National Geographic : 1952 Jul
136 Indians Heat and Hammer Rivets for the UN General Assembly Building SMickey Snow, the heater of an all-Mohawk riveting gang, cranks a small hand blower on his furnace to force air through the glowing coals. Rivets, lying directly on the coals, must become malleable but not melt. When one is ready, Mickey picks it up in the tongs and tosses it (white blur in upper right) to a catcher, who receives it in a metal can. y After the rivet has been thrust into matching holes, Tom Lahache (lower right) leans against its head with a heavy steel dolly bar and holds it in place while Tom Jacobs caps the other end with a pneumatic hammer. Hot rivets must be hammered until, on shrinking, they fit tight. Safety helmets bear the initials of United States Steel and its subsidiary, American Bridge Company. Tom Lahache (with cigarette) demonstrates another popular use for a hot rivet.