Cold-store racking
A cold-store racking system is a steel storage structure designed to hold pallets of chilled or frozen food safely and densely inside a refrigerated warehouse. Cold-store racking is the final station of the line. Finished pallets arrive from the palletiser, stretch wrapper and blast freezer, are put away into racking and held until they are picked for dispatch. Because refrigerated space is expensive to build and to keep cold, cold stores aim to fit as many pallet positions as possible into each cubic metre, while still giving the access that stock rotation and order picking need. The main types trade storage density against selectivity, meaning how easily any single pallet can be reached. Selective pallet racking gives direct access to every pallet and suits many products with frequent picking, but uses more floor space for aisles. Drive-in and drive-through racking let forklifts drive into the rack to store pallets several deep on rails, giving high density for large quantities of the same product. Push-back racking stores pallets several deep on carts that roll back as new pallets are added, and pallet flow or live racking uses inclined roller lanes so pallets flow from the loading side to the picking side, giving first-in, first-out rotation. Mobile racking mounts rows of racks on motorised bases that move to open a single aisle where needed, giving near-block-stack density with full selectivity. Automated high-bay stores use stacker cranes or shuttles to store and retrieve pallets without people inside the cold area. Low temperatures affect the whole system. Steel, welds and components must suit low-temperature use, lubricants and batteries must be rated for cold, and floors are usually heated underneath to prevent frost heave. Racks must be designed for the building's structure, the loads, and any seismic requirements, and they need regular inspection and protection from forklift impact. Cost and performance depend on the number of pallet positions, storage density, selectivity, stock rotation rules, handling equipment, automation level, building height and temperature.
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Buying criteria
Start with the stock profile: number of products, pallets per product, turnover and whether you need first-in, first-out or first-expired, first-out rotation. Choose the racking type for density and selectivity. Selective racking gives access; drive-in, push-back, flow and mobile racking give density. Automated stores reduce labour in the cold. Design for cold. Confirm that steel, components, lubricants and moving parts are rated for your temperature, and that the floor and building can carry the loads. Match racking to forklifts and aisle widths, and plan for rack protection, load signage and regular inspections. Check compliance with local structural and seismic design rules and the supplier's installation and inspection support. Ask about lead times for replacement components after forklift damage, because a damaged upright must usually be unloaded and isolated until it is repaired.
Buyers ask
How much does cold-store racking cost?
It depends on the number of pallet positions, the racking type, rack height, load ratings and the level of automation. Selective racking costs less per position than mobile or automated systems, but those can reduce the size of the refrigerated building needed. Installation, rack protection, inspections and the forklifts or cranes that serve the racks should be included.
What is the best racking for a cold store?
There is no single best type. Selective racking suits many products with frequent picks. Drive-in and push-back racking suit many pallets of few products. Mobile racking and automated high-bay stores give high density with good access, which is valuable because refrigerated space is expensive.
Why is density important in a cold store?
Every cubic metre of a cold store must be insulated, built and kept cold, so unused space is costly. Denser racking fits more pallets into the same refrigerated volume, which lowers the building and energy cost per pallet stored.
What is FIFO in food storage?
FIFO means first in, first out: the oldest stock is shipped first. Many food plants use FEFO, first expired, first out, based on best-before or use-by dates. Pallet flow racking and warehouse management systems help enforce the right rotation.