Engineering Design Challenge: Bridge Lab

THE CHALLENGE

CHALLENGE MODE

LIVE DESIGNSIDE ELEVATION / SCHEMATIC

Warren truss · 8 sections · steel

Member stressLow → high

TEST LOAD

0 kN

02 Make your prediction

BEFORE EVERY TEST

I think my bridge will…

Fail immediatelyBend significantlyBarely passComfortably pass

Which part is most vulnerable? (optional)

Choose a prediction to unlock the test.

YOUR ENGINEERING NOTEBOOK

Design history

Compare tested iterations. Load a previous design to revise it; each test keeps its original constraints.

Attempt / design	Cost	Mass	Capacity	Safety factor	Result	Compare / revise
Your first test starts the story. Build, predict, then test.

05 / EXPLAIN YOUR THINKING

Engineering reflection

REQUIRED TO FINISH

Use evidence from at least two tests to explain how your design changed.

Teacher settings Scenario, assumptions & difficulty

Apply changes to begin a new constraint round. Earlier attempts retain their original conditions. Settings and notebook are saved on this browser when storage is available.

App titleScenarioSpan (m)Budget ($)Required traffic load (kN)Minimum safety factorEnvironmental limit (points)Difficulty preset

Allow “Show the Math”

Active challenge modes (choose at least one)

Material assumptions

Educational indices. Strength is relative; impact is points per model m³, not CO₂. Keep at least one material available.

Available	Cost ($/m³)	Density (t/m³)	Strength index	Impact (pts/m³)