What is Fish Plate Splice Joint? Explain in details step by step procedure to make a Fish Plate Splice Joint with example and application.

A fish plate splice joint, also known as a rail joint or rail splice, is a method of joining two rail sections end-to-end to create a continuous rail line. It involves the use of a metal plate, typically shaped like a fish, that is bolted to the sides of the rail sections to provide strength and alignment. Fish plate splice joints are commonly used in railway tracks and other applications where rails need to be connected. Here is a step-by-step procedure for making a fish plate splice joint:

Step 1: Preparation

• Gather the necessary materials, including the rail sections, fish plates, bolts, nuts, and washers.
• Ensure that the rail ends are properly prepared for the joint. This may involve grinding or machining to remove any burrs or irregularities.
• Clean the rail ends to remove any contaminants such as dirt, rust, or grease.

Step 2: Alignment and Fit-Up

• Position the rail sections in alignment with each other, ensuring that the rail ends are in contact and properly aligned.
• Use temporary clamps or tack welds to hold the rail sections in position during the splicing process.
• Ensure that the rail ends have proper contact and minimal gap between them.

Step 3: Fish Plate Installation

• Place the fish plate on the sides of the rail sections, aligning the holes in the fish plate with the holes in the rail ends.
• Ensure that the fish plate provides sufficient overlap with both rail sections to ensure a strong connection.
• Insert bolts through the holes, placing washers and nuts on the opposite side of the fish plate.

Step 4: Bolt Tightening

• Begin tightening the nuts on the bolts, applying an appropriate torque or tensioning method.
• Alternate between bolts during the tightening process to ensure even pressure distribution.
• Continue tightening the bolts until the proper tension is achieved, as per manufacturer recommendations or relevant specifications.

Step 5: Quality Control

• Inspect the joint visually to ensure the fish plate is properly aligned and tightened.
• Verify the dimensions and overall quality of the joint according to the design specifications.
• Conduct any required testing or inspections as per industry standards and project requirements to ensure the integrity and strength of the joint.

Example and Application: Fish plate splice joints are commonly used in railway tracks, where they are used to join individual rail sections to create a continuous track. They allow for easy installation, maintenance, and repair of rail lines. Fish plate splice joints are also used in tramways, industrial rail lines, and other applications where rail tracks need to be connected.

For example, in a railway track, when a rail section needs to be replaced or repaired, a fish plate splice joint is used to connect the new rail section to the existing track. The fish plates provide strength and alignment, ensuring that the rail sections are securely joined and can withstand the forces and loads imposed on the track.

It is crucial to follow specific guidelines and standards when selecting and installing fish plate splice joints to ensure they meet the requirements of the railway track and adhere to relevant safety regulations and industry best practices.