When facility floor space is at a premium — crowded with forklift traffic, production machinery, and material handling equipment — any storage system that occupies ground level competes directly with production operations. Herochu designed the Top-Mounted Automatic Overhead Profile Vertical Storage System to eliminate this competition entirely. By mounting the gantry traveling mechanism on elevated runways above the storage towers, the system leaves 100% of ground-level space open for forklift pathways, personnel movement, and downstream production equipment.

The overhead configuration represents a structural variant within the Herochu ASRS product family. Where the floor-mounted gantry variant routes rails into the concrete slab, the top-mounted variant suspends the entire traveling and lifting mechanism from elevated runway structures, with a suspended platform executing vertical bundle movement.

Overhead Traveling Car and Suspended Platform

The mechanical design centers on an overhead traveling car that runs along elevated runway rails mounted above the storage tower array. This car carries the lifting mechanism, which lowers a suspended platform to the target storage layer, retrieves or deposits a material bundle, and lifts it back to the runway level for horizontal transit to the picking station.

Herochu engineered this architecture to deliver several structural advantages. First, the storage towers themselves bear only vertical material loads — they do not carry the gantry horizontal travel dynamics. This reduces tower structural requirements and simplifies installation on facilities where the floor slab cannot accommodate heavy rail mounting. Second, the Herochu elevated runways can span longer distances without intermediate support columns, creating continuous storage rows unbroken by structural obstacles.

Ground-Level Clearance Benefits

The most visible advantage of the top-mounted overhead system is complete ground-level clearance. With no floor rails, no gantry structure at ground level, and no traveling mechanism crossing production pathways, the facility floor remains fully accessible to forklifts, personnel, and mobile equipment at all times.

This clearance matters most in facilities where material flow patterns require frequent ground-level crossings — for instance, where forklifts must transit between storage areas and cutting stations, or where personnel need unobstructed emergency egress routes. The overhead system keeps these pathways permanently clear without compromising storage capacity or retrieval speed.

Load Capacity and Material Handling

Despite the overhead configuration, the system maintains the same heavy-duty load capacity as the floor-mounted variant. Each storage layer supports working loads up to 5,000 kg. Material lengths range from 6,000 mm to 8,000 mm depending on model configuration, with structural support provided by bin cell grids measuring 600 mm × 500 mm that prevent point-loading deflection.

The Q235B high-strength steel tower framework undergoes Simsolid and Ansys finite element analysis to verify structural rigidity under maximum load. The elevated runway structures receive equivalent engineering scrutiny, as they must support both the gantry dynamic loads and the cantilevered weight of suspended bundles during transit.

Precision and Speed

The overhead traveling car delivers horizontal travel at 5–30 m/min, and the suspended platform lifts at 5–15 m/min. Positioning repeatability holds within ±2 mm — the same precision specification as the floor-mounted variant. This consistency matters because the suspended platform must align precisely with storage cell coordinates to avoid contact damage during bundle insertion, particularly when handling surface-sensitive alloy profiles.

Transfer speed during material handoff reaches up to 12 m/min, and a standard retrieval cycle completes in under two minutes from order initiation to bundle delivery.

Smart Control Integration

The top-mounted system shares the same control architecture as the floor-mounted variant. A Siemens S7-1200 PLC coordinates gantry and platform movements over PROFINET networks. The 12-inch touchscreen HMI displays real-time stock levels, bundle locations, and retrieval order interfaces.

Closed-loop inventory logging tracks every material transaction — entry, storage position, duration, and retrieval. The Herochu system integrates with facility MES and ERP platforms, enabling production-triggered automatic material calls that retrieve and stage materials without operator intervention.

Model Configurations

Three standard configurations are available, all customizable:

• HC-X6053-8: 6,000 mm pipe length, 5 layers, 3,000 kg per level, 8 racks
• HC-X7065-10: 7,000 mm pipe length, 6 layers, 5,000 kg per level, 10 racks
• HC-X8085-10: 8,000 mm pipe length, 8 layers, 5,000 kg per level, 10 racks

All layer counts and rack quantities are customized to match on-site ceiling clearance and material volume requirements.

Ideal Applications

The top-mounted overhead system is particularly suited to facilities where:

• Floor-level gantry rails would obstruct critical forklift or personnel pathways
• The concrete slab cannot support heavy floor-mounted rail loads without reinforcement
• Production layout requires unobstructed ground-level material flow
• Storage rows must span long distances without intermediate support columns
• Future layout reconfiguration may require ground-level space flexibility

Summary

The Herochu Top-Mounted Automatic Overhead Profile Vertical Storage System relocates the entire gantry and lifting mechanism to elevated runways, leaving ground level completely open for production operations. With 5,000 kg per-layer capacity, ±2 mm positioning repeatability, Siemens PLC control, and full MES/ERP integration, it delivers the same automated storage performance as the floor-mounted variant while preserving maximum ground-level accessibility for facilities where floor space is the primary constraint.