What Does 136RE Rail Mean in Railway Applications?
Apr 14, 2026
What Does 136RE Rail Mean in Railway Applications?
In technical railway applications, 136RE is a standardized designation for one of the most robust rail profiles used in North America and heavy-haul global corridors. It represents a specific set of geometric and metallurgical standards established by the American Railway Engineering and Maintenance-of-Way Association (AREMA).
1. "136" + "RE"
- "136" (The Weight): This represents the nominal weight of the rail per yard. Specifically, 136RE rail weighs 136.2 lbs per yard (67.56 kg/m). This weight class places it in the "heavy-duty" category, designed for massive freight loads rather than light transit or passenger rail.
| Profile | Standard | Dimensions mm | Section S | Mass m | ||||
|---|---|---|---|---|---|---|---|---|
| H | B | C | D | E | cm² | kg/m | ||
| American standard | ||||||||
| 136RE (TR68) | AREMA | 185,70 | 152,40 | 74,60 | 49,20 | 17,50 | 85,90 | 67,50 |
- "RE" (The Standard): This indicates that the rail profile conforms to AREMA standards. The "RE" (formerly standing for "Revised") signifies a profile that has been optimized for modern wheel-rail interfaces and stress distribution.
2. Role in Heavy-Haul Infrastructure
In application, 136RE is the industry benchmark for Class I Railroads (e.g., Union Pacific, BNSF, CSX) and Mining Lines. Its meaning in these contexts is defined by three factors:
• Load Bearing: It is specifically designed to support 30 to 35-ton axle loads.
• Stiffness: Because the rail is "tall" (7 5/16 inches), it offers a high moment of inertia, acting as a rigid beam that spans ties effectively and prevents subgrade failure.
• Service Life: The "RE" profile features a deep head, meaning it can withstand years of heavy wear and multiple grinding cycles before needing replacement.
3. Application as a System Benchmark
When a project specifies 136RE, it dictates the requirements for the entire fastening system:
- Tie Plates: Must have a 6-inch rail seat to accommodate the base.
- Fasteners: Often paired with heavy-duty E-type clips or tension clamps to manage the high vibrations.
- Joint Bars: Requires specific 136RE-profile fishplates for bolted sections, though most 136RE is now installed as Continuous Welded Rail (CWR).
Frequently Asked Questions About 136RE Rail
1. What does 136RE rail mean?
It refers to a rail weighing 136 pounds per yard with a standardized AREMA profile used in heavy-duty railway systems.
2. What are the typical 136RE rail dimensions?
The 136RE rail dimensions include a height of about 185–186 mm, base width around 150 mm, and head width near 74 mm.
3. Where is 136RE rail commonly used?
It is widely used in freight railways, mining transport systems, and mainline railway infrastructure.
4. What materials are used in 136 RE steel rail?
Common grades include R260, R350HT, 900A, and 1100, providing strength and wear resistance.
5. Can 136RE rail be customized?
Yes, rail length and processing such as drilling or cutting can be adjusted based on project requirements.
6. How do I choose the right rail type?
Selection depends on axle load, traffic volume, and track conditions. Technical confirmation is recommended before procurement.
The meaning of 136RE rail goes beyond its weight-it defines a complete engineering standard, including 136RE rail dimensions, profile, and cross section design. These factors determine how the rail performs in real applications.
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