Wow. Attached is a fascinating doc going through the specs and construction process of this feat https://web.archive.org/web/20120227025023/http://files.asme.or

Wow. Attached is a fascinating doc going through the specs and construction process of this feat https://web.archive.org/web/20120227025023/http://files.asme.org/asmeorg/communities/history/landmarks/5488.pdf https://web.archive.org/web/20120227025023/http://files.asme... It has pictures!