Custom L-Type Offset Gantry Crane for Long Loads with High Clearance
Non-Standard L-Type Offset Hoist Gantry Crane: Structural Optimization and Outrigger Load Calculation for Long Loads with High Clearance. This crane features an asymmetrically curved L-shaped outrigger design, creating a wide transverse clearance between the legs. It is specifically engineered to handle long materials—such as steel pipes, billets, plates, bridge segments, and prestressed concrete piles—that cannot pass through the leg area of a standard general-purpose gantry crane.
The L-type offset hoist gantry crane utilizes an asymmetrically curved L-shaped outrigger design, providing a large transverse clearance between the legs. This configuration directly addresses the limitation of general-purpose gantry cranes, where long materials like steel pipes, billets, plates, bridge segments, and prestressed concrete piles cannot pass through the leg structure. In steel markets, pipe yards, bridge precast facilities, and timber processing plants, this crane type offers the most efficient material handling solution, enabling single-step positioning and eliminating the need for secondary transfers.
However, the structural behavior of L-shaped outriggers is significantly more complex than standard straight legs. The asymmetric offset load induces additional torque on the main girder, causes pronounced stress concentrations at the outrigger base, leads to uneven wheel load distribution on the crane runway rails, and makes cantilever deflection difficult to control. These factors necessitate precise structural calculation and cross-section optimization during the design phase. Kelude Heavy Industry has systematically outlined the complete design workflow—from mechanical modeling to structural optimization—for L-type offset hoist gantry cranes, referencing standards such as ISO 4301—2008 Crane Design Standard, JB/T 5898-2015—2014 Rules for Type Test of Gantry Cranes, GB/T 14406-2011 General Purpose Gantry Cranes, JB/T 5663-2008 Electric Hoist Gantry Cranes, and ISO 8686 Cranes - design principles for loads and load combinations.
Structural Characteristics of L-Type Offset Hoist Gantry Cranes
The fundamental difference between the L-type offset hoist gantry crane and the standard MH-type straight-leg gantry crane lies in the outrigger configuration. The standard MH type uses lattice or box-type straight legs, symmetrically arranged, with the electric hoist operating directly beneath the centerline of the main girder. This setup subjects the main girder only to vertical bending moments, with no torsional forces. In contrast, the L-type offset hoist gantry crane features curved L-shaped (or folded) outriggers, typically bent at an angle between 120° and 150°. This design creates a wide transverse clearance between the legs. The electric hoist is offset on a rail along one side of the main girder, allowing long materials to pass freely between the legs and be rotated horizontally by more than 90°.
Typical technical parameters for the L-type offset hoist gantry crane include: rated lifting capacity from 1 to 32 tons, span from 10 to 35 meters, cantilever length from 3 to 6 meters (available on one or both sides), and lifting height from 6 to 18 meters. The outrigger bend angle is generally set between 120° and 150° (135° is common), and the transverse clearance width is determined by the maximum material length, usually ranging from 30% to 50% of the span. Long travel speed is 20 to 30 m/min, cross travel speed is 20 m/min, and lifting speed is 8 m/min for main hoisting and 0.8 m/min for slow positioning. The crane work duty is A4 to A6, and the mechanism duty is M4 to M5. The design life is 25 years, with fatigue verification based on a cumulative 100,000 duty cycles.
Mathematical Model for Outrigger Load Calculation
The stress analysis of the L-shaped outrigger is the theoretical core of the entire crane design. Compared to straight legs, L-shaped outriggers present three key mechanical differences: (1) The offset hoist creates an eccentric load on the main girder, inducing an additional torque T = P × e about the longitudinal axis of the girder, where P is the hoist's rated lifting capacity plus its dead weight, and e is the offset distance (typically 300 to 600 mm). (2) The curved outrigger exhibits a significant bending moment discontinuity at its base; the combined moment at the bend section is 30% to 50% higher than that of a straight-leg structure of the same tonnage. (3) The offset load causes uneven wheel loads on the two crane runway rails; the wheel load on the offset side (Pmax) can reach 1.5 to 2.5 times that on the opposite side (Pmin), requiring the rail foundation to be designed for the most adverse condition.
