How truss bridge balsa wood ehow, Measure two pieces of 1/8-inch balsa wood for the base of the bridge. cut your pieces of balsa wood using a ruler and a sharp utility knife. score the wood with moderate pressure several times. do not try to cut balsa wood in a single cut, as too much pressure will crush the edges of the wood.. 20+ balsa wood bridge images wood bridge, bridge, Dec 23, 2016 - explore kathleen colbath's board "balsa wood bridge" on pinterest. see more ideas about wood bridge, bridge, bridge building.. What bridge design holds weight? – garrett', I’m building a balsa bridge that needs to span 36″. it only needs to hold 25lbs centered. the criteria for winning is to hold 25lbs with the most efficiency. my initial thought was to make an arch super and sub structure that overlaps on the main chord, with warren or k webbing(can post a sketch if it helps)..
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