Designed for heavy vehicle movement at an industrial ore-transport site, this hydraulic lift bridge connects operating levels without relying on a conventional freight elevator. The reference configuration has a 36-ton rated load, a 4.8 × 16 m platform and 4.2 m of vertical travel. Platform size, travel and vehicle-loading arrangement are engineered around each site.
| Technical Parameter | Engineering Specification / Design Standard |
| Equipment Designation | Heavy-Duty Hydraulic Vertical Lift Bridge |
| Model Number Code | SJD36.0-4.2 Industrial Vertical Lift Bridge |
| Rated Vehicular Payload | 36,000 kg Safe Working Load (125% static proof-load tested to 45,000 kg) |
| Bridge Deck Dimensions | 4800 mm W × 16,000 mm L heavy structural steel deck plate |
| Standard Option Deck | 4800 mm W × 10,000 mm L modular short-span option |
| Equipment Footprint Envelope | 5600 mm W × 16,000 mm L clear boundary clearance profile |
| Vertical Lifting Travel | 4200 mm continuous stroke (2 levels, 2 terminal landing stops) |
| Lifting Linear Velocity | 2.0 to 4.0 m/min proportional controlled travel speed |
| Kinematic Architecture | 4-cylinder 8-post hydraulic lifting system with top portal trusses |
| Structural Frame Grade | ASTM A572 Grade 50 overhead portal truss and guide columns |
| Material Verification | Certified mill test reports supplied per EN 10204 Type 3.1 |
| Hydraulic Drive Units | Dual electro-hydraulic proportional pump stations (split-end mounted) |
| Synchronization Method | Linear optical encoder leveling control with closed-loop PLC logic |
| Vehicular Drive-Through | 4800 mm clear bidirectional vehicle transit aperture |
| Platform Crash Barriers | 1200 mm high heavy-duty box-beam crash guardrails on both sides |
| Default Rest Position | Elevated safe park position clearing subterranean rail head clearance |
| Operator Control Modes | Console pushbuttons, handheld radio remote, and rail traffic light sync |
| Safety Code Compliance | ASME B20.1:2021 vertical conveyor safety requirements for heavy haulage |
CNC edge beveling and automated submerged arc welding fabricate ASTM A572 Grade 50 structural steel into rigid overhead portal trusses. The closed box-truss geometry stops gantry frame twist under 120 km/h wind shear and 36,000 kg haul truck dynamic braking forces. Dual portal towers bolt to reinforced concrete spread footings, channeling kinetic moment forces into the ground slab. Mill test certificates supplied per EN 10204 Type 3.1 trace raw plate yield strength past 345 MPa.
Burnished cylinder barrels and induction-hardened chrome rods preserve internal piston seals across four single-acting lift rams. The lifting powertrain divides vertical truck wheel loads across eight heavy wide-flange guide columns (HE140B / W6×20 structural sections). Precision cast-steel guide shoes stroke along machined column tracks to absorb lateral side-thrust forces, keeping the platform level as loaded haulers roll across the entry thresholds.
Integrated linear optical scales feed continuous carriage position data into a central automation PLC, adjusting proportional spool valves to equalize displacement within 3.0 mm across the 16-meter deck span. The control system defaults the bridge to its top park elevation (4200 mm raised datum), keeping subterranean train corridors clear until optic sensors confirm inbound haul trucks at the entry gate.
Monoblock hydraulic manifolds with proportional cartridge cavities absorb pressure surges during rapid flow direction changes. Two independent power units sit mounted on opposite ends of the 16-meter span, synchronizing fluid delivery to paired lifting cylinders through heavy-wall steel piping. Hard-piped counterbalance check valves mounted to each cylinder base port arrest platform movement in 15 ms if hydraulic line pressure drops, satisfying ASME B20.1:2021 industrial conveyor safety rules.
Nickel extraction facilities operate deep sunken rail cuts to run molten torpedo slag railcars between smelting furnaces and disposal dumps. Spanning the rail canyon, this vertical lift bridge lowers to floor datum to let 36,000 kg loaded slag haulers drive across without grade-crossing train collisions. Base towers anchor to 35 MPa reinforced concrete abutments, engineered to withstand continuous radiant slag heat and tropical plant ambient bounds from 0°C to +50°C.
Primary crushing plants route high-tonnage mining trucks over deep continuous overland ore conveyor trenches. The 4800 mm wide transit corridor accommodates heavy rigid dump trucks, absorbing asymmetric wheel loads up to 35% across the span without guide shoe binding. Foundation specifications require drilled rock caissons anchored into bed strata, maintaining operations under torrential rain and abrasive mineral dust from -5°C to +45°C.
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
Copyright ©2026 GRADIN Machinery. All Rights Reserved
🔒 Your project information is kept confidential. Our engineering team will respond within 24 hours to discuss your requirements and next steps.
