AS/RS Systems: Narrow Aisles Deliver Greater Storage Density
Automated Storage and Retrieval Systems (AS/RS) are computer-controlled warehouse installations operating with exceptional mechanical precision within very narrow aisles. By transitioning from conventional counterbalance lift truck aisles (typically 12 feet wide) to specialized automated crane aisles measuring approximately 7 feet or less, an AS/RS structure immediately frees up to 40% more warehouse floor space for productive inventory storage rather than dead aisle travel.
UNARCO RACKING engineers both heavy-duty Unit Load AS/RS and rapid-response Mini-Load AS/RS rack frameworks. Tailored to the load profile, SKU dimensions, and cycle speeds of global distribution centers, each installation utilizes vertical cube height up to 100 feet or higher, maximizing facility capacity without demanding real estate expansion.
Modern AS/RS technology connects dock unloading directly to crane retrieval lanes with virtually zero manual intervention. Automated guided vehicles (AGVs), shuttles, and automated cranes transport high-volume pallet loads seamlessly through the structure, maintaining exact inventory tracking and round-the-clock throughput.
Explore AS/RS Structural Configurations
UNARCO RACKING supplies custom-engineered rack frameworks manufactured to the exact tolerances demanded by leading global automation integrators.
System Benefits
Up to 40% floor space reclamation, 99.9% inventory precision, and minimal direct labor requirements across 24/7 operating schedules.
Unit Load AS/RS
Heavy-duty structural framework designed to support full pallet loads weighing up to 5,500 lbs (2,500 kg) per position at extreme vertical elevations.
Mini-Load AS/RS
High-speed, precision-engineered racking for totes, trays, and cartons, optimizing split-case fulfillment and high-velocity parts storage.
How AS/RS Works
Computer-coordinated cranes and shuttles travel on precision ground rails and top guide rails to deposit and retrieve inventory on automated command.
Feasibility & ROI
Accelerate payback when evaluating high land acquisition costs, facility expansion constraints, or extreme cold chain storage overheads.
Precision Engineering
Rigid deflection calculations, custom anchor embedments, and stringent plumb tolerances complying with RMI and international building codes.
Global Installations
Proven track record delivering reliable automated rack structures for Fortune 500 distribution centers and high-bay facilities worldwide.
VNA Storage Systems
Hybrid high-density configurations accommodating wire-guided turret trucks or automated shuttles for flexible warehouse scalability.
Precision Manufacturing for Automation Interfaces
Automated retrieval machinery operates at high acceleration rates and millimeter-level positional sensors. Therefore, AS/RS rack tolerances must remain dramatically stricter than standard manual pallet rack installations.
UNARCO RACKING applies advanced roll-forming and structural steel fabrication lines to eliminate beam curvature, upright frame twist, and cumulative assembly sway. Each system is designed to withstand dynamic crane brake forces, strict deflection limits under full load, and site-specific seismic ground motions.
| Parameter | Unit-Load AS/RS | Mini-Load AS/RS | VNA Man-Up System |
|---|---|---|---|
| Load Profile | Full Pallets / Bulk Wire Baskets | Cartons, Bins, Plastic Totes | Pallets & Case Picking |
| Weight Capacity | 1,000 lbs to 5,500+ lbs (500 – 2,500 kg) | 50 lbs to 500 lbs (25 – 250 kg) | Up to 3,500 lbs (1,600 kg) |
| Typical Aisle Width | 5.5 ft to 7.0 ft (1.7 m – 2.1 m) | 3.0 ft to 4.5 ft (0.9 m – 1.4 m) | 5.5 ft to 6.5 ft (1.7 m – 2.0 m) |
| Storage Height Range | Up to 130 ft (40 m) rack-supported | Up to 50 ft (15 m) | Up to 55 ft (17 m) |
| Handling Equipment | Automated Stacker Cranes / Shuttles | Mini-load Cranes / Robotic Extractors | Turret Trucks / VNA Order Pickers |
| Warehouse Environment | Ambient, Dry, Cold & Freezer (-40°F) | Ambient, Cleanrooms, Pharmaceutical | Ambient & Cold Storage |
Frequently Asked Questions: AS/RS Racking Engineering
Key technical insights for warehouse project managers, system integrators, and procurement directors evaluating automated storage solutions.
Why is aisle width critical in an AS/RS system?
Conventional forklift trucks require wide radius aisles between 10 and 13 feet to turn and pick pallets. Automated storage cranes and rail-guided shuttles operate in a straight path along fixed guides, requiring only 5.5 to 7 feet. By shrinking aisle volume, the system recovers up to 40% of building footprint and redirects valuable cubic area to high-density inventory storage.
What engineering tolerances distinguish AS/RS racking from standard pallet rack?
Because automated cranes travel at high horizontal and vertical speeds with computerized positioning sensors, tolerance thresholds are much more stringent. Beam deflection limits under full load, vertical plumb tolerances along tall column profiles, and top/bottom crane rail alignment must meet rigid integrator specifications and RMI ANSI MH16.1 guidelines.
Can UNARCO RACKING design rack-supported buildings using AS/RS?
Yes. In rack-supported building (clad-rack) configurations, the AS/RS racking framework acts as the primary structural support for the warehouse walls and roof, eliminating the need for conventional structural steel columns. This significantly accelerates build schedules and maximizes cubic storage per square meter.
How does UNARCO RACKING assist automation integrators?
UNARCO RACKING works directly with global automation OEMs, mechanical integrators, and general contractors. Our in-house engineering group performs seismic analysis, concrete slab anchor embedment evaluations, crane rail bracket integration, and custom connection detailing to ensure total system cohesion.
Consult with Our AS/RS Rack Engineering Specialists
Submit your system layout, crane loading requirements, or facility drawings to: [email protected]