Catching Rivets on the High Iron

This morning on the way into work I began thinking about the iconic photo of 1930s ironworkers eating lunch on a girder apparently suspended 69 stories over New York. Seems someone else shares my belief that the photo, though real, isn't *quite* as dangerous as it looks:

http://depletedcranium.com/were-steel-workers-really-this-reckless/

Remember, old-time skyscrapers had a stepped structure.