Converting flat multi-function conference halls into tiered auditorium seating requires high structural rigidity over long spans without floor shudder. This 3-tier synchronized stepped scissor stage lift utilizes multi-point hydraulic pantographs to elevate elongated seating rows across stepped elevation profiles up to 1500 mm.
Synchronized Multi-Cylinder Drive: Electronic flow dividers maintain platform parallelism within ±2 mm across 15-meter spans.
Low-Profile Compact Pit Depth: Retracted height under 350 mm allows flush floor integration in standard slab recesses.
Acoustic Low-Noise Package: Submerged motor power units maintain sound emissions below 50 dB(A) in quiet hall environments.
| Technical Parameter | Standard Specification | Engineering Customization Range |
| Platform Configuration | 3 Independent Synchronized Stepped Tiers | 2 to 6 stepped tiers / Curved configurations |
| Rated Payload Capacity | 500 kg/m ² (Uniformly Distributed Seating Load) | Fully Customizable to Client Specifications (Up to 1,500 kg/m ²) |
| Individual Tier Dimensions | 12,000 mm (L) × 1,200 mm (W) per tier | Fully Customizable to Client Specifications (Length 6m – 24m) |
| Raised Tier Heights | Tier 1: 300 mm / Tier 2: 600 mm / Tier 3: 900 mm | Fully Customizable to Client Specifications (Stroke up to 2.5m) |
| Retracted / Lowered Height | 300 mm – 350 mm (Flush floor pit profile) | Shallow pit or ultra-low profile configurations |
| Synchronization Method | Electronic Flow Dividers + Optical Encoders | Linear transducer closed-loop servo sync (±1 mm) |
| Drive Mechanism Type | Multi-Cylinder Electro-Hydraulic Pantograph | Electric screw jack / Rigid chain push actuation |
| Lifting Linear Velocity | 1.0 – 2.0 m/min (Cushioned acceleration) | Proportional speed regulation via VFD |
| Operating Sound Level | ≤ 50 dB(A) at 1 meter distance | Submerged low-noise acoustic power pack |
| Platform Deck Surface | 4 mm Diamond Tread Plate / Recessed Sub-Base | Hardwood parquet / Carpet-ready acoustic panel |
| Hydraulic Power Unit | 7.5 kW Remote Power Pack with Proportional Valves | Sized per total platform surface area and load |
| Safety Arrestor System | Hydraulic Velocity Fuses + Mechanical Safety Props | Full perimeter contact safety edges / Under-deck nets |
| Control System Interface | Siemens PLC Touchscreen HMI + Wall Push-Button Box | DMX512 / Crestron audio-visual room automation links |
| Power Supply Rating | 380V / 50Hz / 3-Phase | Fully Customizable to Client Specifications (208V–480V, 60Hz) |
| Surface Finish & Color | Industrial Polyurethane Enamel (Ivory RAL 1013 / Black) | Custom RAL architectural finishes |
Each stepped tier utilizes high-strength structural rectangular hollow sections (RHS) reinforced by internal cross-trusses to resist localized deflection across platform lengths up to 18 meters. The scissor pantograph arms feature precision laser-cut heavy steel plate with induction-hardened pivot pins and self-lubricating bronze-graphite composite bushings. The top deck incorporates 4 mm anti-skid steel tread plate or recessed structural sub-flooring designed to receive acoustic carpet, hardwood, and tiered seating rows with 500 kg/m ² uniform distributed load ratings.
Hydraulic power units integrate high-precision gear flow dividers and multi-point pressure gauges inside a remote acoustic enclosure for floor-level servicing. Mechanical drop-in maintenance safety struts lock the scissor arms in an open position during inspection without hydraulic pressure. GRADIN provides a 12-month structural and hydraulic warranty, complete structural deflection calculation sheets, electrical logic schematics, and rapid spare valve delivery.
A central touch-screen control console provides single-button automated sequencing between flat banquet mode, stepped auditorium mode, and custom tiered configurations. Proportional descent valves eliminate abrupt stopping shocks when landing on concrete base recesses. For multi-purpose halls that also require heavy backstage equipment elevation, facilities can integrate complementary custom synchronized scissor lifts to handle bulk stage logistics.
Integrated hydraulic velocity fuses on every cylinder port block fluid backflow upon line rupture, locking all platform tiers in position. Optical safety edges and expanding perimeter bellow skirts prevent mechanical pinch hazards beneath the descending scissor framework. The stage lifting system satisfies international entertainment technology and structural safety directives:
ANSI MH29.1 safety requirements for industrial scissor lifts and elevating platforms
OSHA 1910 standard for walking-working surfaces and floor protection
DIN 56950-1 Entertainment Technology – Machinery Installations – Safety Requirements and Testing
CE Machinery Directive 2006/42/EC compliance for stage machinery and lifting platforms
Corporate Auditorium Tiered Seating: Elevating flat hall floors into three tiered seating levels for executive presentations and shareholder meetings.
University Lecture Hall Transformation: Reconfiguring flat multi-use event halls into tiered lecture rooms with integrated student desks.
Municipal Cultural Center Stages: Variable-height stepped stage platforms for orchestral performances, choir presentations, and theater sets.
Hotel Multi-Function Ballrooms: Rapid conversion of open convention floors into tiered keynote seating without temporary scaffolding.
Government Assembly Chambers: Synchronized vertical positioning of tiered delegate desks and press staging areas.
Broadcast Studio Tiered Sets: Adjustable multi-tier studio audience risers and camera tracking decks.
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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