made broad enough to taketwo rows of rivets on each side of the frame angle-irons. Coming now to the illustration of some jjroposed modes ofsecuring bulkheads, we hrst call attention to the arrangement shownin Fig. l(jl. This was patented by Mr. Hodgson in 1851), and con- Chap. XI. Bulkheads. 21. Fig. 162. sists in working the bulkhead into two parts near the side, andmaking them diverge so that their flanged outer edges may beattached to the reversed angle-irons on two successive frames, andthus make watertight joints. The second plan, shown in , was patented by Mr. Eae in1860. It will be seen, on referenceto the sketch, that the bulkheadframe is formed of a broad flangedT-iron, of which the arms are suf-ficiently broad to allow^ the rivetsin the bottom plating to be placedzigzag fashion. The athwartshipflange of the T-iron is rolled threetimes the usual thickness, and isgrooved on the inner edge. The bulkhead plating is worked flushand fitted into this groove, its fastening consisting of through-rivets, as shown in the sketch. The proposer also patents theuse, in wake of bulkheads, of broad-plate liners inside the bottomplating, combined with corresponding plates on the outside, thelatter being thinned away at
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Keywords: ., bookcentury1800, bookdecade1860, bookpublisherlondo, bookyear1869
