The Chartership Forum

Learning / bridge engineering

hanger

Vertical hanger force

Lesson review: expert verification remains open

This lesson has received a full-context editorial review and a check of its technical explanations. Selected arithmetic has been checked separately. This is not independent engineering sign-off.

Checks needed for project use

  • Bridge component studies and adjustable examples still need an independent bridge-engineering review, including applicability, load models and detailing guidance.
  • Specialist review remains for: Use a coupled deck–hanger–primary-system model. Check whether asymmetric loading unloads a hanger and whether vibration is important. The hanger calculation is a local idealisation; it does not verify the displayed bridge or applicable design requirements.

These are educational models and exercises. Check their assumptions before using the results. The full technical content and every diagram have not yet been independently verified.

Concrete and steel calculations retain their stated first-generation Eurocode teaching basis. Use the standards and amendments specified for your project; do not mix generations without an appropriate design basis.

Read the lesson register and outstanding review notes

Loads and actions

Hangers deliver deck loads to an arch or main cable and experience repeated tension changes.

Choose a model

Use a coupled deck–hanger–primary-system model. Check whether asymmetric loading unloads a hanger and whether vibration is important.

Design considerations

Compare vertical and inclined layouts; check fatigue, anchorage, adjustability and a designed replacement sequence.

Durability and maintenance

Inspect sockets and water entry; monitor vibration where relevant and establish accessible replacement connections.

Vertical hanger force

A single local free-body diagram. Global load sharing, prestress, asymmetry and construction sequence are omitted.

Local equilibrium for the stated member geometry and loading; no member sizing or stability check.

T = P = 200.0 kN