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The Older term is, and still widely used Hammer Head Cranes- from the shape. They were initially used in Ship construction in Europe and England. a German shipyard had the record-breaking ( Kaiser Bill) which could hoist 340 tons- a record for this crane type- in the early years of the past century. They were comparitively rare on fixed ground construction sites , say in the Interwar years- but this may have been a cause and effect of the Depression economy- these things are expensive to build- and operate. so-called Center-hung derricks- still in use- were more common. these had the drawback the man running the hoist had to follow telegraph bell signals( something like a marine telegraph)- but from his duty station could not see the load- the crane operator and rigger, could, of course.
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