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256 steamship, Atlas, also belonging to the Standard Oil Co., the barge was par- tially righted and assumed the position shown in Fig. 6. Pumps were then lowered on the port side to pump out the water and by keeping a strain on the tripods the barge was finally right- ed. The barge sunk on May 13 and was raised and placed alongside a wharf on June 21. Her cargo consisted of 22,000 barrels of oil, out of which 21,- 000 barrels were saved. DETAILS OF STEEL TRIPODS AND PIPE CONNECTIONS USED IN RAISING STAND- ARD OIL BARGE NO, 91. Through the courtesy of the Willa- . mette Iron & Steel Works, Portland, Ore., we are able to present herewith detailed drawings of the steel tripods used in rasing Standard Oil Co, barge THE Marine REVIEW top of the tripod.. The cables were reeved through the chock and fastened solidly on the port side of the barge. The tripods were designed to carry a load of 100 tons. As is shown in Fig. 1, the principal member is a 10- in. 35-lb. I-beam. This beam bore the majority of the thrust. A 12-in. I-beam 7 ft. long is riveted to the heel of the 10-in. member. This beam distributed the load over at least three frames and: prevented the ship's side from buck- ling. : The amount of stress to which the tripod was liable to be subjected was rather indefinite as the conditions of righting could not be accurately fore- seen. As a result one of the tripods was buckled by a load considerably in excess of 100 tons. It was estimated that the stress amounted to 200 tons before the structure. gave way. After this partial failure, and in a bent con- _and the whole was lowered into the wa- August, 19 diver to unscrew these plugs and jn. sert some kind of a connection in the hole. The connection had to be in- serted and made tight quickly and it was not practical to ft a thread yn- der water. The elbow and length of pipe necessary to reach the surface : were screwed to the fitting in Fig, 2 ' ter, The fitting consists of a 6-in. | pipe provided with two internal dogs held in place by a 16-in. flat spring. Open- ings in the pipe allow the dogs to pro- ject outside. The outer part of the q connection and water tight joint was _ made by screwing a_ special notched brass nut 10% in. in diameter down on a steel plate ring and a \%-in. rubber gasket, the nut being screwed down by a special spanner with a _ handle 4 ft. in length. The diver unscrewed the plugs in ' " B RIVETS 3700 BOLTS Itc. 1--Deratrs or Street Trivops Usep 1n RIGHTING THE No. 91, which foundered near the Co- lumbia river bar, May 13, 1909. When the barge was brought to the surface she lay on her beam ends, starboard side up. In order to get a suitable purchase for the tackle used in righting the barge these tripods were erected on her side to carry the cables. A heavy chock (not shown in the drawing, Fig 1) was bolted to the dition, the tripod sustained considerable load. : Fig. 2 shows the pipe connections designed so they could be quickly fit- ted to the oil tanks by a diver while under water. The openings in the oil tanks which were to be pumped out were a considerable distance below the water line and were stopped with screwed plugs. It was necessary for the CAPSIZED BARGE, the tanks and forced the plain end of the connection through the hole. The dogs, held out by the spring, collapsed sufficiently to slide through and were then forced out against the inner side of the tank plate. The outer nut was then screwed down. This connection can be quickly applied under water and proved very useful in wrecking the barge,