In this guide
PRACTICE PROMPT
Use this fictional setting to practise clear reasoning. It is not an assessment or institution paper.
The setting
A footbridge deck 30 m span, 3.5 m wide, in steel.
Your task
Size the main girders and check pedestrian-induced vibration.
What a useful response would show
A frequency estimate and a comparison against a comfort criterion.
Reflect afterwards
- What assumption mattered most?
- What would you check before using this on a real project?
- Could another engineer follow your recommendation?