Rail Sizes Chart & Specifications Guide

Understanding the various standards and dimensions of railroad tracks is essential for any project involving railway construction, maintenance, or supply. A detailed rail sizes chart provides the necessary data to identify and select the appropriate rail for a specific application. This guide offers in-depth specifications for common rail profiles, including ASCE, ARA, and AREMA standards, to assist engineers, project managers, and procurement specialists.

Rail Sizes Chart

There have been many manufacturers and specifications for Tee Rail over the years. The data presented here helps in identifying different rail sections. The dimensions in a rail sizes chart correspond to specific parts of the rail’s cross-section: its height, the width of its base and head, and the thickness of the web. The nominal weight, measured in pounds per yard, is the primary identifier for a rail profile. For instance, a 115 lb rail weighs 115 pounds for every yard of length. This weight directly correlates with the rail’s strength and capacity to handle load and traffic volume.

ASCE Rail Specifications

The American Society of Civil Engineers (ASCE) established some of the earliest standards for rail manufacturing in North America. These profiles are typically used for light-to-medium duty applications, including industrial tracks, crane ways, and light-traffic short lines. Below is a detailed rail sizes chart for ASCE sections.

Advanced Rail Specifications for Heavy-Duty Use

For mainline tracks that endure high speeds and heavy axle loads, more robust rail profiles are required. The American Railway Engineering and Maintenance-of-Way Association (AREMA) provides the modern standards for heavy-duty rail in North America, superseding many of the older ARA (American Railway Association) profiles. These rails feature a thicker head and web and a wider base for greater stability and wear resistance.

AREMA and ARA Rail Specifications

The AREMA standards are the go-to for Class I railroads and heavy-haul freight lines. These profiles are designed for maximum durability and safety under demanding conditions. The following table provides key dimensions for common heavy rail sections, which are crucial components of any comprehensive rail sizes chart.

Rail Clips in Track Stability

Rail clips are fundamental components of the track fastening system, responsible for securing the rail to the tie plate and sleeper. They prevent longitudinal, lateral, and vertical movement of the rail, ensuring proper track gauge and overall stability. Without effective clips, rails could shift under the immense forces exerted by passing trains, leading to potential derailments. The design of a rail clip must provide a strong clamping force while also allowing for minor adjustments and easy installation.

Clips are designed to be compatible with specific rail profiles and tie plates. Their selection depends on the rail’s base width and the type of fastening system being used. They come in various forms, including bolted clips and weldable clips, each suited for different installation requirements.

Rail Clips Specifications and Applications

Rail clips are engineered to match the specific dimensions and load requirements of the rails they secure. A clip designed for a 90 lb ASCE rail will not be suitable for a 136 lb AREMA rail due to differences in base flange thickness and width.

One-Piece Bolted/Weldable Clips:
These versatile clips are widely used for securing tee and crane rails. A common example is the Rail Clip 103, designed for 55 lb to 100 lb ASCE rails.

• Applicable Rails: 55, 60, 65, 70, 75, 80, 85, 90, and 100 lb Tee and crane rails.
• Hole Specification: Typically features an oval hole (e.g., 1-1/16″ x 25/32″) to accommodate hook bolts.
• Installation: Can be either bolted down to the tie plate or welded directly to a steel base. This dual-purpose design offers flexibility during construction and maintenance.
• Material: Manufactured from forged steel to provide high tensile strength and durability.

Elastic Fastening Systems:
Modern mainline tracks often use elastic clips, such as the Pandrol clip or Vossloh clip. These systems offer several advantages:

• Dynamic Response: Elastic clips maintain a constant clamping force on the rail, even as the track structure flexes under load. This elasticity helps absorb vibrations and reduce wear on both the rail and the sleepers.
• Maintenance-Free: Once installed, these systems require minimal maintenance, reducing long-term operational costs. They eliminate the need for periodic re-tightening that is common with rigid bolt systems.
• Compatibility: These systems are designed for heavy-duty AREMA rails and are a standard for high-speed and heavy-haul networks.

The choice of a rail clip is as important as the selection of the rail itself. A proper match ensures the integrity and safety of the entire track structure. Consulting the specifications from the clip manufacturer is essential to ensure compatibility with the selected rail from the rail sizes chart.

