Glue three small squares of white oak to one red-oak strip--one square in the middle, and one on either end. Repeat the process for three more strips of red oak and the remaining nine squares of white oak. Let the glue dry.
To use the jig, place two of the wood strips underneath the work pieces, on either side. Place the other two wood strips directly above the bottom strips, on top of the work pieces. Insert carriage bolts and wing nuts through the slots between white oak squares. The carriage bolts should be positioned at the ends of the work pieces. Tighten the nuts to hold the pieces together.