Sentence Examples


  • Derrick cranes are made of all powers, from the timber I-ton hand derrick to the steel 150-ton derrick used in shipbuilding yards.
  • Derrick cranes are made of all powers, from the timber I-ton hand derrick to the steel 150-ton derrick used in shipbuilding yards.
  • The derrick crane introduces a problem for which many solutions have been sought, that of preventing the load from being lifted or lowered when the jib is pivoted up or down to alter the radius.
  • Somewhat allied to the derrick are the sheer legs (fig.
  • Obviously, nearly every kind of crane can be made portable by mounting it on a carriage, fitted with wheels; it is even not unusual to make the Portable Scottish derrick portable by using three trucks, one under the mast, and the others under the two back legs.

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