Hardest summer job I ever had was at the Nashville Bridge plant in Bessemer, AL. It was hot, dirty and dangerous. Big crane-loads of loose steel going overhead all the time.
One of the jobs a mag drill couldn't do there was to ream vertical joining plates. To join two sections, each end has a plate with punched undersize holes. The two sections were positioned and tapered pins driven in a couple of holes. Two helpers @ $1.65 an hour minimum wage, would take a big drill motor with a tapered reamer and all day long ream the hole through the two or three steel plates, drive in a pin, ream the next hole, drive in a pin. That job would make a man of one if there was enough building material there. More than one guy didn't last out the first day.
Once all the joining plate holes were reamed, then the hot rivet crew would permanently join them. Watching a hot rivet crew is high iron ballet. Another lost art.
jack vines