Can Crane Rail A55 be used for overhead cranes?
Yes, A55 rail is specifically designed for overhead crane systems. In fact, it is one of the most common profiles used for light-to-medium duty gantry and overhead bridge cranes in warehouses, workshops, and assembly lines.
Its suitability for overhead systems is determined by its specific dimensions and how it handles the forces exerted by industrial lifting equipment.
Why A55 is Used for Overhead Cranes?
The A55 profile belongs to the DIN 536-1 standard. Its physical characteristics make it ideal for the top of a runway beam:
- Load Distribution: The wide base (150 mm) provides a large contact area with the supporting steel beam. This ensures that the weight of the crane and its load is distributed evenly, preventing local deformation of the runway structure.
- Stability: Because the A55 is relatively short (65 mm in height), it has a low center of gravity. This makes it highly resistant to the lateral (side-to-side) forces generated when a crane starts, stops, or carries a swinging load.
- Thick Web: The 31 mm thick web is significantly beefier than standard railway tracks. This thickness is necessary to withstand the high point-loads from the crane wheels without the rail "crushing" or bending over time.
| 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 |
Limitations and Considerations
While A55 is excellent for overhead cranes, its use depends on the wheel load of your specific crane:
- Wheel Profile: The width of the A55 head is 55 mm. You must ensure the crane wheel tread is slightly narrower than the rail head (or properly flanged) to prevent excessive wear on the edges.
- Capacity: If you are operating a heavy-duty crane (e.g., in a steel mill or large port), you may need to scale up to a larger profile, such as an A100 or A120, to handle the higher tonnage.
- Pad Usage: In many overhead installations, a reinforced rubber pad is placed between the A55 rail and the steel beam. This reduces wear on the support structure and helps distribute the load more effectively.
Material Choice and Service Life
The "right" rail is also defined by how long it lasts. For standard indoor workshops, the A55 rail material in S700 grade is usually sufficient. However, if your overhead crane operates in a 24/7 high-intensity environment like a steel mill or a busy warehouse, we recommend the S900 A55 Crane Rail Material Grade. This higher grade offers superior hardness (900 N/mm²), which prevents the rail head from "mushrooming" or pitting under repetitive stress.
| Property | S700 (High-Strength) | S900 (Ultra-High-Strength) |
| Minimum Yield Strength | ≈ 700 MPa | ≈ 900 MPa |
| Tensile Strength | 750 – 950 MPa | 940 – 1100 MPa |
| Minimum Elongation | ~10% to 12% | ~8% to 10% |
| Standard Compliance | EN 10149-2 / EN 10025-6 | EN 10025-6 |
| Formability | Excellent cold-forming properties. | Limited; requires larger bending radii. |
| Weldability | High; low carbon equivalent. | Requires precise heat control to avoid cracking. |
The A55 Crane Rail Material Composition-rich in Manganese and Silicon-ensures that the rail remains durable even in abrasive environments. To further maximize the life of your A55 heavy rails, it is essential to use Alumothermic Welding kits for Rails. By creating a continuous, jointless track, you eliminate the mechanical impact at the joints, which is the primary cause of damage to both the A55 Steel Crane Rail and the crane's bearings and electronics.
FAQ
1. What is the maximum wheel load for an A55 overhead crane rail?
The A55 rail profile is generally rated for wheel loads up to 125 kN (approx. 12.5 tons per wheel). If your crane exceeds this load, you should consider the A65 or A75 profiles to prevent rail head deformation.
2. Can A55 rail be used for outdoor gantry cranes?
Yes, but you must account for corrosion. We recommend using galvanized A55 rail accessories and potentially a higher A55 Crane Rail Material Grade (S900Q) to resist environmental wear and surface oxidation in outdoor settings.
3. Why use A55 instead of a standard T-rail for an overhead crane?
The A55 rail dimensions provide a 150mm wide base, which is much more stable than a narrow T-rail. This wide base prevents the rail from twisting under lateral forces, which is the most common cause of overhead crane track failure.
4. How do I know if my existing crane wheels will fit the A55 head?
The A55 rail dimensions details specify a 55mm head width with a 5mm radius at the corners. You must ensure your crane wheel's tread width is at least 5-10mm wider than the rail head to allow for proper tracking and lateral float.
5. How much does a 12-meter section of A55 rail weigh?
The A55 rail weight per meter is 31.8 kg/m, so a 12-meter section weighs 381.6 kg. This is an essential figure for your installation team when planning the lifting and positioning of the rails.
6. Do you provide the welding kits for A55 rail?
Yes, we supply specialized Alumothermic Welding kits for Rails specifically designed for the DIN 536 a55 crane rails profile. This ensures a seamless "road" that eliminates vibration and extends the life of your crane components.
Request Latest Price
Choosing the wrong rail profile can lead to expensive downtime and structural repairs. Our technical engineers are ready to review your wheel load, duty cycle, and installation environment to confirm if the A55 is truly the right profile for your overhead crane. GNEE RAIL provide end-to-end solutions, from the A55 Steel Crane Rail itself to the high-quality clips and pads needed for a professional finish.
Contact Us to receive a detailed technical data sheet and a competitive quote for your A55 Crane Rail needs.