Load Classification and Combinations. According to ISO 4301—2008, design loads are categorized into Class I (normal service loads), Class II (maximum working loads), and Class III (special loads, including wind, test, and seismic loads). For the L-type offset hoist gantry crane, the following six load cases must be considered: ① Hoist at mid-span with full load (maximum vertical bending moment); ② Hoist at the offset-side cantilever tip with full load (maximum torque plus maximum cantilever bending moment); ③ Hoist at the span end with full load (maximum outrigger base bending moment); ④ Hoist with full load plus maximum working wind load (maximum combined stress); ⑤ No load plus maximum non-working wind load (anti-overturning stability); ⑥ Static load test at 1.25 times the rated capacity.
Simplified Outrigger Mechanical Model. The L-shaped outrigger is modeled as a spatial rigid frame. The connection between the main girder and the outrigger is treated as a rigid joint, while the connection between the outrigger and the ground beam is considered pinned. Each outrigger unit is discretized into 6-degree-of-freedom beam elements (3 translational and 3 rotational). A local reinforcement section is applied at the bend, with the cross-sectional moment of inertia calculated based on the actual welded box-section dimensions. For a typical 16t/26m configuration, the combined stress at the outrigger base under load case ③ is approximately 180 to 220 MPa. The safety factor, n = σs/σmax, is calculated as 235/220 ≈ 1.07 for Q235B (≈S235JR) or 345/220 ≈ 1.57 for Q355B (≈S355JR). As ISO 4301 requires a minimum structural safety factor of 1.48, Q355B is recommended as the primary material for the outriggers.
Finite Element Analysis and Structural Optimization
Due to the significant geometric non-linearity and load asymmetry of the L-shaped outrigger, the accuracy of analytical hand calculations is limited. Therefore, the Finite Element Method (FEM) is essential for overall structural analysis. The recommended analysis approach is as follows:
Cantilever End Deflection Calculation
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Cantilever end deflection is a key performance indicator for L-type offset-head gantry cranes. Excessive cantilever deflection not only compromises positioning accuracy but also accelerates trolley rail wear and increases overall crane vibration. Per ISO 4301 Crane Design Standard, the vertical deflection at the cantilever end fv must not exceed Lc/350 (where Lc is the cantilever length), with an absolute limit of 20mm.
Calculation example: For a 16t/26m L-type offset-head gantry crane with a cantilever length Lc = 5m, box-section main girder (top flange 500×14mm, bottom flange 500×16mm, web plate 700×10mm), material Q355B (elastic modulus E = 206GPa), and offset distance e = 400mm, with the hoist fully loaded at the cantilever end:
① Vertical deflection: fv = (P·Lc³)/(3EI) = (160×10³×5000³)/(3×206×10³×4.27×10⁹) ≈ 15.2mm, which exceeds the allowable Lc/350 = 5000/350 ≈ 14.3mm. The cantilever section requires reinforcement.
② Reinforcement: Increase the cantilever web plate thickness from 10mm to 14mm and widen the top flange from 500mm to 560mm. The recalculated moment of inertia Ixx = 5.86×10⁹mm⁴ gives fv = 11.1mm, satisfying the ≤14.3mm requirement.
③ Lateral deflection at the cantilever end (due to torsion): fh = (T·Lc²)/(2GIt) × er, where torque T = P×e = 160×0.4 = 64kN·m, shear modulus G = 79GPa, torsional moment of inertia It ≈ 2.1×10⁹mm⁴, and eccentricity er (distance from shear center to load point) ≈ 200mm. This yields fh ≈ 3.8mm, exceeding the Lc/2000 = 2.5mm limit. By reducing diaphragm plate spacing to 2m, It increases to 2.5×10⁹mm⁴, bringing fh down to 3.2mm. With the addition of torsional bracing on the offset-load side, the final fh = 2.1mm, meeting the requirement.
Main Girder Torsional Design and Control Measures
The offset suspension configuration subjects the main girder to continuous torsional loading—the most significant design divergence between an L-type offset-suspension gantry crane and a standard gantry crane. The main girder cross-section must adopt a closed box structure (open sections such as I-beams offer torsional stiffness of only 1/10 to 1/20 that of a box section, making them entirely unsuitable for offset suspension). The box section height-to-width ratio H/B should be 1.5–2.0, with web plate thickness determined by combined shear stress and torsional restraint conditions (typically 1/150 to 1/200 of the span).
