Shipbuilding in iron and steel / a practical treatise . . n in the section inFig. 200, so that the edge riveting shall work in as fastenings inthe stiffeners. In masts where the plating is worked flush at the 262 Iron Masts. Chap. XI\ edges it is nsual to have tlie stiffeninp: bars of T-iron, and to placethem, as shown in section in Fig. 201, so that they shall serve asedge strips. In order to still further stiffen masts the flanges ofthe stiffening bars are often connected by braces or horizontalstays, formed of T or angle-iron, or of plate. In addition toadding to the strength of the mast th
Shipbuilding in iron and steel / a practical treatise . . n in the section inFig. 200, so that the edge riveting shall work in as fastenings inthe stiffeners. In masts where the plating is worked flush at the 262 Iron Masts. Chap. XI\ edges it is nsual to have tlie stiffeninp: bars of T-iron, and to placethem, as shown in section in Fig. 201, so that they shall serve asedge strips. In order to still further stiffen masts the flanges ofthe stiffening bars are often connected by braces or horizontalstays, formed of T or angle-iron, or of plate. In addition toadding to the strength of the mast these cross-stays also affordthe means of climbing up inside for the purpose of inspecting,cleaning, and painting it. A section showing a mast constructedwith T-iron stiffeners and plate stays is given in Fig. 202, whichillustrates the arrangements adopted in the masts of the Defenceand other of the earlier iron-clads. These plate stays areplaced at intervals of from 4 to 6 feet. In some masts theplate stays are arranged as shown in Fig. 203, a bent plate. r\ rN^ r \ u \ Vj ,1 Fig. 202. Fig. 203. Fig. 204. forming two parts and a separate plate the remaining Grantham gives a section of a mast, from which Fig. 204 istaken, and in whicli there are four plates in the circumference,the seams being flush-jointed and the stiffeners, formed of T-barsplaced as usual upon the seams. The plate cross stays in thisinstance are placed in diametral planes, being riveted to theflanges of the T-irons, and connected witheach other at the centre of the mast byshort angle-irons. In the Kesistance themasts were constructed as shown in sectionby Fig. 205. There are four plates inthe circumference, the edges being flush-jointed, and covered by T-iron intervals of 10 feet the stiffeningarrangement shown in the sketch isfitted, consisting of a ring of angle-ironworked in short lengths between the T-iron stiffeners and con-nected by a horizontal stiffening plate p.
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Keywords: ., bookcentury1800, bookdecade1860, bookpublisherlondo, bookyear1869
