Finished marking off positions of stiffeners. Measured length of stiffeners. Cut stiffeners to proper length using straight tin snips. Used one stiffener as template and marked off 6" to be trimmed. Trimmed all stiffeners using band saw. Numbered stiffeners 1-7 to go on right side and 8-14 on left side. Cleaned up all stiffeners using Scotchbrite wheel.