.tie rod .tie bolt  .tb

Purpose of tie bolt

1. Hold bedplate, frames and entablature firmly together in compression
2. Prevents fretting between these components
3. Transmit the combustion gas load back to bedplate
4. Maintain the alignment of the running gear
5. Guide bush and pinching screws used to prevent excessive vibration
6. Subjected to heavy tensile loads
7. Prevent excessive bending moments in transverse girders