High-density rack where forklifts drive into the lane to deposit and retrieve pallets, typically several pallets deep.
Detailed Definition
Drive-in rack stores pallets in deep lanes. The forklift drives into the lane between the upright frames, and pallets rest on rails attached to the uprights on each side. Each lane has one entry point, so the last pallet in is the first one out (LIFO), which suits large quantities of the same item. It saves aisle space compared with selective rack but gives direct access only to the front pallet in each lane. A drive-thru rack is similar but open at both ends.
What products suit drive-in storage
Drive-in rack works best for products stored in large quantities of a few SKUs, where it does not matter which pallet comes out first. Seasonal goods, beverages, and some cold storage products are common examples. It is less suitable for products that need strict first in, first out rotation, such as items with short shelf life, unless the operation can empty each lane completely before refilling it. Mixing SKUs in one lane creates blocked pallets and extra handling.
Pallet and operating requirements
- Pallets sit on two rails along the edges of the lane, so the pallet must span the gap without sagging. Pallet size, bottom boards and condition should be consistent.
- Damaged or undersized pallets can drop off the rails, which is a serious hazard in a deep lane.
- Drivers work inside the rack structure, so training, slow speeds and rail guides help prevent impacts to uprights.
- The rack design should follow ANSI MH16.1 and the supplier's rated load for each level.
Inspect uprights and rails regularly, because the inside of a drive-in lane takes more contact damage than an open aisle.
Related Glossary Terms
Frequently Asked Questions
Does drive-in rack allow first in, first out rotation?
Not in normal use. Because each lane is loaded and unloaded from the same end, the last pallet placed is the first one removed. Operations that need first in, first out usually choose drive-thru rack, which is loaded from one end and picked from the other, or pallet flow rack. A drive-in lane can achieve rotation only if it is fully emptied before new stock is put in.
What kind of pallet works best in drive-in rack?
A sturdy pallet of consistent size and condition, oriented the way the rack was designed for, works best. Pallets rest only on side rails, so the bottom deck or stringers must carry the load across the open span without bending or breaking. Mixed sizes, broken bottom boards and weak recycled pallets increase the risk of a pallet falling inside the lane. Ask the rack supplier which pallet type and orientation the rails were designed for.