Crossfit Games 2012 - Clean Ladder Workout

Complete the following every 30 seconds for as long as possible:
Clean, 1 rep

Begin with 245 pounds and add 10 pounds every 30 seconds (or scale as needed). The workout is finished when you cannot complete the clean within the time limit.

started with 45, went 10# but not always within 30 seconds due to single bar but not extra break, 145 max, 155 fail