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Welded Channel Tank Tops, Side Tanks and Bulkheads carriers on the Great Lakes have been reconstructed during the past winter under the welded channel system of construction. These ves- sels are the steamers MicuicGan of 11,000 tons deadweight capacity, and the Joriet of 10,000 tons déadweight capacity, owned by the Cleveland Cliffs Iron Co., of Cleveland. The steamer MicHIGAN is having installed a new welded channel tank top, and three welded staggered channel screen bulkheads. This work was done at the Huron docks by the Cleveland Stevedore Co. The steamer Jo.Liet is having installed new welded channel side tanks, and new intermediate side shell frames. This vessel is of longitudinal con- struction, and as in the case of all lake ships of this construction where the spacing of the web frames has been twelve feet, it has been found desirable to install new 18-inch channel frames between the original web frames, from the turn of the bilge to the main deck, in order to strengthen the side shell of the vessel. The ship will therefore have a frame spacing on the side shell every six feet. - This work is being done at the yard of the Interlake En- gineering Co., Cleveland. These instal- lations are based upon the perform- ance of the previous channel instal- lations, which were made in_ the steamers IsPHEMING and C. O. JENKINS during the winter 1929—30, and in the steamers GRAND ISLAND and CotoneL, during the winter of 1928— 29. It has been found in lake vessels that the side tanks receive nearly as much abuse as the tank tops, and in renewing side tanks heavier construc- tion is used than originally. In the Steamer Joximt welded channel side tanks were not only installed to meet local abuse, but to give more longitudi- nal strength to the Ship, as all chan- nel strakes run for and aft, and for the full depth of the side tank. Cargo hold or screen bulkheads as they are termed, have also received their share of abuse in past years, and new designs have been developed which eliminate all transverse stiffen- ers that were constantly being bat- tered and broken down by clam shell unloaders. The latest design of cargo hold bulkheads, are of the staggered channel type, in which a combination of welding and riveting has been used. A picture of this type of bulkhead is Shown on this page. . During the past eighteen months, more electric welding has been used In the steamers ISPHEMING, C. O. JENKINS, Micwigan and Jor, than many other large American ships, T HE fifth and sixth bulk freight either built or building, and the work has been satisfactory. The design of this work and its supervision was carried out by W. G. Bartenfeld, vice president and man- ager of the Channel Steel Hull Corp., Cleveland. Appoint Standing Committee Authorized by Conference Chairman T. V. O’Connor, of the United States shipping board, on April 3 made the following an- nouncement: “The fourth’ national conference on the merchant marine, held in Washington last January, authorized the appointment of a standing com- mittee, not less than five in number, to take such initial steps as might be necessary to carry into effect the res- olutions adopted by the conference, to decide upon the merits of the rec- ommendations contained in the vari. ous addresses, to follow up those that are deemed meritorious, and to make a report of its work to the next annual. conference. “It has been felt that this com- mittee will have an unusual oppor- tunity to perform constructive serv- ice for the American merchant ma- rine, and considerable thought has therefore been given to the selection of its members in order that it will represent not only the more impor- tant interests comprising the ship- ping industry, but also the chief geo- graphical sections of the country. The following named persons have signified their willingness to accept membership on the committee: T. V. O’Connor, chairman United States shipping board; Ernest Lee Jahneke, assistant secretary of the navy; H. B. Walker, president, American Steamship Owners’ associ- ation; H. Gerrish Smith, president national Council of American Ship- builders; George A. Marr, vice presi- dent Lake Carriers’ association; J. C. Rohlfs, president Pacific Ameri- can Steamship association; Malcolm M. Stewart, chairman Middle West Foreign Trade committee; Joseph T. Lykes, president Lykes Brothers Co., Inc.; ‘Robert <C. ‘Tuttle; manager, marine department, Atlantic Refining Co. “Although the precise date has not yet been fixed, the first meeting of the above standing committee will be held in the near future. The shipping board’s edition of the proceedings of the fourth nation- al conference on the merchant ma- rine is now available for distribu- tion. Copies may be secured by ad- dressing the United States shipping board, Washington. Offer Consulting Service on Steel Castings The Steel Founders’ society re- cently established a Development Engineering department, headquar- ters 932 Graybar building, 420 Lex- ington avenue, New York, with a competent engineer and metallurgist in charge. The principal function of this divi- sion will be to develop’ new uses or new applications for cast steel as well as to serve all industry in a consulting capacity with reference to metal construction problems, where cast steel is being or can be used. This consulting service is offered without bias and at no charge to mechanical engineers, machine and equipment designers and others re- sponsible for the specification of ma- terials and their proper utilization in metal products of all sorts. One of three staggered channel screen bulkheads installed in C. O. Jenkins MARINE REVIEw—M ay, 1931 45