Balsa Wood K Truss Bridge

By on May 12, 2009 -- Modified on October 4, 2016

Here is a bridge using the K truss design made from Balsa wood. This bridges uses a combination of end and lap joints. You can see that where the slanted members of each K join together at the vertical member, there is an end joint. At the top and bottom chords, the joint is a lap joint. This bridge does not have any lateral bracing on the top, which is something I would highlight to change. The performance of this bridge would be greatly increased with that lateral bracing.

What do you think about this bridge? Is there anything you would have done differently?

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8 thoughts on “Balsa Wood K Truss Bridge”

  1. Fun making bridges right! Mila and Alina (me) are making a bridge for school science fair project.

    By Alina -- March 5, 2017
  2. Cool bridge!Wonder if I can build it to?!

    By Mila -- March 5, 2017
  3. Wow! This is very good!!!

    By Ally -- February 6, 2017
  4. I like your bridge. I am on a challenge of building a balsa wood bridge on October 16 2016 in alaska

    By Elicia jones -- October 16, 2016
  5. It’s such a complicated design but the Quebec Bridge over the St. Lawrence river in Canada is a amazing example of this type of bridge.

    By Chris -- April 5, 2012
  6. hi,
    well i liked your bridges and i was hopign if i could know the measurements of the bridge and how long it took you and if it could hold alot of weight?

    By amy -- May 24, 2010
  7. hi there..I I have seen all this bridge pictures…and if you dont mind would you …give me how we can define the hight of the if we use the angle 60 degrees from the bottom if that correct or no..? thanks for your attention

    By Andika -- December 7, 2009
  8. how much wieght did it hold and what were the specifications for building it?

    By science olympiad student -- October 19, 2009

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