The warren truss uses equilateral triangles. the pratt and howe truss also uses triangles, but the triangles are slanted to change the distribution of weight. the k truss uses the same shape as the letter �k� to distribute weight. a model truss bridge can be made from balsa wood using any of these designs, or you can construct a truss. For this balsa wood bridge, i used a �k-truss� design with seven vertical members and 6 �k-trusses� per side. the k�s were the most challenging part of the build, because i had to calculate each ones length, and the approximate measure of the angle i had to cut into each one.. This short movie shows how to start and build the balsa truss for the challenge project.. Uncle dave's brass model trains - brass list How to build a balsa wood bridge - woodworking projects The balsa wood bridge designs for engineering class A truss is probably the best choice for a balsa bridge. the only alternative that i can think of is to make s...
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