USS Taluga AO-62..


It is reported that Taluga is the last Riveted Build Ship in the U.S. Navy
email: December 12, 2011 - Tommy Trampp SK3  USS Taluga



Excerpts from: Audel's Ship Fitters Guide



VIDEO:  Workers Rivet Side Shells during the construction of Liberty ship during World War II.

As useful as pre-assembly was in cutting production time, the real key to accelerated shipbuilding, however, was welding. Ships in World War I took longer to build than in World War II primarily because their hulls were riveted rather than welded. Welding had been introduced in American ships prior to 1918, although none had an entirely welded hull. Riveted ships were strong and durable. But riveted hulls had drawbacks. Chief among these was the time needed to align steel plates and drill holes for rivets, and to set and drive home the rivets. To place each rivet (150,000 for a typical hull) took two workers, one on either side of the plates being fastened. But to reach that point required the efforts of at least two other workers. A "driller" had to position each hole in the proper place and drill through the one-inch-thick hull plate. After the plates were aligned on the frames they seldom matched the pre-drilled holes precisely, so a "reamer" had to enlarge the holes to eliminate overlap and allow the rivet to fit. The combined weight of rivets needed to fasten hull and deck plates could add more than 300 tons to a ship's hull and subtract that weight from the vessel's payload. Strong as they were, rivets could pop loose under stress or when hull plates were damaged. Unless the exterior heads of the rivets were flush with the hull, they added drag that could slow the ship at sea.
From: National Park Service