Thanks xdet.

Reminds me of the inside of a prison. I'm surprised at how clean it is if the photo is from 1926. Looks like it was taken when the shop was newly built.

Go to amazon.com and check out this book:

http://www.amazon.com/Rational-Facto...01&sr=8-1#noop

The Rational Factory by Lindy Biggs. Use the "Search Inside" feature and go to page 123. That's where he explains the features of the craneway in the "new shop". The chapter about the new shop starts on page 118.