ASCE Rail Dimensions and Clips

A deep understanding of the various rail profiles is essential for designing, building, and maintaining safe and efficient railway networks. Among the most foundational standards in North America are those set by the American Society of Civil Engineers (ASCE). A thorough knowledge of ASCE rail dimensions is critical for any project involving light to medium-duty track, including industrial spurs, mining lines, and temporary hauling tracks. These specifications define the geometry and weight of each rail section, ensuring interoperability and performance. This technical guide offers a detailed overview of the various ASCE rail profiles and the compatible rail clips used to secure them.

ASCE Rail Dimensions

The ASCE defined a series of T-rail (tee-rail) profiles with a flat bottom, where the weight in pounds per yard designates each section. For example, an ASCE 60 rail weighs 60 pounds per yard. A key characteristic of the original ASCE standard is that the rail’s height and base width are typically equal. The profile distributes its weight in a fixed proportion: 42% in the head, 21% in the web, and 37% in the foot or base. This balanced design ensures stability and strength appropriate for its intended applications. While many heavier mainline applications have transitioned to AREMA profiles, ASCE rails remain vital for light-rail, industrial, and specialized tracks.

ASCE Rail Dimensions Specification Table

The following tables provide the precise dimensions for the full range of ASCE rail sections, from the lightest 8 lb profile to the heavier 100 lb section. These measurements are crucial for engineering calculations, selecting appropriate joint bars (fishplates), and choosing the correct fastening systems.

ASCE Rail Dimensions (Imperial)

ASCE Rail Dimensions (Metric)

The lighter sections, such as ASCE 12 through ASCE 40, are primarily used for mining tracks, amusement park rides, and very light industrial applications where axle loads are minimal. The mid-range sections, like ASCE 60 and ASCE 85, are workhorses in industrial plant railways, yards, and moderate-traffic short lines. They provide a significant step up in strength and durability, capable of handling standard freight cars at lower speeds. The heavier sections, while less common today than their AREMA counterparts, laid the groundwork for modern heavy-haul profiles.

Rail Clips for ASCE Rail Profiles

Securing ASCE rails requires a fastening system that can firmly clamp the rail base to the tie or girder, preventing movement and maintaining track integrity. For ASCE profiles, the most common type of fastener is the bolted rail clip. These clips offer a simple, strong, and reliable method of securing the rail, which is well-suited for the typical applications of ASCE track.

Bolted and Friction-Fit Clips

Bolted rail clips are single-piece steel components designed to fit snugly against the top of the rail base. They are fastened with bolts that pass through the clip and into the sleeper, tie plate, or steel support structure below. This creates a rigid connection that provides excellent resistance to both longitudinal and lateral forces.

Several numbered clip designs are made to fit the varying foot dimensions across the ASCE range.

Rail Clip 114:
This clip is designed specifically for the lighter end of the ASCE spectrum. It is a compact, forged steel clip used to secure rails from 8 lb up to 40 lb. Its smaller profile matches the smaller base dimensions of these light rails, providing a secure fit without interference. The standard hole accommodates a 5/8″ bolt, and the clip itself can be welded to a steel base if needed.

• Compatibility: ASCE 8, 12, 16, 20, 25, 30, 40 lb rails
• Material: Forged Steel
• Installation: Bolted (5/8″ bolt) or weldable

Rail Clip 103:
This is one of the most versatile and widely used clips for medium-weight ASCE rails. The #103 clip is designed to fit a broad range of profiles, from 55 lb up to 100 lb ASCE rail. Its robust design provides substantial clamping force suitable for the higher loads seen on industrial tracks and sidings using ASCE 60, 75, or 85 lb rail.

• Compatibility: ASCE 55, 60, 65, 70, 75, 80, 85, 100 lb rails
• Material: Forged Steel
• Installation: Bolted or weldable, typically with a 3/4″ or 7/8″ bolt depending on the rail size.
• Weight: Approximately 0.65 – 0.75 lbs per clip.

Rail Clip 106 and 62:
These clips are designed for the heavier end of the ASCE spectrum and some ARA profiles. The #106 clip is often used for ASCE 60 lb to 85 lb rail, while the #62 clip is specified for 90 lb and 100 lb sections. They are larger and heavier than the 103 and 114 clips, providing the increased clamping force needed for these more substantial rails.

• Compatibility (#106): ASCE 60, 75, 85 lb rails
• Compatibility (#62): ASCE 90, 100 lb rails
• Material: Forged Steel
• Installation: Bolted with appropriately sized high-strength track bolts.

The choice of clip is directly tied to the specific ASCE rail dimensions, particularly the height and angle of the rail base. Using the correct clip ensures full contact and proper clamping, which is fundamental to the long-term stability and safety of the track.