The Chicago Tribune:

For the Bulls and Blackhawks to share the floor at the United Center, it takes a choreographed conversion from ice to hardwood and back again — something that will happen 26 times this season. Once a Blackhawks game ends, the crew of 45 springs to action, changing the playing surface in about two hours.

The time lapse video is pretty neat. It’s amazing the whole thing is done in about two hours.

via The Loop