What are the dimensions of A55 crane rail?
The A55 crane rail is manufactured according to the DIN 536-1:1991 standard, featuring a specific low-profile "A" shape with a wide base for enhanced stability. The dimensions are engineered to distribute heavy wheel loads effectively across the support structure.
The A55 rail dimensions are specifically optimized for "A" type rails, which prioritize a wide footprint. This wide base (b₂ = 150 mm) allows for lower surface pressure on the baseplates/steel soleplates, making it ideal for installation on concrete or steel beams where load distribution is a primary concern.

| Size | Dimension(mm) | Weight | Material | Length | |||
|---|---|---|---|---|---|---|---|
| Head(mm) | Height(mm) | Bottom(mm) | Web(mm) | ||||
| A 55 | 55 | 65 | 150 | 31 | 31.8 | 900A | 10-12 |
| A65 | 65 | 75 | 175 | 38 | 43.1 | 900A | 10-12 |
| A75 | 75 | 85 | 200 | 45 | 56.2 | 900A | 10-12 |
| A100 | 100 | 95 | 200 | 60 | 74.3 | 900A | 10-12 |
| A120 | 120 | 105 | 220 | 72 | 100 | 900A | 10-12 |
Beyond the external geometry, the A55 rail profile is characterized by its robust head design. With a head width of 55 mm, it provides ample contact surface for the crane's wheels, reducing localized stress and wear.
GNEE RAIL utilizes high-precision rolling mills to ensure every meter of A55 steel rails adheres to the strict tolerances defined by European Standard DIN 536 P1:1991. Our production process includes automated cooling and straightening to maintain the verticality and alignment required for high-speed crane operations.
Why choose A55 Steel Crane Rail?
DIN A55 steel rail is a specialized DIN 536 standard rail often chosen for medium-duty overhead cranes, gantry cranes, and automated storage systems because of its high structural stability, wear resistance, and precise dimensional accuracy. It is widely used in manufacturing, warehousing, and ports to ensure smooth, low-maintenance operations.
1. Robust Structural Design
- Optimal Load Distribution: With a 150mm base and 31mm thick web, the A55 rail provides excellent stability and resists bending under moderate to heavy loads.

- Low Profile: The 65mm height gives the rail a low center of gravity, which enhances stability for crane systems.
- Specific Head Width: A 55mm head width is designed to match with standard crane wheels, reducing friction.
2. High-Quality Material and Durability
- Material Strength: Typically produced from high-strength steel grades such as 50Mn, 900A, or U71Mn, these rails offer high tensile strength (≥ 64
- Wear Resistance: The materials used are engineered to withstand the continuous operational stress and wear experienced in industrial environments.
3. Precision and Compliance (DIN 536)
- International Standards: The A55 rail is compliant with the DIN 536 P1:1991 standard, ensuring consistent quality, geometry, and reliable performance in global applications.

- Reduced Maintenance: High manufacturing precision reduces uneven wear, leading to lower maintenance costs and longer service life for both the rail and crane wheels.
4. Versatile Installation
- Flexible Mounting: A55 rails can be easily secured to steel beams or concrete foundations using specialized rail clips and fastening systems, allowing for easy alignment and adjustment.
FAQ
1. What is the benefit of the "A" type low profile compared to standard rails?
The "A" type design, such as the A55 rail profile, features a much wider base relative to its height. This provides superior lateral stability and prevents the rail from tilting or "rolling" under the high side-forces often generated by overhead cranes.
2. Can A55 rails be supplied with pre-drilled holes?
Yes, for many A55 overhead crane rail systems, we provide customized drilling services based on your specific hole centers and diameters, allowing for faster bolt-down installation on site without the need for field machining.
3. How do I determine if A55 is the right size for my crane?
This is determined by the maximum wheel load of your crane. The Specifications of A55 Rail allow for a specific maximum load per wheel (typically around 100-120 kN depending on the crane's duty group).
4. What is the standard length for DIN 536 A55 crane rail?
Standard lengths are typically 12 meters, but we can provide custom lengths ranging from 6m to 15m to minimize the number of joints in your A55 crane tracks, depending on your shipping and installation requirements.
5. Does GNEE RAIL provide the necessary clips and pads for A55?
Absolutely. We supply a full range of A55 rail accessories, including weldable or bolted clips and continuous or individual rubber pads, ensuring a complete and integrated DIN536 A55 Rail System.
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GNEE RAIL offers professional technical support to help you select the exact specifications and accessories needed for a reliable installation. From providing the DIN A55 Rail Weight for your structural calculations to advising on the best welding techniques, we ensure your project is built on a solid foundation.
Contact us to receive a customized technical proposal and pricing for your A55 Crane Rail needs. Our team provides the expertise required to optimize your track system for maximum safety and performance.

