Which popsicle sticks Bridge Design is
stronger and hold the most weight?
When I was younger I went to a bridge
class and we built truss bridges and
learned about lots of other types of
bridges. We had to follow the directions.
We used popsicle stick and hot glue, and
after words we went out and tested them.
It turned out that mine had held the most
weight. I was wondering if it would do it
again and why. We also got fore extra
sticks to put anywhere we wanted.
A bridge is a structure built to span over a valley, road, water or
other physical obstacle, for the purpose of providing passage
Three types of bridges are: beam bridges, cables
and truss bridges.
There is tension and compression on a bridge.
The act or process of compression
The act or process of stretching something tight
a watertight, dry chamber in which people can work
a structural element formed from steel wire bound in
a simple type of bridge made of horizontal beams
supported by vertical posts
a vertical supporting structure such as a pillar
a projecting structure supported only at one end
Longest suspension bridge in the world is the Akashi Kaikyo
I predict that the bridge with the six extra
sticks will hold more weight than the one
without the six extra sticks because the
one with the six extra sticks distributes the
Hot glue gun
1. Gather all materials.
2. Make the two different bridge designs; Truss
3. Test the two different types of bridge
4. Use saw horses to put the bridge on.
5. Put a lease on the bridge to hold the bucket.
6. Put white rocks in and see how much it hold
until it breaks.
7. Record the results and how much they held.
8. Clean the mess up.
Which bridge designs is better? Two
types of trusses (one with more sticks
than the other in the design)
How much weight each bridge will hold?
I will make the two bridges out of the
same materials, same glue and test
them both the same.
Test Bridge: 6.8 pounds
Bridge with extra sticks held: 16.6 pounds
Bridge with no extra sticks held 9.8 pounds
I found that the bridge with extra sticks held
more weight then the other. It also broke in more
spots then the other bridges. I think why it broke
in more spots was because the weight was
distributed better and used more of the sticks to
hold the weight.
Next time when I do a test on other types
of bridges I will use the same amount of
sticks and try harder on getting the glue
the same amount on each bridge.
I really observed that when it started to
crack and break, they all twisted in the
middle but none of the sticks broke.
This could help people who design
bridges. They could see where a bridge
needs to be stronger. Like on my bridges
they both could be stronger in the middle
and with more glue.
Possible Causes of Error
I did not build them on the same day and my
mom helped me build some of them.
Sticks not in the same area.
Glued in different spots and not the same
amount of glue.
Some of the sticks were not stick were not glued
The rock piled differently each time.
The way the bridges were placed on the saw
In the future I think it would be fun to test
different types of bridges and with different
I want to think my mom for helping me
build my bridges and for getting the bridge
book so I could build the bridges.