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june, 1914 arrangement and to do this it is nec- essary to have a plate 37!% in. The rivets are 34 in. diameter and as six diameters of the rivets apart is ample for making this water tight floor tight and resist the water pres- sure to the load water line. . The riveting is arranged through the cen- ter keelson with the same pitch. Section through No. 12 shows the riveting as arranged and all the sec- tions forming the girder. The watertight floor here shown is of no importance in this considera- tion but it shows that no precaution has been taken to make this other than the weakest section for it will be observed that the watertight transverse member is joggled over the top and bottom angles on the center keelson. The keel plate is 37% in. wide x 11/16 in. thick and by deducting 10 rivet holes 1 in. long leaves a valua- tion of 18.875 xX 26 tons per square inch = 490.75 tons. Example: Keel plate 37.5 in. X 11/16 in. -- 10 rivet holes 15/16 in. diameter countersunk equal tol in, lost: area: - 3/5 ---" 10 me 27.5. 2/.5 X- 11/16 me 1S R/S Sg. in, 18.075 X26: =. 4907/5: tons tensile strength of keel plate at weakest part. Center keelson is 36 in. deep x 6/16 in. thick with top angles 3 in. x 3 in. x % in. thick and bottom angles 4 x 4 in. x 7/16 in. thick. There are eight rivet holes punched out in the plate, reducing the plate to 36 in. -- 8 x A5-16 in. == 29:5. in: ane area of the plate = .29.5 x 3% = 11.06) sq. in: _first trip of the season. THE MARINE REVIEW FILGe Kee me 6.62. 1 7 te rivet holes == -4.87 sq. in: 7 Top angles 11.25 x 34 = 4,22 -- 1.22 for rivet holes--=3sq. in. Rider plate is 41.5 in. wide and by deducting ten countersunk rivet holes leaves 31.5 in, = 315 307/16 eX 6 8875 ans tensile strength. . Strength through keel, center keelson and rider plate is? Area of tion. Keel: (Plate 23 he ee "18.875 Center Keelson 4 ss ee ae 18.93 Rider: Plate os ie ee 13-75 Total serene Gee 51.43 Tensile strength in tons, Keel SBlate sii 8 aig ven 490.75 Center Keelson (in. eae eee 492.18 Rider. Plates. oor, ee ee ee 357.50 otal eRe eo 1340.43 The steamer George F. Baker, of the Pittsburgh Steamship Co.'s fleet, down- .bound from Ashland with ore, has the misfortune to run ashore near Eagle river, Lake Superior, during a dense fog on her first trip of the season. The wrecker Favorite was rushed to her and after jettisoning about 1,000 tons - of ore, was released and taken to Port- age for an examination. She later delivered her cargo at Fairport and went to Lorain for repairs. The steamer Benjamin Noble foun- dered with all hands off Duluth on her Lake Superior was swept by a heavy northwest gale, accompanied with snow, and the Noble was apparently unable to make out the harbor lights. It is believed that she tried to turn around and _ foundered 229 ian canal dimensions and was built by the Detroit Ship Building Co. at Wyan- dotte in 1909, Geo. M. Black, secretary and trea- surer of the Detroit & Cleveland Navi- gation Co., died at Detroit on May 5. DER 'Secrion Fro. /2. He had been for many years actively identified with a number of Detroit enterprises. The Racine-Truscott-Shell Lake Boat Co., Muskegon, Mich., launched the cruiser Monomey for the United States The area of the angles = 7.58 X in doing so. The Noble was of Canad- Engineer's Office on May 5: RIDER FLATE TANK _END 4 r : - : r T 7 1S : al pet. iis i f nee (ee ot te a SOs Nee Sel eect anor oun 4 ' FORE PEAK. ! 1 pete WH 'a t in it L if pda LiL af a ) a --_------ e a a "2 A 70 9 8 2 6 f Ss 4 WT 4 0 CENTER AEELSON | JE) 3. "i e 73 73 Te W WT Core Boor : = po 3 A ' v Pee SF es ve ae rn Lg e win, i, ; i -- D -- iL : 4 70, , : a El Tl Tl ee eereer ree - 3. . 3 2 Zaas ---- --e 7 eee i T A 5. BM ie I ; 2. --| 5 - 5 q o Code ee a a Ss Be Ft weg Re : Oe TR Se Se OES a : FINE ET ie aula OT Ee ah eh "TER IN A GREAT LAKES SHIP YARD IN A FEW HOURS anne He ¢ 4