Problem No. 4
Clarifications as of Dec-01, 2017
B7c - Cross section of balsa wood used in the structure: As indicated in the problem, commercial cuts vary. The cross sections are 1/8" x 1/8" (0.32 cm x 0.32 cm) with a maximum allowance of either dimension of 0.135" (0.33 cm). In addition to the variance for the maximum dimensions are minimum dimensions. The minimum dimension is 0.115" or 0.31cm x 0.31cm in one or both dimensions. Any piece that does not have a cross section between 0.31cm x 0.31cm to 0.33cm x 0.33cm will be considered a prohibited piece.
B7c - Cross section of balsa wood: The requirement of 1/8" x 1/8" cross section allows for manufacturing variations in commercially cut balsa sticks. Teams are not allowed to deliberately reduce the cross section below 1/8" x 1/8" across any length for any purpose other than joining pieces of wood where they intersect. If, after a team has completed weigh-in, its structure is overweight and time permits, the team may alter sticks to meet the 15 gram weight requirement [B6b]. Final interpretation of intent and compliance is at the discretion of the tournament weigh-in officials and/or problem captain.
Current members can submit questions using the membership number and the school's zip code. Please remember the cutoff date is February 15th, 2018. No questions will be answered if received after that date. However, it is possible that we will post general clarifications after that date. Be sure to check clarifications up until the date of your competition.