Specification for the 2008 State Conference, the span of the structure will be 12" in length (remember to add 2 inches to the length of the bridge to rest on the abutments).  The material for the structure consists of up to twenty (20) feet of 1/8" X 1/8" balsa.  The bridge shall be glued using cyanoacrylate (CA) glue only.  For more specifics on glue please refer to the Competitive Event Guide.   If you have questions, check in the Oklahoma TSA conference booklet that will be posted on the Oklahoma TSA website in December or call 1-800-522-5810 X 537.  For additional information and links see National TSA competitive event overviews.