What Is The Base Width Standard For A120 Heavy Profile?
The standard base width (also known as flange width) for the A120 rail profile is precisely 220 mm. This dimension is a core specification of the European Standard DIN 536 P1:1991, distinguishing the A120 as a high-stability rail designed for the most demanding industrial environments. With a base width that is more than double its total height (105 mm), the A120 rails provide a low center of gravity and an expansive footprint, which are essential for maintaining the structural integrity of heavy-duty crane runways.
- Stability Ratio: The 220 mm base width creates an exceptionally stable "A" shape, preventing the rail from tilting or rolling under extreme lateral (side) forces.
- Load Bearing: This wide surface area is designed to support the 101.2 kg/m mass of the A120 heavy rails plus the active vertical loads from 40-ton to 60-ton crane wheels.
- System Integration: The 220 mm width is the primary reference point for selecting compatible A120 rail accessories, ensuring a perfect fit with mounting hardware.
- Standardization: Adherence to the DIN 536 Standard A120 crane rail ensures that the rail will be compatible with globally standardized baseplates/Steel Soleplates and clip systems.
Specifications of A120 Rail:
| Model | Dimension | Weight(kg/m) | Material | Length(m) | |||
| Head Width(mm) | Height(mm) | Bottom Width(mm) | Thickness(mm) | ||||
| A120 | 120 | 105 | 220 | 72 | 100 | 700/900A/1100 | 10-12 |
GNEE RAILWAY RAILWAYL produces A120 steel rails with strict dimensional control to ensure that the 220 mm base width remains consistent throughout the entire rolling process. As a specialized manufacturer, we utilize precision milling to maintain tight tolerances, ensuring that every segment of our A120 steel crane rail provides a flush, even contact surface for the supporting structure.
How Does Base Width Dictate Accessory Selection for A120 Rail?
The 220 mm base width is the most important dimension when sourcing a DIN536 A120 Rail System. It creates a "mechanical linkage" with two essential components: standard fastening clips and rubber pads. If the clips are not designed for a 220 mm flange, they will either fail to reach the rail head or provide insufficient clamping force, leading to a dangerous "floating rail" condition.
When purchasing rubber pads, it is a mandatory requirement that the pad width matches the 220 mm base of the A120 rail material exactly. A pad that is too narrow will cause the rail to tilt, while one that is too wide will interfere with the welding of the baseplates/Steel Soleplates. Furthermore, the A120 rail accessories such as soleplates must be wide enough to accommodate the 220 mm rail base plus the width of the weldable clips on either side, typically requiring a total plate width of at least 350-400 mm.
- Pad Sourcing: Specify "220mm wide reinforced rubber pads" to ensure total base coverage.
- Clip Compatibility: Ensure the clip's "toe" is rated for the 30 mm thickness of the A120 rails flange.
- Soleplate Design: Use the 220 mm base as the starting point for calculating all mounting hole positions.
Frequently Asked Questions
1. Is the base width of A120 rail the same across all steel grades?
Yes. Whether you choose A120 DIN536 Grade S700 European Crane Rail or a Grade 900 variant, the DIN A120 Rail Dimensions remain constant at 220 mm. The grade only affects the strength and hardness of the A120 rail material.
2. What happens if the rubber pad is wider than the 220 mm base?
If the pad is too wide, it may block the installation of the standard fastening clips or protrude into the welding zone of the soleplates. For a clean, safe DIN536 A120 Rail System, the pad should match the base width within a tolerance of ±2mm.
3. Why is the A120 base so much wider than its height?
This is a safety feature of the "A" series. The 220 mm base vs. 105 mm height ensures the A120 rail profile has a very low center of gravity, making it nearly impossible for the rail to "tip over" during the sudden starts and stops of a heavy overhead crane.
4. How does the 220 mm base affect the A120 rail weight per meter?
The wide base is the main reason for the DIN A120 Rail Weight of 101.2 kg/m. The large volume of steel in the base and flange provides the mass necessary for the rail to act as a stable foundation for the crane wheels.
5. Can I use A120 rails on narrow concrete beams?
Because the base is 220 mm wide, the supporting beam must be wide enough to accommodate the rail and the baseplates/Steel Soleplates. Using A120 heavy rails on beams that are too narrow can lead to edge-spalling of the concrete.
6. Does GNEE RAILWAY RAILWAYL provide technical drawings for the A120 rail system?
Yes, we provide full technical specifications of A120 Rail, including detailed cross-sections and accessory mounting layouts, to ensure your A120 overhead crane rail systems are designed correctly from the start.
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At GNEE RAILWAY RAILWAYL, we provide high-precision A120 steel rails and a complete range of matching A120 rail accessories all designed to fit the 220 mm base standard perfectly. Whether you are designing a new port terminal or upgrading a heavy industrial facility, our team of experts can help you verify the Specifications of A120 Rail and provide a cost-effective, integrated package. Contact us to get a professional solution and ensure your A120 crane rail project is built to the highest international standards.
