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Bridge Testing Data Sheet

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Bridge Testing Data Sheet

Jai, Oliver and Mei have built a prototype footbridge for a new theme park ride. Their brief was to make a bridge that spans 30 cm, stays stable during a gentle side push and supports at least 500 g. They added weights in 100 g steps, checking the bridge after each addition. Read the test record, then use its evidence to answer the questions. Treat the results as a fair test: the same bridge, span and loading method were used each time.

Load added

Observation

Result

100 g

No visible change

Held

200 g

No visible change

Held

300 g

Deck bent slightly at the centre

Held

400 g

More bending; joints stayed connected

Held

500 g

Noticeable bending, but bridge remained intact

Held

600 g

A joint began to separate

Failed: unsafe to load further

Read the evidence

Use details from the bridge test record in your answers. Technical words you may find useful include load capacity, stability, force, tension, compression, bending, joint and structural failure.

1.What was the greatest load the bridge safely held, and did it meet the brief’s 500 g load requirement?
2.Which statement best describes the bridge’s stability during the gentle side push?
  • It collapsed as soon as it was pushed.
  • It wobbled slightly, then returned to its original position.
  • It did not move at all.
  • It twisted and stayed out of position.
3.Fill in the blanks using the test record: The first visible bending was at the of the deck. At 600 g, a began to separate.
4.True or false? The bridge failed before it reached the required 500 g load. Give one piece of evidence for your answer.
TrueFalse
5.Match each engineering term to its meaning.
  • Load capacity
  • Stability
  • Structural failure
  • The ability to stay balanced and return to position after a disturbance
  • The greatest load a structure can safely support
  • When a structure or one of its parts can no longer safely do its job
6.At 300 g, the deck bent slightly but still held. Explain what this observation suggests about the bridge, using the word force or load.
7.Based on the results, identify one strength of the design and support your choice with evidence from the test.
8.Propose one specific modification to improve the bridge. Explain how it could address the bending or the joint separation observed in the test.
9.The team wants to compare a modified bridge with this prototype. Name one test condition they should keep the same and explain why.
10.Write a brief test conclusion that states the maximum safe load, the main failure point and one improvement the team should try next.

3 printable pages

  • Bridge Testing Data Sheet, page 1 of 3: Read the evidence

    Page 1

  • Bridge Testing Data Sheet, page 2 of 3: 3. Fill in the blanks using the test record: The first visible bending was at the of the

    Page 2

  • Bridge Testing Data Sheet, page 3 of 3: 9. The team wants to compare a modified bridge with this prototype. Name one test…

    Page 3

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