Summary for Dealers
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For more than twenty years, warehouse operators have been re-evaluating drive-in racking as inventory patterns shift and safety expectations rise. While drive-in was once the logical choice for high-volume, low-SKU storage, modern operations increasingly favour pushback systems for their flexibility, occupancy, and efficiency.
This overview gives dealers clear reasoning, supported by direct insights from 3D Storage Systems CEO Kevin Minkhorst, to help guide client conversations.
Drive-in racking only performs well when pallet quantities per SKU are high enough to fill deep tunnels.
Kevin Minkhorst explains the practical challenge clearly: “A drive-in system requires larger lot quantities in order to get good density and utilization… if you’re four pallets high and five pallets deep, that’s 20 pallets in that tunnel, and then you’ve got to have at least three tunnels… you’re talking 60 pallets per product in order to make good use of that drive-in.”
Many warehouses now deal with smaller lot sizes and higher SKU variety than in the past, which makes it harder to maintain the large pallet counts needed for drive-in to operate efficiently.
A five-deep pushback lane reaches full density with just 15 pallets per product, making it better aligned with current SKU and inventory patterns.
3D’s Justification Handbook includes SKU-per-depth tables that illustrate this logic in detail.
Honeycombing — empty, unusable space left in a deep lane — becomes a bigger issue when SKUs increase and pallet counts decrease.
While honeycombing can occur in any deep-lane system, it is more severe in drive-in because tunnels require large quantities to maintain occupancy.
When customers try to work around this by mixing products in a drive-in lane, the hidden labour cost becomes significant. Minkhorst notes: “Sometimes people realize that they have honeycombing going on and so to solve it, they mix product in the tunnels… but then they realize they’re getting killed in manpower by constantly having to move pallets around.”
Pushback avoids tunnel-entry handling and reduces the need to shuffle inventory.
Drive-in systems place the forklift directly inside the rack structure, which naturally increases the chance of frame contact. Over time, even small, repeated bumps create cumulative wear. Kevin Minkhorst notes that damage is a recurring issue in drive-in systems, especially as they age. He explains that most existing drive-in installations he sees have accumulated damage over time and that this is a common reason customers move away from the system.
The design of drive-in contributes to this vulnerability. The frames are tall, with the columns tied together primarily at the top, leaving a long, unsupported span that is more susceptible to sway and lateral force. Because operators must navigate narrow tunnels with a raised load, the margin for error is small.
In contrast, pushback racking distributes structural ties across multiple beam levels throughout the bay, creating a more rigid system that better resists impact. Dealers should be aware that this structural difference is one of the main reasons customers often move away from drive-in.
“…the industry has shifted from strong hardwood pallets to more economical softwood options, which increases the likelihood of cracked boards, inconsistent dimensions, or weakened contact points.”
Drive-in is also more sensitive to pallet condition. Since the system supports each pallet only along its two outer edges, the entire load depends on the integrity of those perimeter boards.
In addition, as Minkhorst notes, the industry has shifted from strong hardwood pallets to more economical softwood options, which increases the likelihood of cracked boards, inconsistent dimensions, or weakened contact points.
When the pallet’s underside fails in a drive-in system, there is little redundancy built into the structure to prevent the load from dropping. Pushback racking avoids this limitation by using full-width, heavy-duty carts that support more of the pallet surface. This design accommodates pallet variability far more effectively and reduces the operational risk associated with aging or inconsistent pallet pools.
For many customers, this difference becomes a deciding factor.
Engineering Standards Have Narrowed the Cost Gap
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Drive-in racking has long been viewed as the lower-cost high-density option, but modern engineering and seismic requirements have changed that calculation. Current standards place stricter demands on how racking systems must handle lateral forces and overall structural stability. Because drive-in relies on upright frames that span the full height with fewer intermediate connection points, bringing these systems up to code often requires thicker steel, additional bracing, and heavier components than earlier installations would have needed.
