Union protests have become more common in the city as the flagging economy has increased unemployment in the construction trade. Non-union sites that normally would have been too small to be worth protesting, like the Milkboy Cafe at 12th and Chestnut, have become targets. The Goldtex site was simply too big to pass up. Picketers appeared at 12th and Wood as well as a separate Post Brothers development on Rittenhouse Street in Germantown that had been under construction with a mixed crew.
(via At Goldtex, Union Dominance In Construction Called Into Question | Hidden City Philadelphia)