The Gradin Heavy Equipment Scissor Dock Lift elevates 30000 kg construction machinery across an 1800mm vertical stroke, bridging plant floors straight to flatbed trailers without civil concrete ramps.
Rated Capacity: 30000 kg (30T payload)
Envelope / Pit: 10.5 x 3.8 x 0.9 m pit
Motion Spec: 1.8m rise @ 2.5 m/min
Working Surface: 10.0 x 3.5 m deck
| Engineering Parameter | Imperial Measurement | Metric Value | Structural Standard & Material Traceability |
| Rated Load Capacity | 66138 lbs | 30000 kg (30 Metric Tons) | Uniformly distributed load for 30-ton hydraulic loading dock lift |
| Vertical Lifting Travel | 70.87 in | 1800 mm | Grade-to-trailer bed elevation change |
| Platform Deck Area | 32.81 x 11.48 ft | 10000 mm x 3500 mm | Construction machinery dispatch platform working surface |
| Civil Pit Envelope | 34.45 x 12.47 x 2.95 ft | 10500 x 3800 x 900 mm | Pit footprint including perimeter curb angle steel |
| Collapsed Machine Height | 35.43 in | 900 mm | Retracted frame sits flush with shop concrete floor |
| Lifting Linear Velocity | 8.20 ft/min | 2.5 m/min | Regulated by pressure-compensated proportional valves |
| Scissor Leg Material | 1.57 in Solid Plate | 40 mm Solid Steel | ASTM A572 Gr. 50 / S355JR (certified GB Q355B equivalent, EN 10204 3.1) |
| Chassis & Deck Structure | Heavy Wide-Flange | 300 mm H-Beam Grid | High-section perimeter beams prevent torsional fatigue |
| Surface Plate Spec | 0.315 in Checkered | 8 mm Carbon Steel | High-traction anti-slip checkered deck plate |
| Transition Lip Dimensions | 11.48 x 3.28 ft | 3500 mm x 1000 mm | 16mm thick hydraulic transition bridge plate |
| Electric Motor Power | 24.8 HP | 18.5 kW / 380V / 50Hz | Siemens IE2 high-efficiency drive unit with cooling fan |
| Hydraulic Cylinders | 4 Units @ 5.9-4.7 in | Φ150-120 mm Heavy Rams | Custom honed cylinder barrels with induction-hardened rods |
| Main Pivot Pin Material | AISI 5140 Quenched | 40Cr Alloy Steel | Quenched and tempered alloy steel (EN 41Cr4 equivalent) |
| Safety Velocity Valves | Internal Cartridge | Mechanical Rupture Fuses | Dual-cylinder mechanical velocity fuses direct in cylinder ports |
| Logic Automation Unit | Digital PLC Enclosure | Siemens S7 Control Box | Siemens PLC hydraulic power unit with remote console |
| Operator Console Type | Pedestal NEMA 4X | Pushbutton Dead-Man | Key-switch interlocked with warning horns and strobes |
| Standard Compliance | ASME B20.1 / ANSI MH29.1 | Type Tested | Certified to BS EN 1570-1:2024 |
Flame-cut from 40mm solid steel plate and cross-tied with rigid torque tubes, this frame eliminates structural deflection under 30-ton dynamic axle loads. Machined on computer gantry mills, the ASTM A572 Gr. 50 scissor legs (certified GB Q355B/Q345B equivalent with EN 10204 3.1 certificates) absorb concentrated point loads as heavy booms roll over this construction machinery dispatch platform.
Formed from 16mm checkered steel plate and actuated by dual assist cylinders, this hydraulic transition bridge plate eliminates tire impact jolt on lowboy trailer beds. The heavy hinged lip bridges the gap between the lift deck and highway trailers, providing an even rolling surface that protects vehicle suspension components during transit onto this 30-ton hydraulic loading dock lift.
