What design small bridge , Well, having a background in boats, auto, space station design & building construction, layered with crossing patterns. the grain of the wood going one way on one layer and on the next be 45 to 90 degrees off angle. standard plywood construction.. Balsa wood bridge building tips.docx - 25 bridge, 16. draw out your bridge on graph paper to make sure that it is symmetrical. 17. different trusses have different ways of spreading out the load. 18. wood has about the same strength in tension, no matter how long it is. 19. ca glue is a fairly strong, light, fast-drying glue used by many builders. 20. balsa wood sands very easily.. What bridge design holds weight? – garrett', I need to build a small truss ( about 75cm span length between supports, and a maximum height of 25cm) using balsa wood and glue. it evaluated according to the best strength to weight ratio. strength being the load that my truss can hold and weight being the weight of my truss..
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