Bridge Challenge Logbook

Name:

Date:

🧭 Part 1: Understanding the Challenge & Planning

1. In one sentence, state the design challenge (include the required span):

2. Success criteria — tick all that apply:

Bridge spans 30 cm

Stays within supplied material limits

Supports the greatest possible load

Remains stable under load

Aesthetic design

Completed within time limits

3. List three key constraints (materials, time, safety). Add a short note for each:

4. Engineering Design Process — tick each stage as you complete it:

Ask

Research

Imagine

Plan

Create

Test

Improve

Communicate

🔬 Part 2: Research, Design & Testing

5. Matching — Draw lines to match each bridge type with a typical advantage or disadvantage.

Beam

Truss

Arch

Suspension

Good for short spans; simple to build

Efficient load distribution; needs many members

Strong in compression; complex foundations

Long spans possible; sensitive to tension failures

6. Structural forces — in one sentence each, explain how the following affect a bridge:

Compression:

Tension:

Shear:

Torsion:

7. Final design sketch — draw and label the main load-bearing elements (use the box):

8. Testing & calculations

a) Mass of your bridge (grams): ________

b) Maximum load supported (kilograms): ________

c) Calculate structural efficiency (maximum load ÷ mass). Show working:

9. Testing method & variables

a) Independent variable: ________________________

b) Dependent variable: ________________________

c) Two controlled variables: ________________________ , ________________________

10. Evaluation & improvement — briefly state one strength of your bridge and one improvement you would make next time:

Bridge Challenge Logbook

Bridge Challenge Logbook

🧭 Part 1: Understanding the Challenge & Planning

🔬 Part 2: Research, Design & Testing

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