loading
The popsicle stick bridge is a classic science demonstration and competition. Every year many students world-wide build bridges made soley from popsicle sticks and glue, to see which designs can hold the most weight.

We built one, using maybe 140 sticks, give or take a few. Not expecting it to hold much weight, we were surprised by how strong it ended up being! (results in last step)

Step 1: Design your bridge

There are many ways to build bridges, both real bridges and popsicle stick bridges. Do some research, be creative, and remember - triangles are strong.
A triangle spreads out weight and is much more stable than a simple rectangle or square support. Be sure to incorporate lots of triangles into your bridge design. More popsicle sticks doesn't necessarily mean a stronger bridge.

In fact, according to the internet, "If there is a single most important shape in engineering, it is the triangle. Unlike a rectangle, a triangle cannot be deformed without changing the length of one of its sides or breaking one of its joints. In fact, one of the simplest ways to strengthen a rectangle is to add supports that form triangles at the rectangle's corners or across its diagonal length. A single support between two diagonal corners greatly strengthens a rectangle by turning it into two triangles."[link]

My design consists of two main bottom supports, and two across the top, and then a lot of triangles across the sides, the top and bottom, and going from the bottom of one side to the top of the other. Very similar to the one in the diagram.

Draw your design on paper, and estimate the number of sticks you will need.
Be creative with your design!
<p>Mine held 492 lbs! Anyone held that much?</p>
<p>i have held 900lbs</p>
<p>Bro 900? Where did you get all the weight? Your mom? ???</p>
<p>your so rude where did u come from uh uh!</p>
<p>wtf!!! WOW!! are u lying and did u use popsicle sticks and glue or stone and cement !WOW</p>
<p>i did it</p>
<p>how much weight can it hold?</p>
<p>Which bridge design do you think is the best to hold to most weight? Or is it rather the complexity of the bridge that holds a lot of weight?</p>
<p>try a combination of different types of bridges.</p>
<p>Still some free shovacado!</p>
<p>How about using a glue gun for steps 3-5? It dries faster!</p>
But it won't stick as wet as wood glue.
<p>free shavocado!</p>
<p>kys</p>
<p>kys</p>
<p>And all credit to this is maker if i win Thanks for the idea!</p>
<p>Is anyone else doing this?</p>
<p>I am gonna make this in toothpicks i hope it woks</p>
What makes the bridge contain a ton of weight?
<p>I just did our school's annual Busta Bridge Competition - I am the reigning champ, and have been for 2 yrs. since i started doing this</p>
<p>For all theclash of clans players http://maxclashgems.com Strongest clans get gems from here! (xpfFb)</p>
<p>I need to make a bridge of physics!!! Now i have an idea of what i can do.</p>
<p>how long did your bridge become? </p>
<p>Thanks for this project. Its working out great so far!</p>
<p>Is it ok to use ordinary glue? and What are those gray things on the side of the bridge to hold it up?</p>
<p>how much did your bridge weight</p>
<p>Is it okay to use ordinary glue?</p>
<p>AWESOME thats really cool! also congrats nicholas</p>
<p>OMG THIS PROJECT WAS SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO GOOD I WON 1ST PLACE IN STATE AND WON 200 DOLLARS TY SO MUCH!</p>

About This Instructable

1,112,154views

128favorites

License:

Bio: Ask me questions. I know the answers.
More by drinkmorecoffee:15 Minute Bamboo Easel Homeschool Science 6 Cent LED Throwie 
Add instructable to: