popsicle_suspension_bridge3

I have always wanted to build a model suspension bridge, and finally I have finished one. This is a popsicle stick suspension bridge. I created it from scratch, coming up with the design on my own. After testing it to failure I learned quite a bit about how suspension bridges react to loads. This model suspension bridge uses popsicle sticks as the main building material. The decking is cardboard, and the “cables” are 550 parachute cord (military surplus)

Popsicle Stick Suspension Bridge

I have always wanted to build a model suspension bridge, and finally I have finished one. This is a popsicle stick suspension bridge. I created it from scratch, coming up with the design on my own. After testing it to failure I learned quite a bit about how suspension bridges react to loads. This model suspension bridge uses popsicle sticks as the main building material. The decking is cardboard, and the “cables” are 550 parachute cord (military surplus).

Testing the Suspension Bridge

Here is the video of the bridge being tested to failure. I have two different angles showed right after each other. I think this video is very enlightening as to how a suspension bridge reacts to a load.

It appears that the bridge failed due to uneven loading. The weights leaned to one side, and I over-corrected as I kept adding weights.

I did not come up with a good method of securing the cables to an anchor. You will notice in the movie that the ends of the bridge lifted up as the middle bent down, until a certain point where the ends of the deck pressed up against the cables themselves. If I were to do this again, I would have the cables already pressing down on the ends of the deck to help secure it in place. I think this would provide much better support to the bridge rather than what I did.

This suspension bridge was very flexible, as you can tell from the video. I read an article about building model suspension bridges that said it was difficult to get them flexible enough. Also, I did not have any hangers (vertical cables hanging off the main cables) on this bridge. I did not make any mostly because of the great difficulty in making them even and I did not know a good way to attach the hangers to the main cables. In real life, the cables are metal and have metal clamps and other devices that make this process easier. But I was using parachute cord.

Plans for this Suspension Bridge

Do you want to build a model of a suspension bridge? They sure are fun and are great to look at when you are finished. My models are always functional, which means you can test them as well. While I do not have blueprints for this particular suspension bridge, I do have plans for a smaller one. You can check them out here:

Suspension Bridge Blueprints

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17 Responses to “Popsicle Stick Suspension Bridge”

  1. wyatt - May 7, 2010 at 10:18 am

    how many popsicle sticks did you use?

    • Garrett Boon - May 19, 2010 at 9:55 am

      Wyatt, I used 64 sticks for the deck, 7 sticks to connect the deck, and 76 for the towers. That is a total of 147 popsicle sticks.

  2. Brad - May 12, 2010 at 9:37 pm

    That’s sweet Garrett, I am stoked you built it.

  3. Ellejae - May 19, 2010 at 4:32 pm

    This bridge is sick man!!!!!!!!!!!!!!!……I have a project about bridges, me and my partner Carolina are doing a Suspension Bridge and we’re gonna try to do this!!………..It’s really cool how you made it!

    • Jeff - November 29, 2011 at 2:17 pm

      me too! me jake and tom are building a suspension bridge and we would love to use your model!!!!! we’re too stoked about it!

      • tom - November 30, 2011 at 1:59 pm

        yeah jeff i am so stoked too!!!! this bridge will be impenitrable!!!!!!!!!!! our bridge will never break

  4. savanna - October 18, 2010 at 3:15 pm

    i’m doing a science fair project and i have to create a suspension bridge. Hoe did you construct this one?

  5. Unnamed1414 - April 23, 2011 at 5:26 pm

    Please? how did you attach the string?

    • Garrett Boon - April 27, 2011 at 6:05 pm

      Good question. I had hard time knowing how to attach the strings. On the bridge itself I simply fed the cord through the deck popsicle sticks in the center of the span. On top of the towers the cords are not attached at all, but just slide through grooves that hold them from sliding off. To anchor the cords down on the ends of the bridge I used lots of weights from wood and cement blocks.

  6. pavan - November 16, 2011 at 7:28 am

    i have to know the complete steps of designing popsicle sticks suspension bridge..

  7. g - January 18, 2012 at 6:51 pm

    do you have a step by step video or directions of the actual construction of the bridge?

  8. Tommy - March 30, 2012 at 8:46 pm

    Soo cool!!,
    I’m trying to figure out a way to make one strong enough for a model train that is HO gage, i would like it to be wide enough for to tracks. Thank you very much for the inspiration!

  9. joe joe - April 14, 2012 at 10:50 pm

    What would you recommend using to cut the popsicle sticks?
    I tried scissors and I also tried a box cutter, but neither of them seemed to be effective. If there is something you used that worked, what is is?

    • Garrett Boon - April 16, 2012 at 6:23 am

      I use a little craft saw blade. I have heard that little fiskar shears work well, but have not tried it myself.

  10. Abdullah - April 17, 2013 at 5:39 am

    I have been given to make a suspension bridge 2 n i am workin on it!

  11. Arthur - December 2, 2013 at 12:15 pm

    Hey,

    I’m working on a science fair project, and this really helped me. But I would like to have a list of the materials needed for this exiting experiment!

    Thank you and I hope you will send the materials soon, because I need them soon.

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