LEGO bridge

Me and my friend (Joel Bettis) finished working on this camelback truss a few days ago.

I would have built a bowstring truss instead except, legos don’t bow.

Those of you who haven’t read Building Big By David Macualy ask “What is the difference between a camelback truss and a bowstring truss?”  Well before I explain that you must understand a simple thing about building bridges; if you secure a board on both sides and put weight in the middle it will bend.  This makes the top part a little bit smaller (so, it is under compression) and the bottom part a little bit bigger (which puts it under tension).  And, if either of these forces are too great, for the bridge, it breaks.  A bowstring truss however has a bottom that bows up so when weight goes across it, it straightens out but does not sag.

About Spencer

I'm Spencer. I'm in to politics, martial arts, and technology. Find out more about me here.
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One Response to LEGO bridge

  1. Grandma Kathie says:

    Hi Spencer
    I like the information provided in your blog. I did not know the difference betweeen a bowstring and camelback truss…now I do. Keep learning!
    I look forward to your next posting. Grandma Kathie

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