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Message: [QUOTE="sutomcat, post: 3291068, member: 27"] There are 36 columns, which means there are 36 box girders that comprise the crown truss. The north, south, east and west walls all have 6 columns. The 4 diagonal walls each have 3. 4 * 6 = 24 4 * 3 = 12 Right now we have 3 of the 8 walls completed. 4 box girders were needed to do the 2 diagonal walls and 5 were needed to do the north wall. 4 * 2 = 8 5 * 1 = 5 By my count, we have 13 of 36 done. So I don't think we are halfway done but we are getting close. Hopefully we will see a spiral or two in the air soon and get the ball rolling on building the east and west sides of the crown truss. [/QUOTE]