Shipbuilding in iron and steel / a practical treatise . . rder to illustrate the system followed, we will take as an exampleone of the midship bulkheads of the iron-clad frigate plating is -^q inch thick, with the exception of the upper strakes,which are \ inch ; it is worked flush ^\ith T-iron bars 4^ by 2^ by^ inches as horizontal seam-strips, and single-riveted plate butt-straps. Vertical angle-iron stiffeners 3 by Z\ by ^^ inches areworked at intervals of four feet on the opposite side of the bulkheadto that on which the T-bars are fixed. This arrangement isidentical with Mr.
Shipbuilding in iron and steel / a practical treatise . . rder to illustrate the system followed, we will take as an exampleone of the midship bulkheads of the iron-clad frigate plating is -^q inch thick, with the exception of the upper strakes,which are \ inch ; it is worked flush ^\ith T-iron bars 4^ by 2^ by^ inches as horizontal seam-strips, and single-riveted plate butt-straps. Vertical angle-iron stiffeners 3 by Z\ by ^^ inches areworked at intervals of four feet on the opposite side of the bulkheadto that on which the T-bars are fixed. This arrangement isidentical with Mr. Mackrows plan as far as the horizontal T-iron Chap. XL Btilkheads. 221 stiffening bars are concerned, but differs from it in having platebutt-straps and a different arrangement of vertical bulkhead proper is bounded by the inner bottom and thevertical wing-passage bulkheads; but, in order to complete it betweenthese bulkheads and the frames, a partial bulkhead is fitted,the outer edge of which laps upon and is riveted to the Fig- 156. The sketch in Fig. 15G affords an illustration of a bulkhead inwhich the plates are placed with their greatest length vertical, and 222 Bulkheads. Chap. XI. gives an example of the mode of construction practised in somevessels belonging to the French mercantile marine. It is taken fromthe Traite Pratique de Construction NavaU by M. de vertical joints of the plating are lapped, and the horizontaljoints worked flush, and connected by plate butt-straps workedon the opposite side to the vertical stiffening bars. By this meansthe vertical stiffeners are worked directly on the plating, and no] liners are required. Two horizontal \ angle-iron stiffeners are also shown j\ in the sketch ; these are placed at fji ° j ?? _ ^ C^ ^^ height of the decks and plat- ^l~y ^ ^ forms in most cases. It will be y^ remarked, from the horizontal sec- tion of the bulkhead ejiven in ? Fig. 157 ? Fig. 157, that the plating is a
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Keywords: ., bookcentury1800, bookdecade1860, bookpublisherlondo, bookyear1869