Torsional Angle Control: The torsional angle per unit length, θ = T/(GIt), should be kept within 1°/m. For a typical 16t/26m configuration, T = 64 kN·m, and the closed box section's It = 4A₀²t/S ≈ 2.1×10⁹ mm⁴, yielding θ ≈ 0.37°/m, which meets the requirement. When θ exceeds the limit, the preferred corrective measures are: ① increasing the box section's overall dimensions (increasing A₀); ② increasing wall thickness (t); ③ installing internal cross-shaped anti-torsion diaphragms.
Diaphragm Plate Design: Diaphragm plates are installed along the main girder span at 2–3 m intervals, with plate thickness set at 0.8–1.0 times the web plate thickness. These diaphragms serve dual purposes: preventing cross-section distortion (warping) and transmitting shear flow. In the outrigger-to-main-girder connection zones, diaphragm spacing is tightened to 1.0–1.5 m to form a torsion-reinforced segment. Additionally, longitudinal stiffening ribs (100×12 mm) added to the lower flange on the offset side of the main girder can reduce torsional warping stress by 30%–40%.
Fatigue Life Verification: Fatigue stress spectrum analysis is performed in accordance with ISO 4301 Annex K. For L-type offset-suspension gantry cranes, the equivalent fatigue stress Δσeq = Ks·Δσmax, where Ks is the stress spectrum coefficient (taken as 0.5–0.7) and Δσmax is the maximum stress amplitude within the duty cycle. Using the gantry crane fatigue test conditions specified in JB/T 5898, the equivalent number of cycles Neq = 2×10⁶, and the fatigue design life should be no less than 25 years. For welded joints with fatigue detail category FAT80 or higher, it is recommended to grind down weld reinforcement and perform 100% UT detection.
Comparison of Outrigger Configurations: Pros and Cons
In custom gantry crane design, the choice of outrigger configuration directly impacts overall machine performance and cost-effectiveness. Below is a systematic comparison of three common configurations across eight key dimensions:
| Comparison Item | StandardMHStraight Leg | LOffset-Suspended TypeOutrigger | COffset-Suspended TypeOutrigger |
|---|---|---|---|
| Structural Configuration | Upright Symmetric Box Section/Lattice FrameOutrigger | BendingLUpright Symmetric Box SectionOutrigger,Bend Angle120°~150° | BendingCUpright Symmetric Box SectionOutrigger,Bend Angle90°~120° |
| Advantages | Simple Structure,Lowest Cost,Symmetric Loading, NoTorque | Largeclearance(Span40%~60%),Compact Structure,Large Single-Side Working Range | clearanceMaximum,Omnidirectional Material HandlingRotation,Flexible Loading/Unloading |
| Disadvantages | OutriggerSpanclearanceSmall,Long Materials Cannot Pass Through | Eccentric Loading PresentTorque,OutriggerRoot Stress Concentration,Wheel loadUneven | Most Complex Structure,High Manufacturing Difficulty,Cost ApproximatelyL Type1.3~1.5Times |
| Loading Characteristics | Pure Vertical Bending Moment,Symmetric Loading, NoTorqueSymmetric Distribution | Main GirderSubject toTorqueT=P×e,OutriggerLarge Root Bending Moment30%~50% | TorqueMaximum,Complex Spatial Loading,OutriggerSignificant Torsional Stress Concentration |
| Applicable Material Length | ≤6m | 12~24m | ＞24m |
| Maximumclearance/SpanRatio | ＜30% | 40%~60% | ＞60% |
| CostCoefficient | 1.0(Baseline) | 1.15~1.25 | 1.3~1.5 |
| Typical Application Scenarios | General PurposeFactory building,Short Material Processing,Warehouse Logistics | Long Material Market(Pipe Piles/Profiles/Steel Pipes),Bridge Precast Yard,SteelLong Material Market | Oversized Materials(Ship Blocks/Wind Turbine Blades/Heavy Equipment),Space-Constrained Sites |
From an engineering economics standpoint: when the required lateral clearance is 30%–50% of the span, the L-type offset configuration offers the best cost-performance ratio. For clearances exceeding 50%, a C-type configuration should be considered. For clearances below 30% with no eccentric load requirements, a standard MH-type straight-leg design is the right choice. Kelude can provide a comparative analysis of all three options based on material length, site conditions, and budget, ensuring both structural safety and investment efficiency.
