Below are listed the center axial centers of gravity for Vulcan Offshore Hammers.
Note: Tip dated 1 August 1980. Some Vulcan sales people also carried the chart below. Keep in mind that the weights for the pipe cap are probably before the “Light Weight High Strength” pipe caps begun in the early 1980’s. The hammer distance from the top and the leader weights are also probably conditioned by the Vulcan leader design before the “Light Weight Pipe Construction” leaders started in the early 1980’s. The chart below was intended to be more informative to those who were doing calculations for the “pipe stickup” requirements of API RP2A, which was the main purpose of the center of gravity data in the first place.
- W1 = Weight of hammer, striking parts, and typical pile cap (lbs.)
- D1 = Distance from top of pile to center of gravity of hammer (ft.)
- W2 = Weight of leaders or guide cages (lbs.)
- D2 = Distance from bottom of bell to center of gravity of leaders (ft.)
|530 Steam (54″ Jaws)||67860||8.5||16850||20.0|
|530 Steam (80″ Jaws)||89680||6.7||29700||24.1|