Durchlaufregal
Also: Durchlaufregale, Fließregal, Fließregale, Gefälleregal, Rollenbahn-Regal, FIFO-Regal, Gravity-Flow-Rack, Durchlaufregal FIFO
AI-generated
A flow rack is a racking system with inclined roller tracks or conveying elements along which pallets or containers slide gravity-assisted from the loading side to the retrieval side.
Key facts
- A flow rack uses inclined roller tracks to convey load units gravity-assisted from the loading side to the retrieval side.
- The system automatically enforces the FIFO principle without the need for manual sorting by warehouse staff.
- The loading aisle and retrieval aisle are physically separated, which reduces path crossings and increases throughput.
- Lane depth, lane width and incline angle are the central planning parameters and must be matched to the respective item profile.
- Rollers and brake elements are subject to wear and require regular maintenance, which must be taken into account in the total cost of ownership calculation.
What is a flow rack?
A flow rack consists of inclined lanes — fitted with rollers, wheels or sliding surfaces depending on the stored goods — along which load units such as pallets, cartons or containers move automatically from the higher-level loading side to the lower-level retrieval side. Brake elements regulate speed and prevent uncontrolled impacts. The principle operates without a drive system, which significantly reduces energy consumption compared to motorized systems.
Two basic designs are distinguished: pallet flow racks for heavy load units — typically used in heavy-duty applications — and carton or container flow racks for small-parts picking. Both automatically enforce the FIFO principle, because each newly stored unit is queued behind the existing inventory and the oldest unit is always at the front at the retrieval opening.
How does a flow rack work in practice?
In warehouse operations, flow racks are frequently used as a buffer between goods receipt and order picking. Loading and retrieval staff work in separate aisles, reducing path crossings and waiting times. The automatic FIFO principle is a key advantage — particularly in food logistics, pharmaceutical distribution and for items with a best-before date — as manual checks are eliminated.
The capacity of a lane depends on the depth of the rack, the size of the load unit and the desired buffer stock. At high turnover frequencies, a shallow rack with many lanes may be more efficient than a deep one with few lanes. Specialists refer to lane depth and lane width as the central planning parameters in this context.
What matters when selecting a flow rack?
Several factors must be considered when planning a flow rack:
- Item profile: The weight, dimensions and packaging type of the load units determine whether roller tracks, wheels or sliding rails are used.
- Throughput: The number of picks per hour or pallet movements per shift directly influences the number of lanes and rack depth.
- Sensitivity of stored goods: Fragile or pressure-sensitive goods require adapted braking concepts and lower incline angles.
- Available space: Flow racks require fewer aisles than conventional pallet racking but need sufficient depth in the floor plan.
- Maintenance requirements: Rollers and brake elements are subject to wear and must be inspected regularly — a frequently underestimated operating cost factor.
Whether a flow rack is more cost-effective than a narrow-aisle rack or an automated small-parts warehouse depends heavily on the product mix, turnover frequency and available budget. A comparison within the framework of a structured business case is recommended before an investment decision is made.
Related terms
- ABC-Analyse
ABC analysis is a method for classifying items, vendors, or processes into three priority classes (A, B, C) based on their economic significance. It forms the basis for differentiated decision-making in warehousing, inventory management, and procurement.
- Auslagerung
Retrieval refers to the physical process by which goods or load units are removed from a storage area and transferred to a downstream process – such as picking or shipping.
- Automatisches Kleinteilelager (AKL)
The Automated Small Parts Warehouse (AKL) is a fully automated storage system for totes, trays and small parts, in which storage and retrieval operations are performed without manual intervention by stacker cranes or shuttle systems.
- Batch-Kommissionierung
Batch picking is a method in which multiple customer orders are consolidated into a single pick run. This allows the picker to travel one route while simultaneously covering positions from different orders.
- Blocklager
A block storage system is a storage method in which load units — typically pallets — are stacked directly on the floor in rows and blocks without any racking structure.
- Bodenlagerung
Floor storage refers to the storage of goods directly on the floor, without the use of racking systems. Pallets, stacks, or marked floor positions serve as the basic structure for area organization.
- Business Case Automatisierung
The Business Case Automation evaluates, from an economic and operational perspective, whether an investment in warehouse or intralogistics automation is justified. It summarizes costs, benefits, risks, and assumptions in a structured way, forming the basis for management approval decisions.
- Chaotische Lagerhaltung
Chaotic storage is a warehousing principle in which items are not stored in fixed, pre-assigned locations, but are instead dynamically placed in any available, suitable slot in the warehouse. A warehouse management system handles the control and tracking of all storage locations.
- Distributionslager
A distribution center is a type of warehouse that consolidates goods and prepares them for targeted delivery to customers, branches, or downstream locations.