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Hulls Built of Steel Channels are and Lighter Stronger CEUTA LATERAL CELLO CUAA LOL Increased Deadweight Capacity and Structural Strength for same Dimensions — Lesser Cost of Construction ATCURTTUUHTTURTTETTURETTLEAL ELGG LOA LLOALE BY WILFORD G. BARTENFELD Te Channel Steel Barge Co.., Rome, N. Y., is the pioneer in the development of the channel steel system of hull construction, pat- ented by Mr. Louis Henley, and this company has up to the present time turned out four different types of hulls, under this system. The first channel steel hull con- structed was .completed in 1922, and this vessel was a 500 tons hopper sand barge, 116 feet long, 22 feet beam and: 10 feet 6 inches molded depth. This first hull, however, was not: constructed entirely of steel chan- nels, as a 6-inch piece of yellow pine planking was placed between each strake of channel, and the fastening bolts were run through the wood planking and flanges of the channels. Before this hull was launched, it was allowed to rest on just the end block- ings, 95 feet between the blocks, for 24 hours, and it was also balanced on just the midship block. No signs of deflection or straining were noticed in either test. This first hull, a combination of steel channels and wood construction, proved so suc- cessful, that soon after its comple- tion and trials the state of New York placed an order with the Channel Steel Barge Co. for an all steel hop- per dump scow of tunnel type, and of 125 cubic yard capacity. This scow is 100 feet long, 22 feet beam and 5 feet 6 inches depth. The chan- nels used in the dump scow are 15 The author, W. G. Bartenfeld, Lorain, O., is the Great Lakes representative of the Channel Steel Barge Co., Rome, N. Y. {Channell steel hopper dump scow of tunnel type for the State of New York-—Capacity 125 cubic yards inches in width by 33.9 pounds per foot and of structural steel section. Those used in the first hull were 12 inches by 20.7 pounds per foot struct- ural steel channels. Both the sand barge and the dump scow have been given hard usage and each hull has lived up to expectations and guaran- tee. A Variety of Hulls Built The next hull to be constructed un- der the channel system was a small ferry boat 40 feet by 16 feet by 5 feet. This was also constructed entirely of structural steel channels of 12 inches by 20.7 pounds per foot scantlings. This boat has been in service for about four months, and the owners state that she has given excellent service. END VIEW OF HOPPER DUMP SCOW SHOWING TUNNEL AND CHANNEL STRAKES The latest and fourth hull turned out under this system is a deck lighter for the United States war de- 362 partment, corps of engineers. It is 100 feet in over all length, 30 feet beam, and 6 feet molded depth, and has a 1 foot sheer at both ends. There is one watertight centerline bulkhead, and four transverse watertight bulk- heads. This lighter is made entirely of 12 inches by 20.7 pounds per foot structural steel channels, with the ex- ception of those used in the bilge, which are 15 inches by 33.9 pounds per foot structural steel channels. This lighter has recently been placed in commission on the Niagara river, and it is expected that her perform- ance will quite equal that of the previous hulls. One of the outstanding features of these hulls, is that no riveting passes through the outer shell. The decks, sides, bottom, and ends of the outer shell are as smooth as a_ plastered wall. This will of course reduce the hull resistance to a small extent, will render the hull less susceptible to damage than with the usual con- struction, as there are no butt straps, and because the flanges of the chan- nels on the inner shell form longi- tudinal and transverse girders which give tremendous stiffness and offer great resistance to buckling. The absence of riveting through the outer shell of course makes the hull less susceptible to leakage, and no rivets can be started by the hull rubbing against docks or concrete walls. The corners of the hulls at the deck and bilge are rounding and formed by bending the webs of the connecting channels to any desired are. This oe CP SEE” Sena 4 : q a 3