Crews cleaned up glass that spread out for almost a block on Congress Avenue and covered parts of a parking lot adjacent to the building, near Third Street and Congress.
The Austonian, which some have described as a giant USB stick, is a 56-story condominium tower at Second Street and Congress Avenue, and at 683 feet tall, became the tallest skyscraper in Austin when it opened in 2010.
In October 2011, pieces of glass fell from the downtown high-rise after an unknown object hit an exterior window on the 45th floor, officials said at the time. No injuries were reported.
The object hit the window on the building's east side, Austin Fire officials had said.
Earlier that year in June 2011, the nearby W Austin Hotel & Residences briefly closed after eight panes of glass shattered and fell from balcony railings more than 200 feet above the street. Four people were injured.