Great Lakes Art Database

Marine Review (Cleveland, OH), September 1932, p. 21

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throughout except in way of the forward hold where it is increased to 8 feet at the collision bulkhead; lightened solid floors are fitted on every frame, spaced 36 inches apart reduced to 24 inches in way of the peak tanks. Reduc- tion in frame spacing is carried out gradually by one inch forward and two inches aft. Made up in one plate with double straps, the flat keel is 56 inches wide and the vertical keel is water- tight, except in way of double bottom tanks Nos. 1, 9 and 10 and is continuous between the peak bulkheads. There are three intercostal side girders on each side of the vertical keel amid- ships. In addition the oiltight wing longitudi- nal.bulkheads extend for the length of the boiler rooms and auxiliary machinery space. Fuel oil, fresh water, feed water and water ballast are carried in the 17 main tanks into which the double bottom is divided. The plat- ing in the bottom amidships is 38 pounds and the side plating 36 pounds carried up to the A deck. The A deck sheer strake is 34 pounds and the plating to the promenade deck is 32.4 pounds... Buttomhead rivets are used in the shell plating to a depth of about 12 feet below the strength decks in way of three-quarters of the length. Heavy doubling plates are fitted at the breaks of the decks and at all openings in the shell. Bilge keels 15 inches deep are fitted for a length of 250 feet. For side framing 12- inch channels have been fitted to E deck. This framing is reinforced in = holds 2 and 3 by 34-inch reverse bars. Channel frames of 8 inches are fitted above E deck. Watertight Bulkhead Subdivision ULLY complying with regulations of inter- national convention on safety of life at sea (1929) there are 11 main transverse bulk- heads. Four of the bulkheads in the forward end of the ship are watertight to B deck. The remaining bulkheads are watertight to C deck. Additional subdivision results from the longi- tudinal wing fuel tanks throughout the boiler and auxiliary machinery rooms, the longitudi- nal bulkhead extending to E deck. The top of the tanks are three feet below E deck. Fresh water wing tanks in way of the refrigerating machinery space extending up to the tunnel flat and the watertight tunnel flat over the shaft also give additional subdivision. It is con- servatively claimed that with three compart- ments flooded either fore or aft or with four compartments flooded amidships, the ship will remain afloat. T. S.S. MANHATTAN Fifteen horizontal sliding doors 30 inches by 75 inches have been fitted in the main bulk- heads in way of E deck. Bulkheads in machin- ery spaces are served by vertical sliding doors 30 inches by 54 inches. These doors are elec- trically operated by Cutler-Hammer units mounted at each door. Controls for operating the doors are located at each side of each door and in the pilot house from whence they may be operated separately or in groups as desired. There is also a hand operating gear arrange- ment which is automatically disengaged when the power unit is in use. Other watertight doors are of standard design with hand operated dogs. Shaped to suit bulbous bow construction, the stem of the vessel has a cast steel fore foot Ventilating System, Sun Deck weighing 34% tons. The upper part of the stem is of rolled steel, weighing 24% tons, and with its forward edges well rounded to avoid cutting of lines. The stern post, in three pieces, with a total weight of 43 tons, is a steel casting which together with the stem casting was fur- nished by the Sterling Steel Foundry Co. The rudder of balanced type is of double plate streamline design with cast steel frame in three pieces weighing 28 tons. The forge steel rud- der stock is 24 inches in diameter, weighs 24 tons and was fabricated by the Camden Forge Co. Spectacle frames of cast steel in two pieces weighing 73 tons was cast by the Penn Steel Casting Corp. Three large cargo holds are located aft of the forepeak bulkhead. Trunk hatches serve each hold. Quarters for the crew are located on E, D and C decks above the two forward holds. The mail and cabin baggage room, with the swimming pool in the center, are located MARINE REviEw—September, 1932 21

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