Abstract :
Three cranes were used to lift this 360,000-pound welded-construction spiral casing and speed ring for the fifth Shasta dam hydraulic turbine to a 40-foot boring mill in the Allis-Chalmers shops. This casing measures 50 feet across. It is constructed in seven sections with riveted buttstrap joints. Its speed ring portion has an 18-foot inside diameter. The inlet section has an inside diameter of 12 feet 8 inches, and is made of 1⅞-inch plates. Upon completion the unit will be shipped to join four other Allis-Chalmers turbines at Shasta. Each of these is rated 103,000 horsepower at 138½ rpm under a 330-foot head.