Wheel Block and Crane Rail Foundation Design
Eccentric loading causes severely uneven wheel load distribution across the crane bridge wheels of an L-type offset gantry crane. Per Section 5.4 of ISO 4301 Crane Design Standard, the maximum wheel load Pmax and minimum wheel load Pmin for each wheel block must be calculated under the most unfavorable operating condition. The allowable contact stress σH on the wheel tread of the eccentric-load side must not exceed 600 MPa (wheel material: 65Mn or 42CrMo, tread hardness HB320–380).
Wheel Selection: The eccentric-load side typically uses larger-diameter wheels (diameter increased by 50–100 mm; common specifications: φ600–φ700 mm on the eccentric side, φ500–φ600 mm on the opposite side) or a dual-wheel-block arrangement to distribute wheel loads. Recommended wheel material is 42CrMo forged steel with medium-frequency induction hardening on the tread surface — hardened layer depth ≥ 4 mm, surface hardness HRC50–55, and core hardness HB280–320. The number of wheels on the eccentric side can be determined by dividing Pmax by (πd²[σH]/4), ensuring the actual contact stress on each wheel stays within the allowable limit.
Rail Foundation Design: The design bearing capacity of the rail foundation must be based on 1.5 times the maximum wheel load. The characteristic bearing capacity fak of the foundation soil on the eccentric-load side must be 30%–50% higher than that on the opposite side — for example, fak ≥ 180 kPa on the eccentric side versus fak ≥ 120 kPa on the other side. The runway beam is recommended to be cast-in-place C30 reinforced concrete, with cross-section dimensions determined by wheel load and foundation beam span (typical values: 500–800 mm wide × 400–600 mm high). Main reinforcement uses HRB400-grade rebar with a reinforcement ratio of 0.6%–1.2%. The crane rail is P38 or P43 profile, with rail fixing clips spaced at ≤ 500 mm and M20×300 mm hot-dip galvanized anchor bolts. Expansion joints (5–10 mm) are provided at rail joints, with copper conductors welded across the joints to meet grounding requirements.
Wheel Flange Wear Countermeasures: Due to uneven wheel loads and rail installation tolerances, L-type offset gantry cranes are more prone to wheel flange wear (rail gnawing) than conventional gantry cranes. In Kelude's engineering practice, the following integrated measures are applied: ① Rail installation straightness ≤ 2 mm/2 m, with span deviation ≤ ±3 mm; ② Crane bridge wheels use horizontal flange guiding (clearance between horizontal guide roller and rail side: 2–3 mm); ③ An equalizing beam (floating beam) is built into the drive mechanism on the eccentric-load side, keeping wheel load variation within the same wheel group at ≤ 15%; ④ The electrical system uses variable frequency speed control (VFD), with acceleration/deceleration limited to 0.1–0.2 m/s² to reduce flange rubbing forces caused by inertia.
Frequently Asked Questions
Q: What are the main differences between an L-type offset gantry crane and a conventional gantry crane?
A: Based on Kelude's experience in custom L-type offset gantry crane design, the core differences lie in the outrigger configuration and load-bearing characteristics. A conventional gantry crane uses symmetrical straight outriggers (MH type), with the electric hoist positioned directly below the centerline of the main girder. The main girder is subjected only to vertical bending moments, resulting in symmetric and uniform structural loading. An L-type offset gantry crane, by contrast, uses curved L-shaped outriggers (bend angle 120°–150°), with the electric hoist offset to one side of the main girder on a dedicated rail. This creates a large lateral clearance between the outriggers (up to 30%–50% of the span), allowing long materials to pass through and rotate more than 90°. However, the offset configuration subjects the main girder to an additional torque T = P × e (P = load, e = offset distance of 300–600 mm), significantly increases stress concentration at the outrigger base (30%–50% higher than a straight-leg design of equal capacity), and causes uneven wheel load distribution (the eccentric side can carry 1.5–2.5 times the load of the opposite side). The design calculations are far more complex than those for conventional gantry cranes.
Q: What key load cases must be considered in the structural calculation of L-type outriggers?