Threaded straight into hydraulic ram port manifolds without flexible rubber hoses, these dual-cylinder mechanical velocity fuses prevent catastrophic platform descent during hose rupture. If an external pressure line shears, internal poppets seat within 50 milliseconds to lock high-pressure oil inside cylinder barrels, keeping static 30000 kg machine loads secure in full compliance with ASME B20.1 dock safety standard rules.
Governed through digital limit logic and interlocked perimeter wire mesh barriers, this Siemens PLC hydraulic power unit eliminates descent hazards with personnel present inside pit zones. The 18.5 kW drive system monitors hydraulic pressure and optical light curtains from an exterior NEMA 4X console, halting scissor motion the moment interlocks trip to safeguard workers during construction equipment dispatch cycles.
Engineered for mobile elevating work platform plants and heavy equipment test yards. This construction machinery dispatch platform withstands 25% dynamic eccentric loads when heavy telescopic booms roll across the 10 x 3.5m deck. Anchored in a perimeter-drained concrete pit, the unit operates across -25°C to +50°C ambient yard temperatures without foundation cracking.
Deployed at inland distribution docks handling heavy four-wheel-drive tractors and mining haulers. The anti-slip checkered deck plate sustains 30000 kg gross axle loads with 125% static proof overload margin under harsh mud and oil contamination. Set within a 10500 x 3800 x 900mm reinforced concrete slab, it withstands outdoor freezing cycles without ground subsidence.
Functions as a high-capacity 30-ton hydraulic loading dock lift to bridge shop floors with lowboy trailers ranging from 900mm to 1800mm in bed height. Built to absorb trailer suspension compression during transit, the hydraulic transition bridge plate floats across variable vehicle decks while the perimeter pit foundation carries all localized impact loads without floor settlement.
For this heavy-duty series, we can engineer load capacities up to [300] tons, with platform dimensions and lifting heights customized to your operational envelope. Requirements exceeding our standard engineering matrix will undergo a Finite Element Analysis (FEA) by our engineering team to ensure structural viability before proposing a solution.
To initiate the engineering proposal, please provide the following baseline data:
Rated Load Capacity
Maximum Lifting Height & Closed Height
Platform Dimensions (L x W)
Duty Cycle (e.g., operational cycles per hour/day)
Environmental Conditions (e.g., indoor/outdoor, washdown, explosion-proof)
Pit depth or overhead clearance constraints
Yes. The control systems can be equipped with standard communication protocols (e.g., Profinet, Modbus, Ethernet/IP) utilizing [Siemens / Allen-Bradley / Omron] PLCs. This ensures seamless I/O signal synchronization with upstream/downstream conveyors, AGV/AMR units, and your central control room.
Every custom unit undergoes a mandatory Factory Acceptance Test (FAT) prior to dispatch. This includes continuous operational testing at 100% rated load, static overload testing at [120% / 125%] capacity, and the physical triggering of all mechanical anti-fall and hydraulic safety interlocks. FAT documentation and video proof are included in your engineering package.
Upon final approval of the General Arrangement (GA) drawings, the manufacturing lead time is typically 4 to 8 weeks. Oversized structural components are engineered with a modular design to fit into standard shipping containers (20FT/40HQ). On-site assembly utilizes pre-engineered bolted flange connections and heavy-duty aviation plugs, strictly eliminating the need for field welding.
We provide a standard [12/24]-month warranty covering the structural frame and primary hydraulic/electrical components. To minimize operational downtime, a comprehensive set of standard consumables (e.g., cylinder seal kits, travel switches, relays) is shipped alongside your equipment. During the warranty period, replacement parts for non-human-induced failures are dispatched via priority air freight (DHL/FedEx) within 48 hours.
Beyond the warranty, we guarantee lifetime engineering support. Your custom equipment's CAD drawings, electrical schematics, and BOM (Bill of Materials) are permanently archived in our system. This ensures you receive uninterrupted remote troubleshooting, maintenance guidance, and exact spare parts matching for the entire lifecycle of the equipment.
Gradin Machinery is a leading manufacturer specializing in aerial work platforms and hydraulic lifting solutions. With ISO & CE certifications, we provide safe, reliable, and customized equipment for global industrial needs
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