What is the function of a rail clip?

A rail clip is a key part of a track’s fastening system. Its primary function is to secure the rail to the tie plate or sleeper, preventing the rail from moving horizontally or vertically. This ensures the track maintains its gauge and stability under train loads.

What are the different types of rail clips?

Rail clips come in two main categories: rigid and elastic. Rigid clips, often bolted, provide a fixed hold and are common on industrial tracks. Elastic clips, like Pandrol or Vossloh clips, allow for slight flex while maintaining constant pressure, making them ideal for high-speed mainline tracks.

FAQs

What does “lb” mean for rails?
The “lb” designation for rails refers to the nominal weight in pounds per yard. For example, a 115 lb rail weighs 115 pounds for every three-foot section. This measurement is a key indicator of the rail’s strength and suitability for different traffic loads.

What are standard rail sizes?
Standard rail sizes vary by application and region. In North America, common sizes for mainline tracks include 115 lb, 132 lb, 136 lb, and 141 lb AREMA sections. Lighter rails, such as 85 lb ASCE, are used for industrial tracks and yards.

How do you identify a rail section?
You can identify a rail section by measuring its key dimensions—height, base width, and head width—and comparing them to a rail sizes chart. Additionally, manufacturers often roll section designations, weight, and production year directly onto the rail’s web.

Recommended Products for Different Rail Sizes

Using a rail sizes chart helps you identify the exact dimensions of your track infrastructure. However, knowing your rail size is only the first step. To build a secure and reliable railway, you must match your specific rail profile with the correct fastening system.

When you select a rail clip, the most critical measurement on the chart is the base width. Your rail fastener must sit completely flush against this bottom flange. When the clip matches the base perfectly, it applies a heavy downward clamping force, also known as toe load. This intense pressure pins the rail firmly to the tie plate or sleeper, neutralizing aggressive dynamic vibrations and preventing the track gauge from widening.

To help you secure your track reliably, we have paired our heavy-duty crane rail clips with the most common ASCE, ARA, and AREMA rail profiles from the standard rail sizes chart. Review the table below to find the perfect fastening solution for your exact track dimensions.

Frequently Asked Questions (FAQs)

1. How do I use the rail sizes chart to choose the right rail clip?
   You should look specifically at the “Base Width” column on the chart. A rail clip only works if it hugs the rail foot perfectly. If your rail features a 5.5-inch base width, you must select a fastener engineered specifically for that dimension, such as the 32 Series Bolted Clip.
2. Why do heavy 136 lb AREA rails require the 9 Series Welded Clips?
   Railways use robust 136 lb rails for high-speed routes and heavy-haul freight lines. These massive trains generate extreme lateral forces that try to push the rails apart. The 9 Series clips weld directly to your steel tie plates, creating a permanent structural anchor. This rigid bond grips the wide 6-inch rail base tightly, completely neutralizing high-speed vibrations.
3. Are the 32 Series Bolted Clips compatible with 100 lb ARA-A tracks?
   Yes. Track crews frequently deploy 100 lb ARA-A rails for industrial spurs and mainline tracks. This rail has a precise base width of 5.5 inches. The 32 Series Bolted Clips match this footprint flawlessly. They deliver heavy downward pressure to lock the rail securely while giving maintenance teams the flexibility to easily loosen the bolts during track alignment.
4. What happens if I install a rail clip that does not match the dimensions on my chart?
   Using a mismatched rail clip creates an immediate safety hazard. If you place a clip designed for a narrower base onto a wide 6-inch heavy rail, the fastener housing will not seat properly. You will instantly lose the essential clamping force. The massive weight of passing trains will quickly shake the unsecured rails loose, increasing the risk of a derailment.
5. How do elastic fastening systems handle the dynamic forces shown in heavy-duty rail specifications?
   Heavy-duty rails support massive axle loads that cause the steel to bend and vibrate aggressively. Our elastic fastening systems, including the 9 Series and 32 Series, utilize premium spring steel components. These clips flex to absorb intense shocks and instantly spring back to their original shape. This continuous action maintains a relentless downward pressure on the rail base, keeping your track securely in gauge.