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What bridge design holds weight? – garrett', I’ building balsa bridge span 36″. hold 25lbs centered. criteria winning hold 25lbs efficiency. initial thought arch super structure overlaps main chord, warren webbing( post sketch helps).. 20+ balsa wood bridge images wood bridge, bridge, Dec 23, 2016 - explore kathleen colbath' board "balsa wood bridge" pinterest. ideas wood bridge, bridge, bridge building..
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