Steel Ships; Their Construction and Maintenance a Manual for Shipbuilders, Ship Superintendents, Students and Marine Engineers

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...ship, viz., promenade deck, upper deck, main deck, and lower deck, all of which are wood sheathed. The boat and orlop decks have wide stringers and tie plates, and are laid with wood decks. The beams to all the decks are of the butterly tee bulb section, with the exception of those at the end of the promenade deck, which are bulb angle. The promenade deck amidships is supported on T section steel stanchions, which are brought down to the sheer strake, and form stiffeners for the bulwarks (see midship section, fig. 76). The frames extend continuously from the tank margin plate to the upper deck. The centro through-plate and tank margin plate and some of the side girders being continuous fore and aft, the floors must be intercostal between these longitudinals. At the fore end, where, on account of the high speed, severe panting stresses are encountered, the frames are doubled for a considerable distance abaft of the stem. Doublings are also fitted to the frames for a considerable distance forward of the stern post, where great stiffness is required to carry the propeller brackets, through which severe stresses are transmitted, especially when the vessel travels at high speed. Double angle bar frames are fitted to all watertight bulkheads. In all steam vessels, owing to interruptions in transverse strength caused by the omission and cutting of beams in the machinery space, too much attention cannot be given to the matter of compensation for such weakening of the structure, and to so strengthening this locality that no signs of weakness may be developed, and vibration reduced to a minimum. It is also necessary to ensure that the foundation upon which the engines and boilers rest is of the most substantial character. In such vessels as the "Campania" a...