A: Per ISO 4301 Crane Design Standard, the outrigger structural calculation for an L-type offset gantry crane must cover the following six load cases: ① Hoist at full load at mid-span — for maximum vertical bending moment in the main girder; ② Hoist at full load at the offset-side cantilever end — for maximum combined torque plus maximum cantilever bending moment (most unfavorable combination); ③ Hoist at full load at the span end — for maximum bending moment at the outrigger base (outrigger strength control case); ④ Hoist at full load plus maximum in-service wind load — for maximum combined stress; ⑤ No load plus maximum out-of-service wind load — for anti-overturning stability verification; ⑥ 1.25× static load test condition — for ultimate load capacity verification. Cases ② and ③ are the design control cases. For Q355B steel (≈S355JR), the maximum combined stress at the outrigger base must be kept within 207 MPa (safety factor n ≥ 1.48).
Q: How is cantilever end deflection calculated, and what is the allowable range?
A: Cantilever end deflection is divided into vertical deflection and lateral deflection (caused by torsion). Vertical deflection is calculated as fv = P·Lc³/(3EI) (P = load at the cantilever end, Lc = cantilever length, E = elastic modulus of 206 GPa, I = moment of inertia of the cross-section). Per ISO 4301, fv ≤ Lc/350 and ≤ 20 mm. Lateral deflection is caused by the eccentric torque T = P × e and is calculated as fh = T·Lc²/(2GIt) × er (G = shear modulus of 79 GPa, It = torsional moment of inertia, er = eccentricity). It is recommended to keep fh ≤ Lc/2000. If deflection exceeds the allowable limits, optimization can be achieved by increasing the main girder section height, thickening the web plates (e.g., from 10 mm to 14 mm), adding stiffeners, or reducing the cantilever length. Kelude can provide tailored deflection control solutions.
Q: What are the key technical considerations for custom L-type offset gantry crane design?
A: Custom L-type offset gantry crane design requires mastery of the following core technical points: ① Systematic design capability based on the full set of applicable standards — ISO 4301, JB/T 5898-2015, and GB/T 14406 — covering the entire workflow from mechanical modeling to fatigue verification; ② A finite element analysis platform for overall structural analysis (hybrid shell + solid element modeling, with 50,000–150,000 elements) that accurately simulates stress distribution and deformation under all six load cases; ③ Proprietary stress concentration control technology at the outrigger base — crescent-shaped internal stiffeners reduce the stress concentration factor from 2.0 to below 1.3, and optimized box-section web plates reduce base stress by 15%–20%; ④ A 7-step cantilever deflection verification system (including vertical, lateral, and torsional coupling calculations) supported by four cross-section reinforcement schemes; ⑤ Equalizing beam technology on the eccentric-load side that keeps wheel load variation within the same wheel group at ≤ 15%, significantly extending wheel and rail service life. Kelude has delivered 50+ custom solutions for steel markets, pipe pile plants, and bridge precasting yards.
Kelude QD32/5t Double-Girder Bridge Crane
Kelude QD32/5t double-girder bridge crane is a heavy-duty material handling solution engineered for demanding industrial environments. With a rated lifting capacity of 32 tons (main hook) and 5 tons (auxiliary hook), this overhead crane delivers exceptional performance, reliability, and safety for a wide range of applications, including manufacturing plants, steel mills, warehouses, and assembly lines.
Double-Girder Overhead Crane Design and Construction
The QD32/5t double-girder overhead crane features a robust box-type girder design that ensures high rigidity and minimal deflection, even under full-load conditions. The crane is equipped with a dual-hook configuration, with the main hook rated at 32 tons and an auxiliary hook at 5 tons, providing greater operational flexibility for handling a variety of loads. The entire structure is fabricated from high-quality steel plates, welded using advanced techniques to guarantee long-term durability and resistance to fatigue.
The crane's end carriages are designed with precision-machined wheels and heavy-duty bearings, ensuring smooth travel along the runway rails. The trolley traverses the bridge girders with low rolling resistance, enabling precise load positioning. All critical components, including the gearboxes, couplings, and brakes, are sourced from reputable manufacturers and undergo rigorous quality inspections to meet international standards.
Reliable Electric Hoist and Crane Trolley System
The QD32/5t bridge crane is powered by a high-performance electric hoist and trolley system that ensures smooth, precise, and efficient load handling. The hoist mechanism features a helical gear reducer, which delivers high transmission efficiency and quiet operation. The motor is equipped with a built-in electromagnetic disc brake, providing reliable stopping power and preventing load drift during lifting and lowering operations.
The crane trolley is designed for optimal load distribution, with four wheels and a compact profile that maximizes hook coverage. The auxiliary hoist, rated at 5 tons, allows for handling lighter loads at higher speeds, improving overall workflow efficiency. Both hoists are fitted with limit switches for upper and lower travel, as well as overload protection devices to safeguard the crane and the operator.
