What is the maximum weight that the QU120 crane rail can bear
Oct 14, 2025
The QU120 crane rail is a high-strength heavy-duty rail specifically designed for port cranes, rail-mounted gantry cranes (RMG), rubber-tired gantry cranes (RTG), and heavy industrial transport lines. Its large cross-section, wide rail head, and thick web enable it to withstand extremely high concentrated wheel loads and frequent start-stop impact forces, but the "maximum load capacity" must be determined considering rail material, track structure, and wheel load distribution.
| Classification | SIZE(mm) | theoretical weight | |||||||||
| height | bottom width | head width | waist depth | ||||||||
| Crane rail | QU70 | 120 | 120 | 70 | 28 | 52.8 | |||||
| QU80 | 130 | 130 | 80 | 32 | 63.69 | ||||||
| QU100 | 150 | 150 | 100 | 38 | 88.96 | ||||||
| QU120 | 170 | 170 | 120 | 44 | 118.1 | ||||||
Generally, the QU120 rail is made of U71Mn high-manganese steel or high-quality alloy steel, with the surface heat-treated and quenched, providing excellent fatigue resistance and wear resistance.
| Steel Grade | C(%) | Si | Mn | Cr | V | P | S | Tensile Strength (Rm/MPa) |
| U71Mn | 0.65~0.76 | 0.15~0.58 | 0.70~1.40 | – | – | ≤0.035 | ≤0.030 | ≥880 |
| U75V | 0.71~0.80 | 0.50~0.80 | 0.75~1.05 | – | 0.04~0.12 | ≤0.035 | ≤0.030 | ≥980 |
| U78CrV | 0.72~0.82 | 0.50~0.80 | 0.70~1.05 | 0.30~0.50 | 0.04~0.12 | ≤0.035 | ≤0.030 | ≥1080 |
According to international and industry reference standards, a single QU120 rail under concentrated wheel load can generally withstand a local wheel load of approximately 120 to 150 tons without permanent deformation or cracking. Of course, the actual load-bearing capacity also depends on the track foundation, sleeper type, track gauge stability, and rail connection method.
In ports, industrial plants, and mining transport lines, the QU120 crane rail is commonly used with overhead crane tracks or gantry crane rail systems, safely supporting the weight and dynamic impact loads of lifting equipment under high-intensity operational conditions, ensuring smooth equipment operation.
GNEE RAIL supplies QU120 crane rails that meet international standards, and can also provide QU100, QU80, and other rails from the same series. Additionally, GNEE RAIL offers professional technical guidance, track selection consultation, and full after-sales support to help customers achieve safe, efficient, and durable operation in heavy-duty rail systems.
