This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ...arranged, these iron riders are very efficient aids against hogging strains, which are those most injurious to wood ships. When hogging takes place, the ends must drop relatively to the middle, a change of form which would bring the iron riders under tensile strains, the kind of strains which they are ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ...arranged, these iron riders are very efficient aids against hogging strains, which are those most injurious to wood ships. When hogging takes place, the ends must drop relatively to the middle, a change of form which would bring the iron riders under tensile strains, the kind of strains which they are best fitted to resist. Against compressive strains these thin narrow bands of iron cannot be nearly so efficient as against tensile strains, so that, as commonly fitted, riders are not of much service against sagging strains, except amidships, where the two systems overlap one another. It is amidships that the severest strains are experienced, so that the crossing of the riders there is a great advantage. Composite ships of the mercantile marine were usually built with a single thickness of planking, and consequently needed diagonal strengthened. One common plan of fitting these was to have rider plates riveted outside the iron frames, and inclined 45 degrees to the vertical. The upper ends of those riders were attached to the sheer strake, and the lower to another detached longitudinal tie, formed by a strake of plating worked at the bilge. Composite ships of the Royal Navy are built with their outside planking in two thicknesses. The edge-seams of the planks in the inner thickness are each covered by a plank of the outer thickness; the seams of the outer thickness are similarly covered by the planks of the inner thickness. A strong edgewise connection is thus made in the double skin, and consequently diagonal rider plates are dispensed with. Other composite ships have been constructed with the skin planking in two thicknesses, one or both of which had the planks worked diagonally; it was then unnecessary to fit diagonal rider plates to...
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All Editions of Manual of Naval Architecture for Use of Officers of the Royal Navy, Officers of the Mercantile Marine, Yachtsmen, Shipowners and Shipbuilders