Safe and Efficient Crane Operation Features
Safety is a top priority in the design of the Kelude QD32/5t overhead crane. The crane is equipped with multiple safety features, including:
- Emergency stop button for immediate power cutoff in critical situations
- Overload limiter to prevent lifting beyond rated capacity
- Travel limit switches for both the trolley and the bridge to prevent over-travel
- Anti-collision buffer system on the end carriages to absorb impact energy
- IP54-rated electrical enclosures to protect against dust and water ingress
- Low-voltage control circuit (36V) for the pendant station, ensuring operator safety
The crane is controlled via a rugged pendant station with clearly labeled buttons, allowing the operator to manage all movements—hoisting, lowering, trolley traverse, and bridge travel—with precision. Optional remote control is available for enhanced operational convenience and safety.
Customizable Double-Girder Crane for Industrial Applications
The QD32/5t double-girder bridge crane can be customized to meet specific application requirements. Options include:
- Various span lengths and lifting heights to suit facility dimensions
- Different control modes: pendant, remote control, or cabin operation
- Explosion-proof configuration for hazardous environments
- Variable frequency drive (VFD) for smooth acceleration and deceleration
- Special coatings for corrosion resistance in harsh environments
- Additional features such as weighing systems, magnet attachments, or grab buckets
This crane is widely used in steel processing, automotive manufacturing, prefabricated concrete production, general warehousing, and maintenance workshops. Its versatility and robust construction make it a cost-effective solution for improving material handling productivity.
Technical Specifications of the QD32/5t Overhead Crane
| Parameter | Value |
|---|---|
| Main Hook Lifting Capacity | 32 tons |
| Auxiliary Hook Lifting Capacity | 5 tons |
| Span (Typical Range) | 10.5 m – 31.5 m |
| Lifting Height (Main Hook) | 6 m – 30 m |
| Lifting Height (Auxiliary Hook) | 8 m – 34 m |
| Hoisting Speed (Main Hook) | 1.5 – 7.5 m/min |
| Hoisting Speed (Auxiliary Hook) | 2 – 15 m/min |
| Trolley Travel Speed | 20 – 40 m/min |
| Bridge Travel Speed | 30 – 75 m/min |
| Working Duty | A5 – A7 (ISO 4301) |
| Power Supply | 380V / 50Hz (customizable) |
| Control Voltage | 36V / 220V |
| Operation Mode | Pendant / Remote / Cabin |
Quality Assurance and International Standards Compliance
The Kelude QD32/5t double-girder bridge crane is designed, manufactured, and tested in accordance with ISO 4301 for crane classification, ISO 12480 for safe use, and IEC 60204-32 for electrical equipment. Each crane undergoes a comprehensive factory acceptance test, including load testing at 125% of rated capacity, to verify structural integrity and operational performance.
All welding procedures are performed by certified welders and inspected using non-destructive testing methods to ensure weld quality. The crane is supplied with complete documentation, including load charts, maintenance manuals, and CE declaration of conformity, ensuring full traceability and compliance with international regulations.
Frequently Asked Questions About the QD32/5t Crane
Q: What is the maximum lifting capacity of the QD32/5t double-girder bridge crane?
A: The main hook has a rated lifting capacity of 32 tons, while the auxiliary hook is rated at 5 tons. This dual-hook configuration allows for flexible handling of both heavy and lighter loads.
Q: Can the crane span and lifting height be customized?
A: Yes, the span can be customized from 10.5 meters to 31.5 meters, and the lifting height can be adjusted from 6 meters to 30 meters for the main hook. Custom configurations are available to meet specific facility requirements.
Q: What safety features are included with the crane?
A: The crane is equipped with an overload limiter, emergency stop button, travel limit switches, anti-collision buffers, and low-voltage control circuits. Optional explosion-proof configurations are also available for hazardous environments.
Q: What is the working duty rating of this crane?
A: The crane is designed for working duty classifications A5 to A7 as per ISO 4301, making it suitable for moderate to heavy-duty industrial applications.
Q: Does the crane comply with international standards?
A: Yes, the crane is designed and tested in accordance with ISO 4301, ISO 12480, and IEC 60204-32 standards, ensuring compliance with international safety and performance requirements.
