Building Bridges

We built a bridge that could carry a load of 2 duct tapes for 1-2 minutes.  We used materials only provided by the teacher which were--10 straws. 1 meter string, 1 pipe cleaner, 2 of A4 paper,  500 cm long cardboard tube.

These were the bridges we designed and constructed--

Liezl, Losaline and Amy

Maranita, Mikayla and Ronan

Joshua J, Caitlyn and Faith

Kaydence, Joshua C and Amanda

Tino, Maira and AJ

Building a Bridge

Problem:

The problem was to construct a strong bridge that could hold 2 duct tapes for 1 minute.

Materials:

• 10 straws
• 2 A4 paper
• 1 Pipe Cleaner
• 1 cardboard roll
• 1 meter tape
• 1 meter string
• 1 Scissor
• 1 meter ruler

   Procedure:

1. We measured the cardboard roll.

2. We then cut it and placed it around 1 A4 paper (base).

3. After that, we taped the cardboard rolls onto the A4 paper which is the base of the bridge.

4. We folded the second A4 paper horizontally at the  ends of the paper to make the rails.

5. Then we connected 2 straws together for the rails. We did this two times.

6. We taped the rails on the both folded ends of the other A4 paper.

7. Then we got a straw and stuck it horizontally in the middle of the rails.

8. We attached a string that came down from the horizontal straws and the rails.

9. After we attached the string, we stuck some straws on the folds of the paper so it can support the span.

10. Then we stuck the paper onto the cardboard rolls.

11. We then tested our bridge by placing the 2 Duct tape on it. We timed it for 1 minute and it survived. It went a little over a minute.  

Conclusion:

We conclude that in order for our bridge to be strong and sturdy, it needs a lot of support on the top and on the bottom. When there is pressure on the top, it helps make the bridge stronger.

By: Liezl, Amy and Losaline