ME09 · Sem 5 · Machine design
Crane jib
Aim: Find the forces in a cantilevered crane jib carrying a hook load.
🧪 Live simulation🧊 Real-time 3D bench⚠ Simulated values, not physical measurements
🔬 Virtual lab
Starting the lab…
📘 Theory
A jib is a cantilever truss pinned to a mast. The top chord carries tension and the bottom chord compression; the forces are largest near the mast.
Moment at mast = P × reach
🧰 Apparatus (virtual)
- Crane jib model
- hook load
📝 Procedure
🎤 Viva questions
Why are jibs deepest at the mast
The bending moment is largest there.
What else limits a crane
Overturning stability and the rope strength.
🛡️ Safety
Virtual by default. Machine shops, CNC, presses and test rigs need instructor supervision, PPE and machine-specific safety training.