Mobile cranes (rubber-tired cranes such as the LTM, LR, and AC series) are among the most widely used lifting equipment in the construction and industrial sectors, thanks to their easy transportability between sites. In this article, we answer the 10 most frequently asked questions about mobile crane ropes.
1. What diameter should a mobile crane rope be?
Rope diameter varies depending on the crane's load capacity and boom length. Cranes with a 25-50 ton capacity generally use 14-18 mm, while cranes rated at 100 tons and above use a 22-32 mm diameter range.
2. What is the difference between the boom rope and the main hoist rope?
The main hoist rope lifts the load directly, while the boom rope (if present) controls the extension and retraction of the telescopic boom. The two can differ in diameter and construction.
3. How often should a mobile crane rope be replaced?
Depending on usage intensity, it is generally replaced every 3-5 years, or whenever wear or wire breakage is detected during periodic inspection under ISO 4309.
4. Why does a mobile crane rope wear out early?
The most common causes are insufficient lubrication, a low sheave-to-rope diameter ratio (D/d), overloading, and frequent angled pulling operations.
5. Is a crawler crane rope the same as a mobile crane rope?
No. Since crawler cranes operate from a fixed position, they generally use thicker, higher-tonnage ropes, while mobile cranes have rope systems optimized more for transportability.
6. What determines mobile crane rope prices?
Diameter, construction (such as 6×36 IWRC), coating (galvanized/stainless), and brand (domestic/imported) directly affect the price. As of 2026, a 20 mm mobile crane rope costs approximately 150-250 TL per meter.
7. How is a mobile crane rope socketed?
Resin socketing or wedge socketing methods are generally used; this operation must always be performed by a certified technician.
8. How can the risk of a mobile crane rope breaking be reduced?
Regular lubrication, using sheaves with a proper D/d ratio, operating below capacity, and periodic inspections significantly reduce the risk of breakage.
9. Should IWRC or FC be preferred?
Since mobile cranes require high crush resistance, steel-core (IWRC) ropes are preferred; fiber-core (FC) ropes are used more in applications requiring lightness and flexibility.
10. Which standard should a mobile crane rope comply with?
Manufacturer-certified ropes compliant with the EN 12385 and ISO 4309 standards should be preferred. Compliance with the technical specifications provided by the crane manufacturer (Liebherr, Terex, etc.) is also essential.