Pushback racking, by design, includes multiple beam levels throughout the structure. That built-in rigidity means fewer adjustments or reinforcements are typically required to meet the same engineering criteria. As a result, the initial cost difference between the two systems has narrowed considerably, and in some configurations, they can be comparable.
3D’s layout studies reinforce this from a space-planning perspective. Pushback often fits more pallet positions into the same building footprint, or delivers the same number of pallet positions in less square footage. When customers evaluate the full picture — rack cost, floor space, building size, and long-term operational efficiency — the total cost per pallet stored often tilts toward pushback rather than drive-in. For dealers, this is a practical point to communicate: decisions based solely on historical assumptions about price may overlook the more relevant cost factors in today’s environment.
Drive-in remains appropriate for specific high-volume applications, including:
Examples include beverage production, water bottling, and commodity goods with large production runs.
“It is possible to get a good use of a drive-in if you have the right inventory.” Minkhorst asserts.
Dealers should focus on helping customers match the storage system to their SKU behaviour, since drive-in remains best suited for large, uniform lots while pushback is more effective for mixed SKUs and moderate lane depths.
It is also important to frame the discussion around total cost of ownership rather than rack price alone, drawing attention to ongoing considerations such as damage, labour, and occupancy. Dealers can strengthen these conversations by highlighting 3D’s engineering-first approach, including linked carts, dependable empty-cart return made possible by the 3/8 inch per foot slope, the high structural rigidity of the rack design, and the availability of detailed SKU and inventory analysis supported by custom CAD layouts.
Finally, as customers plan for growth, dealers can position pushback as a future-ready option that adapts more easily to rising SKU counts without requiring extensive warehouse reconfiguration.
Experienced and productive warehouse storage systems are integral to properly functioning or running any business. Drive racks are common with the current trend for space savings and a desire for straightforward, high-density storage to enhance stock management. Enter drive-in racking and drive-thru racking — two innovative solutions that are designed to help you maximise your storage density and minimise your real estate usage.
Drive-in racking and drive-thru racking are also operationally comparable in terms of effective use and downfall differences. Differentiating between these two racking systems is critical to selecting the right solution for a particular warehouse and operational strategy.
Through this article, we aim to help warehouse managers or decision-makers discern which warehousing racks can be a viable solution to enhance their operation.
Drive-in racking is a high-density storage system that significantly increases space utilisation by reducing the number of aisles within your warehouse. The system is designed for forklifts to drive straight into the storage lane, with pallets on rails in tight blocks.
Drive-in racking is a good option for warehouses with large quantities of items, but low turnover rates. It works on a LIFO principle (Last-In, First-Out). In single-side access, pallets are loaded or unloaded from the same entry point, meaning they are last in, first out regarding removal — the last pallet entered into the system will be the first one removed. It is ideal for housing bulk amounts of the same product and removing them from stock only when necessary.
They are commonly used in:
Drive-thru racking is a flexible storage system that maximises accessibility and inventory turnover. Unlike drive-in racking, which requires entering from a single side, this style allows forklifts to drive through multiple aisles from one end and out the other, granting higher flexibility to operators with goods flow. It is often used when warehouses require a more dynamic flow.
Drive-thru racking is frequently used for applications requiring stock rotation and access. It works on a FIFO (First-In, First-Out) basis. Pallets are loaded on one side and unloaded from the other in a double-sided access manner. This system is ideal for perishable goods and items where stock rotation is crucial.
They are especially ideal for:
Choosing the appropriate racking system for your warehouse is a decision that hinges on several critical factors. Here’s a breakdown of the key considerations to guide your choice between drive-in racking and drive-thru racking:
FACTORS DRIVE-IN RACKING DRIVE-THRU RACKINGWhile drive-in racking and drive-thru racking are viable heavy duty rack options to install based on product turnover, limited storage space principles, rotation of stock needs, and access to a forklift, other areas must be considered. Each system has its advantages and disadvantages that can effectively enhance your warehouse operations.
The best pallet racking system ultimately depends on the inventory you manage and how it is operated. Choosing the right racking system can contribute to a safe and organised warehouse environment, ensuring long-term success and efficiency in your storage management.
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