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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)
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)
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Signing UpStep 1Design 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!
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!
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Judging Criteria:
The winner is determined by a point system as follows:
Complexity - 10 points : The number of purposeful members involved in the design.
Aesthetics - 5 points.
Engineering - 10 points : How much thought is placed into the design, where the connection points are and what member shapes are used in the design.
Workmanship - 5 points : A bridge that is "clean", such as nice glued edges, members matching at connections and nice sanded edges.
Efficiency - 30 points.
Rolling loads test- 20 points.
If anyone can help please mail me at pravinrox@gmail.com.
Heres the problem statement...
Construct a stable truss bridge of span 20 inches, height 5- 6 inches and internal width 4 inches with hollow and solid members (straws and Popsicle sticks) that sustains a minimum load of one kg.
The deck should be essentially made of straws. The loads will be uniformly/non-uniformly placed on the deck. The bridge will also be tested for its efficiency, rolling loads, complexity, aesthetics and workmanship. Paper (provided) can be used for joints consisting of three or more members.
The efficiency of the bridge will be calculated as follows-
Efficiency = Maximum load sustained by the bridge/Weight of the bridge.
Maximum use of straws is suggested as efficiency will be multiplied by the factor 'Number of straws/Number of Sticks used'.
But really, it's the triangles. Read the first couple steps.
thx
in my project the weight had to to held with a hook attached to the middle of the bridge. I am scared of the paddle pop stick which the hook is attached on won't hold the weight and snap. help please
im in school right now but yeahness its hott