Initial Stages of Construction I

 
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These hammers were used to drive the pilings into the seafloor so that they could act as legs for the Air-Sea Interaction Tower (ASIT). Clockwise from left: the hydraulic vibratory hammer clamped to the lip of the pipe, the crane then lifted it with the pipe attached, positioned it, and vibrated it into the sediments. The sleeve end of this 20,000-pound deisel hammer was placed over the pipe, fuel was injected and its "piston" hammered the piling to 50 ft of embedment. Photos by Marga McElroy