1. What is Number of Rails per Km Calculator?

Definition: This calculator determines how many rails are needed per kilometer of track based on the total weight of rails per km, length of single rail, and weight per meter of rail.

Purpose: It helps railway engineers and construction professionals plan rail requirements for track construction projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( N \) — Number of rails per kilometer
• \( W \) — Weight of rails per km (tonnes)
• \( L \) — Length of single rail (meters)
• \( w \) — Weight of rail per meter (kg/m)

Explanation: The total weight of rails per km is converted to kg (×1000), then divided by the weight of one rail (length × weight per meter).

3. Importance of Rail Calculation

Details: Accurate rail calculation ensures proper material procurement, cost estimation, and efficient track construction.

4. Using the Calculator

Tips: Enter the weight of rails per km in tonnes, length of single rail (default 13m for broad gauge), weight per meter (default 52kg/m), and tolerance percentage (default ±5%).

5. Frequently Asked Questions (FAQ)

Q1: What's the standard rail length in India?
A: Indian Railways uses 13m for broad gauge and 12m for MG/NG tracks.

Q2: What does the tolerance percentage mean?
A: It accounts for variations in rail weight, cutting waste, and installation factors (±5% is typical).

Q3: How do I find the weight of rails per km?
A: This is typically specified in project documents or can be calculated from rail specifications.

Q4: What's the most common rail weight per meter?
A: 52kg/m is standard for main lines, with lighter rails (45kg/m) used on branch lines.

Q5: Does this account for rail joints and overlaps?
A: The calculation provides the theoretical number; actual count may vary slightly due to joint arrangements.

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