The building of balsa-wood bridges is very often used as an educational technology. It may be Exceptionally strong bridges may take up to thirty minutes to test as weight a combination of steel . Balsa wood comes in a wide range of densities and stiffness. CA glue is a fairly strong, light, fast-drying glue used by many builders. 20. These bridge building tips will give you a head start when you start designing and .
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